EP0204176A2 - Chambre de combustion pour un appareil à combustion à lit fluidisé - Google Patents

Chambre de combustion pour un appareil à combustion à lit fluidisé Download PDF

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Publication number
EP0204176A2
EP0204176A2 EP86106354A EP86106354A EP0204176A2 EP 0204176 A2 EP0204176 A2 EP 0204176A2 EP 86106354 A EP86106354 A EP 86106354A EP 86106354 A EP86106354 A EP 86106354A EP 0204176 A2 EP0204176 A2 EP 0204176A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
chamber according
secondary air
fluidized bed
wall
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.)
Ceased
Application number
EP86106354A
Other languages
German (de)
English (en)
Other versions
EP0204176A3 (fr
Inventor
Werner Dipl.-Ing. Emsperger
Georg Lösel
Hermann Brückner
Rudolf Dipl.-Phys. Pieper
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.)
Siemens AG
Original Assignee
Kraftwerk Union AG
Siemens AG
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
Priority claimed from DE19853544887 external-priority patent/DE3544887A1/de
Application filed by Kraftwerk Union AG, Siemens AG filed Critical Kraftwerk Union AG
Publication of EP0204176A2 publication Critical patent/EP0204176A2/fr
Publication of EP0204176A3 publication Critical patent/EP0204176A3/fr
Ceased legal-status Critical Current

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Classifications

    • 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
    • F23C10/12—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 exclusively within the combustion zone
    • 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
    • F22B31/0092—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 with a fluidized heat exchange bed and a fluidized combustion bed separated by a partition, the bed particles circulating around or through that partition
    • 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 
    • F23C2206/00—Fluidised bed combustion
    • F23C2206/10—Circulating fluidised bed
    • F23C2206/101—Entrained or fast fluidised bed

Definitions

  • the invention relates to a combustion chamber with a fluidized bed combustion, with a nozzle plate, with a fuel supply above the nozzle plate, with a primary air supply below the nozzle plate, with an exhaust gas duct at the upper end of the combustion chamber, and with heat exchanger heating surfaces.
  • Stationary fluidized bed furnaces in which the air or. Gas velocity is chosen so that there is an upper limit for the fluidized bed, and circulating fluidized bed firing, in which the air or gas velocity is chosen so high that a large part of the solid particles are discharged upwards from the fluidized bed, separated in cyclones and then either directly or returned to the fluidized bed via an ash cooler are known (VGB-Krafttechnikstechnik, issue 8, Aug. 1963, article: "Design and disposition of the thermal power station 1 of the Stadtwerke Duisburg AG with circulating, atmospheric fluidized bed combustion" by W. Wein).
  • Fluidized bed furnaces generally have the advantage that they can also burn fuels of poorer quality, such as waste materials, and that one can achieve desulphurization of the flue gases by adding lime during the combustion in the fluidized bed.
  • the circulating fluidized bed firing has the additional advantage that a longer residence time of the fuels and additives is achieved through the solids circulation, which has a positive effect on the burnout and desulfurization. As a result of a more complete conversion, a lower calcium to sulfur ratio can be achieved with the same desulfurization.
  • the circulating fluidized bed furnace has the disadvantage over the stationary fluidized bed furnace that the equipment complexity is much greater.
  • several cyclone stages are required to separate the solid particles carried along with the exhaust gas and to be recycled, and an ash cooler for maintaining the temperature in the fluidized bed is also required.
  • the object of the invention is to reduce the outlay in terms of apparatus compared to known systems for circulating fluidized bed combustion. This reduction in the outlay on equipment should not occur at the expense of SO z emission, NO x reduction and burnout.
  • the entrained solid particles are discharged radially from the rising fluidized bed by a strong rotary component of the fluidized bed around the axis of symmetry of the combustion chamber as a result of a cylindrical cross section of the combustion chamber that offers little resistance to a rotary flow and that on the outer circumference of the combustion chamber in the upper half of the combustion chamber wall tangentially opening secondary air nozzles, which also generate a downward jacket flow.
  • the ejected solid particles are transported along the inner wall of the combustion chamber back to the lower area of the combustion chamber. It is a particular advantage of this solution that lighter, largely burned solid particles in the boundary region of the downward jacket flow and the rising fluidized bed are introduced into the central fluidized bed rather than heavy solid particles which can be returned to the bottom of the nozzle.
  • a particularly advantageous construction results from the central fastening of a cylindrical body on the nozzle base.
  • a cylindrical body arranged centrally to the axis of symmetry of the combustion chamber and the fluidized bed, prevents the particles in the lower region of the fluidized bed from flowing radially into the center. This is important because only a small centrifugal force component is effective in the center of the fluidized bed along the axis of symmetry of the combustion chamber and therefore particles ascending along the axis of symmetry of the combustion chamber could escape with the exhaust gas through the exhaust duct.
  • This construction is also the prerequisite for a further embodiment of the invention.
  • this can be designed as a hollow body and connected to an air supply duct or connected to the primary air and at its top wear the end approximately tangential to its circumference and air nozzles oriented obliquely upwards. This makes it possible to transmit not only fresh air, but also additional torques or angular momentum in the center of the circulating fluidized bed and thereby improve the separation of the incompletely burned solid particles or additives from the exhaust gas of the combustion chamber.
  • secondary air is injected above the ring diaphragm.
  • An advantageous embodiment of the invention results when the secondary air nozzles are arranged in a ring on the upper calotte of the combustion chamber. From there, the secondary air can blow down along the wall of the combustion chamber.
  • the combustion chamber wall can be manufactured without significant breakthroughs.
  • the cooler secondary air flowing down also reduces the thermal load on the combustion chamber wall. It may be expedient to arrange the secondary air nozzles on the bottom of a chamber which surrounds the exhaust duct and is supplied with secondary air. It is advantageous to arrange inclined guide nozzles over the entire bottom of this chamber, via which the secondary air can blow downwards in a uniform and spiral manner.
  • the torque that can be transmitted to the fluidized bed can be effectively increased if, in an advantageous further development of the invention, the ring screen carries tangential secondary air nozzles opening into the inner clear opening of the ring screen.
  • the ring diaphragm can also be cooled via the secondary air.
  • FIG. 1 The arrangement of the combustion chamber 1 according to the invention with fluidized bed control in an energy conversion system 2 is shown schematically in FIG. 1. It can be seen in this representation that the hot exhaust gases leaving the combustion chamber 1 are passed through an exhaust gas duct 3 for steam generation into a heat exchanger system 4 and then into a filter system 5 for dedusting. Between the filter system 5 and the chimney 6 of the combustion chamber, an induced draft fan 7 is connected into the exhaust duct 3 in the exemplary embodiment.
  • the combustion chamber 1 is supplied with fuel to which lime has been added via a fuel feed channel 8.
  • fresh air is fed via an air compressor 9 via a flue gas compressor 10, which in the exemplary embodiment is removed from the flue gas duct 3 leading to the chimney.
  • the various air supply lines 11, 12 are connected to both the fresh air line 13 and the flue gas line 14.
  • throttle valves 19, 20, 21, 22 are switched on in branches 15, 16 of the supply line for the fresh air and branches 17, 18 of the supply line for the flue gas.
  • FIG. 2 shows a combustion chamber 110 according to the invention, cut in the longitudinal direction.
  • the combustion chamber has a cylindrical cross section. It is closed off at the lower end by a nozzle base 111. Air nozzles 112 are let into the bottom of the nozzle at a constant distance.
  • An air supply line 113 opens into the space below the nozzle base. The latter is connected to both a fresh air line 114 and a flue gas line 115. A specific fresh air / flue gas mixture can be set via adjustment devices 116, 117 installed in both lines.
  • a fuel supply channel 118 opens into the combustion chamber wall 119.
  • secondary air nozzles 120 to 127 arranged at 90 ° to one another on the circumference open in the combustion chamber wall. As FIG. 2 shows, these secondary air nozzles open tangentially and slightly inclined downwards in the combustion chamber. These secondary air nozzles 120 to 127, like the air supply line 113 to the nozzle base 111, are also connected to both the fresh air line 114 and the flue gas line 115. Here, too, adjusting devices 128, 129 are provided in the connecting lines for setting the fresh air / smoke mixture. Heat exchanger tubes 130 are attached to the combustion chamber and are connected to a water vapor circuit (not shown further here).
  • a fresh air / flue gas mixture is blown into the space 133 under the nozzle base 111 via the air supply line 113 connected to the fresh air and flue gas line.
  • This fresh air / flue gas mixture can be adjusted as required by the adjustment devices 116, 117 used in the fresh air line 114 and flue gas line 115.
  • This primary air flowing in through the air supply line 113 blows upward through the air nozzles 112 of the nozzle base 111 into the combustion chamber and thereby swirls up the fuel and lime particles supplied via the fuel and lime supply channel 118. Due to the rising primary air, these fuel particles are carried upwards, swirled and partially burned with the oxygen part of the primary air at the prevailing temperature.
  • the fluidized bed can also be subjected to a rotary movement about the axis of symmetry 131 of the combustion chamber.
  • the secondary air blowing obliquely tangentially downwards from the secondary air nozzles ensures the remaining burnout and conveys the fuel particles carried radially outwards along the outer wall of the combustion chamber in a spiral downwards and leaves them, mixed with the fuel and additives freshly flowing in from the fuel supply channel 118, above of the nozzle base 111 flow back into the active bed.
  • this secondary air hose circulating along the outer wall transmits an angular momentum to the upper part of the fluidized bed, which gradually pushes the solid particles outwards by centrifugal force. These finally get into the vicinity of the combustion chamber wall 119 and into the secondary air flow flowing down there in a spiral.
  • the resulting flue gas which is loaded with light ash particles, is discharged centrally from the combustion chamber upwards via the exhaust duct 132.
  • a nozzle (not shown here) can be oriented so that its air jet blows through the axis of symmetry 131 of the combustion chamber. As a result, the solid particles rising in this area are conveyed into the outer area of the fluidized bed and are thus fully covered by the rotary flow.
  • FIG. 4 shows another embodiment of a combustion chamber 134 according to the invention.
  • a nozzle base 135 in the lower region of the combustion chamber and an air supply line 137 opens into the space below the nozzle base 135.
  • a fuel supply duct 138 opens into the wall 139 of the Combustion chamber 134.
  • Secondary air nozzles 140 to 147 are arranged in different planes in the upper third of the combustion chamber, which are oriented tangentially to the combustion chamber wall 139 and slightly downwards.
  • a hollow cylindrical body 149 Aligned to the axis of symmetry 148 of the combustion chamber 134, a hollow cylindrical body 149 which is located up to almost in the middle of the combustion chamber 134 is mounted on the nozzle base 135.
  • This hollow cylindrical body is connected with its cavity to the space 136 below the nozzle base 135 and thus also to the air supply line 137. It is closed at its upper end. Directly below its upper end, however, bores 150 to 155 are left on its circumference, which are oriented essentially tangentially to the outer wall 156 of the hollow cylindrical body 149 and obliquely upwards.
  • the arrangement of the secondary air nozzles 140 to 147 in the combustion chamber wall and the bores 150 to 155 in the hollow cylindrical body can also be seen in FIG. 4.
  • the combustion chamber wall 139 carries heat exchanger tubes 158, which are part of a water steam circuit, not shown here.
  • the hollow cylindrical body 149 can also be provided on the inside in a manner not shown here with heat exchanger tubes through which it is cooled and which are connected to the water vapor circuit not shown here.
  • fuel particles supplied through the fuel supply channel 158 are also whirled up by the primary air blowing out of the air nozzles 157 of the nozzle base 135 and partially burn with the oxygen of the primary air at the temperatures prevailing there. The remaining burnout occurs with the secondary air.
  • This angular momentum is further amplified by the secondary air nozzles 140 to 147 which open tangentially into the combustion chamber and the secondary air flowing through them.
  • the heavier, not yet completely burned particles are gradually driven outwards and into the region of the secondary air flowing downwards in a spiral manner, as in the embodiment of FIGS. 1 and 2. With this, they are transported back together with the fuel particles flowing in via the fuel supply channel 138 into the lower part of the fluidized bed.
  • the hollow cylindrical body 149 also prevents fuel particles from rising along the axis of symmetry of the combustion chamber and thus not entering the downward rotating flow.
  • FIG. 6 shows a longitudinal section through the combustion chamber 1 of FIG. 1, shown enlarged.
  • the combustion chamber has a cylindrical cross section with a nozzle base 23 arranged in the lower region. Air nozzles 24 32 are let in at a constant distance from the latter.
  • the combustion chamber 1 is divided by an aperture 33.
  • the exhaust duct 3 is connected in the upper calotte of the combustion chamber.
  • the fuel supply channel 8 is embedded below the ring diaphragm 33 and above the nozzle base 23 in the outer wall of the combustion chamber.
  • Above the ring diaphragm 33 four secondary air nozzles 34 to 43, each offset by 90 ° from one another, are embedded in the outer wall 42 of the combustion chamber in the exemplary embodiment in three different levels. As the sectional view in FIG. 7 shows, these secondary air nozzles 34 to 43 are arranged tangentially to the outer wall 42 of the combustion chamber 1. In addition, they are inclined with respect to the horizontal, as shown in FIG.
  • the inflowing secondary air receives a swirl and flows downward along the outer wall of the combustion chamber in a spiral.
  • these secondary air nozzles are connected to both the fresh air line 13 and the flue gas line 14.
  • the ring screen has narrow slots 45, 46, 47, 48 which run around almost the entire circumference of the outer wall of the combustion chamber and which are only connected by narrow webs 49, 50, 51, 52 on which the ring screen is supported, are separated from each other.
  • Heat exchanger tubes 53 which are connected to a water-steam circuit, are welded onto the outer wall of the combustion chamber.
  • a fresh air / flue gas mixture flows in under the nozzle base 23 via the fresh air and flue gas lines 13, 14 and the compressors 9, 10 which are switched on in these lines.
  • An annular diaphragm 33 is provided in the upper region of the fluidized bed. This annular diaphragm creates space for a downward backflow between the fluidized bed and the outer wall 44 of the combustion chamber 1.
  • the secondary air nozzles 34 to 33 are supplied via a branch 16 of the fresh air line 13 and a branch 18 of the flue gas line with a gas mixture referred to here as secondary air, which contains a presettable amount of oxygen via the throttle valves 20, 22 which are switched into the branches.
  • This graded supply of oxygen enables a staged combustion to be achieved which has a reducing effect on the NO x emission in the presence of fuel nitrogen.
  • the retention time of the solid particles increases their residence time. As a result, the lime supplied with the fuel can be more completely reacted with the sulfur, which significantly reduces the sulfur dioxide content of the exhaust gas and the required Ca / S ratio.
  • FIGS. 8 and 9 show a longitudinal and cross-section through another combustion chamber 54 with fluidized bed combustion, which was further developed in some points compared to the exemplary embodiment in FIGS. 1 and 6.
  • a nozzle plate 55 is provided at the lower end of the combustion chamber 54, an annular screen 56 in the central region of the combustion chamber, a concentric exhaust gas duct 57 at the upper end of the combustion chamber and a fuel supply duct 58 directly above the nozzle plate 55.
  • the secondary air is supplied via an annular chamber 59 which is arranged at the upper end of the combustion chamber 54 and surrounds the exhaust duct 57 in an annular manner and which communicates with the interior of the combustion chamber 54 via inclined guide plates 60.
  • the ring diaphragm 56 carries an attachment 61 of the same inner diameter, in which tangential swirl nozzles 62, 63, 64, 65 are embedded.
  • a cylindrical jacket 66 is fastened in the combustion chamber below the ring diaphragm 56 and extends almost to the nozzle bottom 55 and between it and the outer wall 67 of the combustion chamber 54 there is a sufficiently wide annular gap for the transmission of the through the slots 68, 69 (only two visible) leaves the ring diaphragm 56 returned particles in the lower region of the fluidized bed.
  • This jacket 66 is so far excluded in the area of the fuel feed channel 58 that it does not hinder the fuel feed.
  • all the air nozzles 70 to 78 are inclined symmetrically to the axis of symmetry 79 of the combustion chamber 54 by the same angle with respect to the vertical in the direction of the angular momentum to be transmitted to the fluidized bed.
  • the air nozzles 70, 71 arranged in the edge region of the nozzle base are positioned obliquely inwards.
  • further substantially radially inwardly blowing air nozzles 80, 81 are provided directly below the mouth of the jacket 66 attached to the ring diaphragm.
  • the swirl nozzles 62 to 65 in the ring diaphragm 56 and the air nozzles 80, 81 in the combustion chamber wall immediately above the nozzle base are, as shown in FIG. 1, connected to both the fresh air line 13 and the flue gas line 14.
  • the individual nozzle groups can be acted upon differently via the individual branches 15 to 18 of the secondary air lines shown in FIG. 1 and adjustable throttle valves 19 to 22.
  • FIG. 9 shows that the individual branches 82 of the secondary air supply line 12 open tangentially into the annular chamber 59. This creates a swirl which only needs to be deflected downwards somewhat by the inclined baffles 60 arranged at the bottom of the annular chamber.
  • FIG. 9 also clearly shows the opening of the ring diaphragm 56 underneath with the swirl nozzles 62 to 65 placed on the ring diaphragm and also tangentially opening into the central opening of the ring diaphragm.
  • FIG. 6 shows an enlarged section of the outer wall 67 of the combustion chamber 54 and of the jacket 66 attached to the ring diaphragm 56.
  • the design of the walls can be seen here as a gas-tight welded fin tube wall.
  • an oxygen gas content which can be set in the air supply line 11 is conveyed via the fresh air compressor 9 and the compressor 10 in the flue gas line 14 and the throttle valves 19 to 22.
  • This air-gas mixture emerges from the air nozzles in the nozzle bottom 55 of the combustion chamber and at the lower end of the outer wall and generates an upward spiral flow in the combustion chamber.
  • the milled fuel introduced via the fuel supply channel 58 and mixed with lime in accordance with its sulfur content is pulled up by this air flow, finely distributed and burns in the fluidized bed.
  • This fluidized bed is formed by the ring diaphragm 56 in the upper part of the combustion chamber 54 narrowed to a smaller cross section.
  • the tube walls of the combustion chamber 54 as well as of the jacket 66 can, as shown in FIG. 10, be designed as fin tube walls and be used as heating surfaces. It is a great advantage of this construction that the outer wall 67 of the combustion chamber 54 is also protected from the direct action of the fluidized bed by the jacket 66 and the cooler secondary air flowing down the wall. A further advantage of this construction is that the return of solids from the upper region of the combustion chamber 54 to the lower regions of the fluidized bed gives a longer dwell time for the individual particles of the fluidized bed, which improves the burnout and the incorporation of sulfur into the lime supplied with the fuel becomes. In this way, one can get by with less lime addition for a given sulfur content of the fuel.
  • a graded combustion that is to say combustion with an initially reducing atmosphere
  • This combustion chamber also avoids the cyclone stages and ash coolers that are otherwise required for circulating fluidized bed combustion, because the cooling of the ashes can be achieved by adding colder, recirculated flue gases.
  • a good degree of separation for solid particles is achieved, so that no further cyclone stages are required.
  • the heat radiation losses are also greatly reduced in comparison to a system with circulating fluidized bed combustion, two cyclone stages and an ash cooler and the hot lines connecting them. Due to the cylindrical shape of the combustion chamber, it can also be upgraded for operation with a charged fluidized bed. The fin tube walls of the combustion chamber can be easily incorporated into a steam cycle.
  • FIG. 11 shows a further embodiment of a combustion chamber 84 with fluidized bed combustion.
  • this combustion chamber 84 is the exhaust gas duct 85 and the secondary air nozzles 86 to 94 are embedded in the outer wall 95 of the combustion chamber in exactly the same way as was described with reference to FIGS. 6 and 7.
  • the ring diaphragm 96 is designed as an annular channel for the secondary air and carries on its inner diameter tangential nozzles 97, 98, 99 (only three shown) which are oriented tangentially to the inner cross section.
  • the diameter of the jacket 100 arranged below the ring diaphragm 97 has been reduced in comparison to the exemplary embodiment in FIGS.
  • this embodiment of the combustion chamber 84 has the advantage that less cold flue gas has to be returned for maintaining the temperature in the fluidized bed, since heat is applied to the heat exchanger tubes arranged between the jacket 100 and the outer wall 95 101 is discharged.
EP86106354A 1985-05-23 1986-05-09 Chambre de combustion pour un appareil à combustion à lit fluidisé Ceased EP0204176A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3518628 1985-05-23
DE3518628 1985-05-23
DE3544887 1985-12-18
DE19853544887 DE3544887A1 (de) 1985-12-18 1985-12-18 Brennkammer fuer eine wirbelschichtfeuerung

Publications (2)

Publication Number Publication Date
EP0204176A2 true EP0204176A2 (fr) 1986-12-10
EP0204176A3 EP0204176A3 (fr) 1988-01-20

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Application Number Title Priority Date Filing Date
EP86106354A Ceased EP0204176A3 (fr) 1985-05-23 1986-05-09 Chambre de combustion pour un appareil à combustion à lit fluidisé

Country Status (6)

Country Link
US (1) US4766851A (fr)
EP (1) EP0204176A3 (fr)
CN (1) CN1010425B (fr)
DK (1) DK235886A (fr)
ES (1) ES8704254A1 (fr)
GR (1) GR861315B (fr)

Cited By (7)

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EP0243156A1 (fr) * 1986-04-23 1987-10-28 BURMEISTER & WAIN ENERGI A/S Réacteur à lit fluidisé
EP0282777A2 (fr) * 1987-03-18 1988-09-21 L. & C. Steinmüller GmbH Procédé de combustion d'une matière contenant du carbone dans un four à lit fluidisé et dispositif de mise en oeuvre du procédé
EP0286845A1 (fr) * 1987-04-15 1988-10-19 Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft Procédé de combustion de lignite salin
DE3729910A1 (de) * 1987-09-07 1989-03-16 Steinmueller Gmbh L & C Druckaufgeladen betreibbare wirbelschichtfeuerung
WO1989005942A1 (fr) * 1986-06-12 1989-06-29 Götaverken Energy Aktiebolag Procede et reacteur pour la combustion en lit fluidise
EP0413104A1 (fr) * 1989-06-16 1991-02-20 Ebara Corporation Procédé pour le réglage de la combustion dans un chauffage
US6646700B2 (en) 2000-11-24 2003-11-11 Agfa-Gevaert Monochrome liquid crystal display device utilizing a color filter for changing the spectrum of light emitted from a liquid crystal panel

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DE3814314C1 (fr) * 1988-04-28 1989-06-22 Deutsche Babcock Werke Ag, 4200 Oberhausen, De
DE4007635C1 (fr) * 1990-03-10 1991-09-19 Vereinigte Kesselwerke Ag, 4000 Duesseldorf, De
FI91800C (sv) * 1991-09-12 1994-08-10 Imatran Voima Oy Förfarande och anordning vid avkylning av cirkulationsmassan i en svävväddspanna
JP2985474B2 (ja) 1992-01-20 1999-11-29 石川島播磨重工業株式会社 流動層ボイラ
US5394937A (en) * 1993-03-05 1995-03-07 Nieh; Sen Vortex heat exchange method and device
CN1041286C (zh) * 1993-06-24 1998-12-23 北京化工学院 内循环式气固流化床
US5339774A (en) * 1993-07-06 1994-08-23 Foster Wheeler Energy Corporation Fluidized bed steam generation system and method of using recycled flue gases to assist in passing loopseal solids
US5951277A (en) * 1996-11-01 1999-09-14 The Robert L. Parham Trust Refractory hood for circulating fluidized bed
US6269755B1 (en) 1998-08-03 2001-08-07 Independent Stave Company, Inc. Burners with high turndown ratio
WO2001044719A1 (fr) * 1999-12-16 2001-06-21 Livite Oy Procede brulage de materiau dans une chaudiere a lit fluidise et chaudiere a lit fluidise
WO2002090829A1 (fr) * 2001-05-09 2002-11-14 Fortum Oyj Procede et arrangement pour la reduction des emissions d'oxyde d'azote en combustion sur lit fluidise
US7410356B2 (en) 2005-11-17 2008-08-12 Mobotec Usa, Inc. Circulating fluidized bed boiler having improved reactant utilization
US20090056600A1 (en) * 2007-08-30 2009-03-05 Suncue Company Ltd Furnace
US8069824B2 (en) * 2008-06-19 2011-12-06 Nalco Mobotec, Inc. Circulating fluidized bed boiler and method of operation
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EP0243156A1 (fr) * 1986-04-23 1987-10-28 BURMEISTER & WAIN ENERGI A/S Réacteur à lit fluidisé
WO1989005942A1 (fr) * 1986-06-12 1989-06-29 Götaverken Energy Aktiebolag Procede et reacteur pour la combustion en lit fluidise
EP0282777A2 (fr) * 1987-03-18 1988-09-21 L. & C. Steinmüller GmbH Procédé de combustion d'une matière contenant du carbone dans un four à lit fluidisé et dispositif de mise en oeuvre du procédé
DE3708799A1 (de) * 1987-03-18 1988-09-29 Steinmueller Gmbh L & C Verfahren zum verbrennen von kohlenstoffhaltigem material in einer wirbelschichtfeuerung und vorrichtung zur durchfuehrung des verfahrens
EP0282777A3 (fr) * 1987-03-18 1988-11-02 L. & C. Steinmüller GmbH Procédé de combustion d'une matière contenant du carbone dans un four à lit fluidisé et dispositif de mise en oeuvre du procédé
EP0286845A1 (fr) * 1987-04-15 1988-10-19 Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft Procédé de combustion de lignite salin
DE3729910A1 (de) * 1987-09-07 1989-03-16 Steinmueller Gmbh L & C Druckaufgeladen betreibbare wirbelschichtfeuerung
EP0413104A1 (fr) * 1989-06-16 1991-02-20 Ebara Corporation Procédé pour le réglage de la combustion dans un chauffage
US5044287A (en) * 1989-06-16 1991-09-03 Ebara Corporation Method of controlling combustion in a fluidized bed furnace
US6646700B2 (en) 2000-11-24 2003-11-11 Agfa-Gevaert Monochrome liquid crystal display device utilizing a color filter for changing the spectrum of light emitted from a liquid crystal panel

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DK235886A (da) 1986-11-24
DK235886D0 (da) 1986-05-21
CN1010425B (zh) 1990-11-14
GR861315B (en) 1986-09-19
CN86102820A (zh) 1986-12-17
ES8704254A1 (es) 1987-03-16
ES555286A0 (es) 1987-03-16
EP0204176A3 (fr) 1988-01-20
US4766851A (en) 1988-08-30

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