US20150267968A1 - Fluidized bed heat exchanger - Google Patents

Fluidized bed heat exchanger Download PDF

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Publication number
US20150267968A1
US20150267968A1 US14/433,885 US201314433885A US2015267968A1 US 20150267968 A1 US20150267968 A1 US 20150267968A1 US 201314433885 A US201314433885 A US 201314433885A US 2015267968 A1 US2015267968 A1 US 2015267968A1
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US
United States
Prior art keywords
heat exchanger
fluidized bed
partition wall
wall
section
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.)
Abandoned
Application number
US14/433,885
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English (en)
Inventor
Ossi Sippu
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.)
Amec Foster Wheeler Energia Oy
Original Assignee
Amec 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 Amec Foster Wheeler Energia Oy filed Critical Amec Foster Wheeler Energia Oy
Assigned to AMEC FOSTER WHEELER ENERGIA OY reassignment AMEC FOSTER WHEELER ENERGIA OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SIPPU, OSSI
Publication of US20150267968A1 publication Critical patent/US20150267968A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1836—Heating and cooling the reactor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D13/00—Heat-exchange apparatus using a fluidised bed
    • 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/005—Fluidised bed combustion apparatus comprising two or more beds
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
    • B01J2208/00141—Coils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
    • B01J2208/00194—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
    • 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
    • F23C2206/103—Cooling recirculating particles
    • 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/10008—Special arrangements of return flow seal valve in fluidized bed combustors

Definitions

  • the present invention relates to a fluidized bed heat exchanger of a fluidized bed boiler.
  • the invention especially relates to a fluidized bed heat exchanger comprising a front wall adjacent to the fluidized bed boiler, a rear wall opposite to the front wall, and two side walls, the walls being formed as water tube panels, an inlet opening arranged in a first section of an upper portion of the heat exchanger for introducing hot particles from the fluidized bed boiler to the heat exchanger, heat exchange surfaces arranged in the heat exchanger for recovering heat from the particles, and an outlet opening arranged in a second section of the upper portion of the heat exchanger for returning cooled particles as an overflow from the heat exchanger back to the fluidized bed boiler, wherein the heat exchanger comprises a partition wall between the first and second sections of the upper portion of the heat exchanger.
  • Basic requirements or desired properties of a heat exchanger include that a sufficient amount of heat can be recovered in the heat exchanger, that the amount of recovered heat can be controlled as desired, that the heat exchanger can be used continuously without problems, and that the operation of the heat exchanger does not harm the processes in the boiler, for example, by increasing the emissions to the environment.
  • U.S. Pat. No. 7,240,639 discloses a circulating fluidized bed boiler with a fluidized bed heat exchanger that is especially advantageous for efficient control of the recovered heat. It comprises an inlet opening for introducing hot solid particles directly from the furnace and from the particle separator of the boiler to the top of the heat exchanger. A portion of the particles is cooled in heat exchange surfaces and discharged through a lift channel from the bottom of the heat exchanger back to the furnace. Another portion of the particles can, especially at high loads, be discharged without cooling to the furnace as an overflow through another opening and a discharge channel.
  • a disadvantage of this construction is that the existence of a lift channel adjacent to the furnace tends to move the center of gravity of the heat exchanger further away from the furnace, which makes the supporting of the heat exchanger more difficult.
  • a cooled partition wall is generally a better solution in terms of endurance or heat balance of the construction.
  • a cooled partition wall close to an adjacent wall can advantageously be constructed by bending a portion of water tubes out from the adjacent wall to run along the partition wall, parallel to the water tubes of the adjacent wall, to be finally bent back to the adjacent wall.
  • a construction in which solid particles are conveyed to or from a heat exchanger along a channel may, especially at high loads, create a situation in which a portion of hot solid particles entering towards the heat exchanger cannot flow through the heat exchanger, but they are let to bypass the heat exchanger and return to the furnace uncooled. Therefore, in order to recover enough energy, the heat exchanger and the heat transfer surfaces have to be made relatively large to increase the residence time of the particles in the heat exchanger so as to cool the particles to a relatively low temperature.
  • a large heat exchanger requires a large space and makes the supporting arrangement more difficult.
  • a relatively low temperature in the heat exchanger may, in some cases, lead to unwanted chemical reactions. Especially, in oxyfuel combustion, in which the partial pressure of CO 2 is high, a temperature that is too low may lead to recarbonation of CaO in the heat exchanger.
  • An object of the present invention is to provide a fluidized bed heat exchanger of a fluidized bed boiler in which at least some of the problems mentioned above are minimized.
  • the partition wall extends to a center section of the heat exchanger
  • the partition wall extends to a portion of the heat exchanger that is approximately at an equal distance from the front wall and from the rear wall. Therefore, the partition wall is not arranged adjacent to a front wall or a rear wall, but it is directed from the front wall to a center section of the heat exchanger.
  • the partition wall extends from the front wall up to a portion of the heat exchanger that is spaced apart from the front wall and the rear wall by about 30% to about 70%, even more preferably, about 40% to about 60%, of the total depth of the heat exchanger, i.e., from the distance between the rear wall and the front wall.
  • the particles are discharged from the heat exchanger directly from the top of the main fluidized bed, i.e., of the fluidized bed in which the heat exchange surfaces are arranged.
  • the outlet of the heat exchanger does not comprise a lifting channel in which particles are discharged upwards from the bottom of the heat exchanger.
  • the fluidized bed of the heat exchanger is undivided.
  • there is no partition wall for example, a vertical partition wall, dividing an essential portion of the portion of the fluidized bed in which the heat exchange surfaces are arranged into two sections.
  • the particle flow through the heat exchanger can be, by utilizing the features of the present construction described above, easily designed such as to render possible a relatively high particle flow, in practice, any desired heat recovery rate can be obtained without cooling the particles to a very low temperature in the heat exchanger. Therefore, the heat exchanger can be made relatively small. Moreover, due to the low level of cooling, the risk of unwanted chemical reactions, especially, in oxyfuel combustion, is minimized.
  • the partition wall is, as seen from the front wall, slanted downwards, so as to guide particles introduced into the heat exchanger closer to the rear wall, further away from the furnace.
  • particles introduced towards the heat exchanger at any location at the top surface of the heat exchanger are guided to the rear portion of the heat exchanger.
  • the particles are discharged from the heat exchanger through an outlet opening in the front wall, and, therefore, they proceed in the fluidized bed of the heat exchanger horizontally towards the front wall.
  • the present construction provides an efficient means for controlling, for example, the temperature of superheated or reheated steam.
  • the heat exchange surfaces are arranged below the vertical level of the lower edge of the outlet opening. Because the lower edge of the outlet opening defines the vertical level of the top surface of the fluidized bed forming in the heat exchanger, the construction provides the advantage that the heat exchange surfaces are always in use embedded in the fluidized bed.
  • the lower end of the partition wall is approximately at the same vertical level as, even more preferably, at a slightly lower vertical level than, the lower edge of the outlet opening. This is advantageous, because, if the lower end of the partition wall would be at a higher level than the lower edge of the outlet opening, there would be a possibility that particles could float on the surface of the fluidized bed directly from the inlet to the outlet without cooling in the heat exchange surfaces.
  • the lower end of the partition wall is at most 0.2 m, even more preferably, at most 0.1 m, below the vertical level of the lower edge of the outlet opening.
  • a windbox is arranged below the heat exchanger, which windbox is divided into a first section, which is mainly below the partition wall, and a second section, which is mainly not below the partition wall.
  • the portions of the fluidized bed above the first section and the second section of the windbox can thus be called an outlet side and an inlet side of the fluidized bed, respectively.
  • a divided windbox renders it possible to have a different fluidizing velocity on the inlet side and the outlet side of the fluidized bed.
  • a slightly higher fluidizing velocity is used on the outlet side of the fluidizing bed than on the inlet side of the fluidized bed, in order to enhance the circulation of particles in the fluidized bed.
  • FIG. 1 is a schematic vertical cross section of a heat exchanger according to an embodiment of the present invention.
  • FIG. 2 is a schematic vertical cross section of side wall tubes forming a partition wall in a heat exchanger according to an embodiment of the present invention.
  • FIG. 1 schematically shows a heat exchanger 10 connected to a furnace 12 of a fluidized bed boiler.
  • the heat exchanger 10 is enclosed by a front wall 16 , a rear wall 18 , and two side walls. Particles are introduced into the heat exchanger 10 through an opening 20 in the front wall and through the lower end of a channel 22 returning particles from a particle separator (not shown).
  • the opening 20 in the front wall 16 and the lower end of the channel 22 can be said to commonly form the inlet opening 24 of the heat exchanger.
  • the inlet opening 20 of the heat exchanger 10 can be formed, for example, solely of one or more openings in the front wall 16 , or solely of the lower end of one or more channels returning particles from a particle separator (not shown).
  • a particle separator not shown
  • at least a portion of the particles introduced to the heat exchanger 10 via the inlet opening 24 is guided by a slanted partition wall 26 from the front wall 16 side of the heat exchanger 10 towards a rear wall 18 side of the heat exchanger 10 .
  • a bed of particles 28 fluidized by fluidizing gas introduced to the heat exchanger 10 through a windbox 30 and nozzles 32 is formed in the lower portion of the heat exchanger 10 .
  • Heat exchange surfaces 34 are arranged in the lower portion of the heat exchanger 10 for recovering heat from the particles. After cooling on the heat exchange surfaces 34 , the particles are discharged from the heat exchanger 10 back to the furnace 12 as an overflow through an outlet opening 36 in the front wall 16 .
  • the outlet opening 36 is located in the upper portion of the heat exchanger 10 .
  • the partition wall 26 divides the upper portion of the heat exchanger 10 into a first section 38 comprising the inlet opening 24 , and a second section 40 comprising the outlet opening 36 .
  • the heat exchange surfaces 34 are advantageously arranged below the vertical level of the lower edge 42 of the outlet opening 36 .
  • the partition wall 26 has a lower end 44 approximately at the same vertical level as the lower edge 42 of the outlet opening 36 .
  • the lower end 44 of the partition wall 26 is at a vertical level within 0.2 m, even more preferably, within 0.1 m, from that of the lower edge 42 of the outlet opening 36 .
  • the lower end 44 of the partition wall 26 is advantageously at a vertical level slightly below the vertical level of the lower edge 42 of the outlet opening 36 .
  • the partition wall 26 advantageously extends from the front wall 16 downwards in an angle of about forty-five degrees, preferably, between thirty and sixty degrees, even more preferably, between forty and fifty degrees, from horizontal, to a center section of the heat exchanger 10 .
  • the lower end 44 of the partition wall 26 is advantageously approximately as far from the front wall 16 and the rear wall 18 .
  • the lower end 44 of the partition wall 26 is in a horizontal cross section spaced apart from the front wall 16 by about 30% to about 70%, even more preferably, by about 40% to about 60%, of the distance between the rear wall 18 and the front wall 16 .
  • the front wall 16 of the heat exchanger 10 is preferably a common wall with the furnace 12 .
  • the front wall 16 is in FIG. 1 slanted due to the shape of the lower section of the furnace 12 , but it may in other embodiments be, for example, vertical.
  • the front wall 16 is thus formed as a water tube panel, i.e., as a tube-fin-tube construction, of mainly vertical water tubes 46 leading water from a lower header 48 to an upper header (not shown in FIG. 1 ).
  • Inlet opening 24 and outlet opening 36 of the heat exchanger 10 are preferably formed in the front wall 16 by bending some water tubes 46 ′ out from the water tube panel.
  • the outlet opening 36 may be equipped by a chute-like construction 50 , to guide particles from the heat exchanger 10 and to prevent particles from entering from the furnace 12 through the outlet opening 36 to the heat exchanger 10 .
  • the side walls of the heat exchanger 10 are preferably formed as a water tube panel, i.e., as a tube-fin-tube construction, of mainly vertical water tubes leading water from a lower header 52 to an upper header (not shown in the Figures).
  • the partition wall 26 is preferably formed of water tubes 54 covered by a layer of refractory 56 .
  • the partition wall 26 is formed by bending water tubes from at least one side wall, preferably, from two side walls, of the heat exchanger 10 . Thereby, the forming of the partition wall does not weaken or complicate the arrangement of water tubes in the front wall 16 .
  • the windbox 30 below the heat exchanger 10 is divided into a first section 30 that is mainly not below the partition wall 26 and a second section 30 ′ that is mainly below the partition wall 26 .
  • FIG. 2 shows, in a vertical cross section, lower headers 52 , 52 ′ and vertical water tubes 58 , 58 ′ of the side walls 60 , 60 ′.
  • the water tubes 58 , 58 ′ are bent to form a first horizontal section 62 , 62 ′ towards the center section 64 of the partition wall 26 .
  • the water tubes are bent back to form a second horizontal section 66 , 66 ′ from the center section 64 back to the side walls 60 , 60 ′.
  • the first horizontal section 62 , 62 ′ of each water tube is directly below the second horizontal section 66 , 66 ′ of the same tube.
  • the water tubes are again bent up to continue as vertical water tubes.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
US14/433,885 2012-10-11 2013-10-09 Fluidized bed heat exchanger Abandoned US20150267968A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20126064A FI125773B (en) 2012-10-11 2012-10-11 LEIJUPETILÄMMÖNVAIHDIN
FI20126064 2012-10-11
PCT/FI2013/050975 WO2014057173A1 (en) 2012-10-11 2013-10-09 Fluidized bed heat exchanger

Publications (1)

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US20150267968A1 true US20150267968A1 (en) 2015-09-24

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ID=49552385

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US14/433,885 Abandoned US20150267968A1 (en) 2012-10-11 2013-10-09 Fluidized bed heat exchanger

Country Status (11)

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US (1) US20150267968A1 (pl)
EP (1) EP2906874B1 (pl)
JP (1) JP5844021B1 (pl)
KR (2) KR20150067306A (pl)
CN (1) CN104755839B (pl)
FI (1) FI125773B (pl)
HU (1) HUE048013T2 (pl)
PL (1) PL2906874T3 (pl)
RU (1) RU2599888C1 (pl)
WO (1) WO2014057173A1 (pl)
ZA (1) ZA201502432B (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105570860A (zh) * 2015-12-18 2016-05-11 南通万达锅炉有限公司 带床温调节系统的专用生物质颗粒流化床锅炉

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949099A (en) * 1958-04-21 1960-08-16 Riley Stoker Corp Fly ash separation
US4896717A (en) * 1987-09-24 1990-01-30 Campbell Jr Walter R Fluidized bed reactor having an integrated recycle heat exchanger
US5299532A (en) * 1992-11-13 1994-04-05 Foster Wheeler Energy Corporation Fluidized bed combustion system and method having multiple furnace and recycle sections
US5533471A (en) * 1994-08-17 1996-07-09 A. Ahlstrom Corporation fluidized bed reactor and method of operation thereof
US5601039A (en) * 1992-05-21 1997-02-11 Foster Wheeler Energia Oy Method and apparatus for providing a gas seal in a return duct and/or controlling the circulating mass flow in a circulating fluidized bed reactor
US6336500B2 (en) * 1996-06-27 2002-01-08 Foster Wheeler Energia Oy Method and apparatus for controlling heat transfer from solids particles in a fluidized bed
US20060000425A1 (en) * 2004-07-01 2006-01-05 Kvaerner Power Oy Circulating fluidized bed boiler

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NL7801388A (nl) * 1977-03-03 1978-09-05 Erk Eckrohrkessel Oven met gefluidiseerde laag en voorzien van een inrichting voor het uit deze gefluidiseerde laag afvoeren van de warmte.
JPS56138602A (en) * 1980-03-31 1981-10-29 Babcock Hitachi Kk Cylindrical tubular boiler of fluidized bed furnace with external dust collector
JPS58164902A (ja) * 1982-03-23 1983-09-29 川崎重工業株式会社 流動床式再熱ボイラ
JP3030511B2 (ja) * 1990-10-05 2000-04-10 バブコツク日立株式会社 ボイラ装置及びその運転方法
US5526775A (en) 1994-10-12 1996-06-18 Foster Wheeler Energia Oy Circulating fluidized bed reactor and method of operating the same
RU6870U1 (ru) * 1997-08-26 1998-06-16 ОАО "Уралэнергоцветмет" Водотрубный котел
FI107758B (fi) * 1999-11-10 2001-09-28 Foster Wheeler Energia Oy Kiertoleijureaktori
US6237541B1 (en) * 2000-04-19 2001-05-29 Kvaerner Pulping Oy Process chamber in connection with a circulating fluidized bed reactor
JP2002243109A (ja) * 2001-02-21 2002-08-28 Chugoku Electric Power Co Inc:The 流動層ボイラ装置とその運転方法
US20040100902A1 (en) * 2002-11-27 2004-05-27 Pannalal Vimalchand Gas treatment apparatus and method
FI114115B (fi) 2003-04-15 2004-08-13 Foster Wheeler Energia Oy Menetelmä ja laite lämmön talteenottamiseksi leijupetireaktorissa
CN102563633B (zh) * 2010-12-31 2015-07-01 贵州中烟工业有限责任公司 循环流化床锅炉返料器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949099A (en) * 1958-04-21 1960-08-16 Riley Stoker Corp Fly ash separation
US4896717A (en) * 1987-09-24 1990-01-30 Campbell Jr Walter R Fluidized bed reactor having an integrated recycle heat exchanger
US5601039A (en) * 1992-05-21 1997-02-11 Foster Wheeler Energia Oy Method and apparatus for providing a gas seal in a return duct and/or controlling the circulating mass flow in a circulating fluidized bed reactor
US5299532A (en) * 1992-11-13 1994-04-05 Foster Wheeler Energy Corporation Fluidized bed combustion system and method having multiple furnace and recycle sections
US5533471A (en) * 1994-08-17 1996-07-09 A. Ahlstrom Corporation fluidized bed reactor and method of operation thereof
US6336500B2 (en) * 1996-06-27 2002-01-08 Foster Wheeler Energia Oy Method and apparatus for controlling heat transfer from solids particles in a fluidized bed
US20060000425A1 (en) * 2004-07-01 2006-01-05 Kvaerner Power Oy Circulating fluidized bed boiler

Also Published As

Publication number Publication date
CN104755839B (zh) 2017-02-22
HUE048013T2 (hu) 2020-05-28
ZA201502432B (en) 2016-02-24
JP5844021B1 (ja) 2016-01-13
PL2906874T3 (pl) 2020-06-29
EP2906874A1 (en) 2015-08-19
WO2014057173A1 (en) 2014-04-17
RU2599888C1 (ru) 2016-10-20
EP2906874B1 (en) 2019-12-04
KR102121648B1 (ko) 2020-06-29
KR20170092704A (ko) 2017-08-11
JP2016500803A (ja) 2016-01-14
CN104755839A (zh) 2015-07-01
FI125773B (en) 2016-02-15
KR20150067306A (ko) 2015-06-17
FI20126064A (fi) 2014-04-12

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