公开(公告)号：FI131442B1

公开(公告)日：2025-04-23

申请号：FI20235246

申请日：2023-02-28

Applicant: VALMET TECHNOLOGIES OY

Inventor： LEHTONEN PEKKA ,  LUOMAHARJU TERO ,  YLI-HEMMINKI PASI

IPC: F28D13/00 ,  F22B31/00 ,  F27B15/02

Abstract: A wall (200) for a fluidized bed boiler (300). The wall (200) comprises a first heat exchanger pipe (110) comprising a first primary portion (111) and a first secondary portion (112), and a second heat exchanger pipe (120) comprising a second primary portion (121) and a second secondary portion (122). A first gap (221) is arranged between the first secondary portion (112) and the second secondary portion (122), and at least a part of the first secondary portion (112) and at least a part of the second secondary portion (122) extend straight, in parallel, and within an imaginable plane (P). The wall (200) is configured such that particulate material is able to propagate through the first gap (221) from a first side (S1) of the plane (P) to the opposite second side (S2) of the plane (P). The wall (200) comprises a refractory (230) arranged on at least one side of a part of the first secondary portion (112) and a part of the second secondary portion (122). A fluidized bed boiler comprising the wall (200).

公开(公告)号：ES2884109T3

公开(公告)日：2021-12-10

申请号：ES16920727

申请日：2016-11-01

Applicant: VALMET TECHNOLOGIES OY

Inventor： LEHTONEN PEKKA

IPC: F23C10/26 ,  F22B31/00 ,  F22B37/10 ,  F23C10/06

Abstract: Caldera de lecho fluidizado circulante (1), que comprende - un horno (50), - un ciclón (40) para separar material de lecho de gases, - un sello de bucle (5), y - un intercambiador de calor de sello de bucle (10) dispuesto en el sello de bucle (5), comprendiendo el intercambiador de calor de sello de bucle (10) - paredes (500, 505, 507, 510, 520, 530, 540, 550, 560) que limitan un interior (11) del intercambiador de calor de sello de bucle (10), - una primera salida de partículas (590) para permitir la salida de material en partículas desde el intercambiador de calor de sello de bucle (10), - una entrada (31) para recibir material de lecho desde el horno (50) a través del ciclón (40), - tubos de intercambiador de calor (810, 820, 830) dispuestos en el interior (11) del intercambiador de calor de sello de bucle (10), y - un primer canal de eliminación de ceniza (211, 421) configurado para permitir la salida de ceniza desde el intercambiador de calor de sello de bucle (10), en donde - el primer canal de eliminación de ceniza (211, 421) está dispuesto a un nivel más bajo que la primera salida de partículas (590) y las paredes (500) limitan - un primer compartimento (21) que comprende la entrada (31) para recibir material de lecho y - un segundo compartimento (22) que comprende los tubos de intercambiador de calor (820), en donde - una primera pared (510) de las paredes (500) separa el primer compartimento (21) del segundo compartimento (22) y limita un primer canal (512) para transportar material de lecho desde el primer compartimento (21) al segundo compartimento (22), - el primer canal de eliminación de ceniza (211) está configurado para permitir la salida de ceniza desde el primer compartimento (21) o el segundo compartimento (22), y la caldera de lecho fluidizado circulante (1) comprende - un enfriador de ceniza (600) configurado para recibir ceniza desde el primer canal de eliminación de ceniza (211, 421) de manera que la ceniza no es transportada a través del horno (50) desde el intercambiador de calor de sello de bucle (10) al enfriador de ceniza (600).

公开(公告)号：DK3535523T3

公开(公告)日：2021-08-16

申请号：DK16920727

申请日：2016-11-01

Applicant: VALMET TECHNOLOGIES OY

Inventor： LEHTONEN PEKKA

IPC: F23C10/26 ,  F22B31/00 ,  F22B37/10 ,  F23C10/06

公开(公告)号：CA3084516A1

公开(公告)日：2019-06-27

申请号：CA3084516

申请日：2018-12-12

Applicant: VALMET TECHNOLOGIES OY

Inventor： LEHTONEN PEKKA ,  HEINO TERO

IPC: F22B31/00 ,  F23C10/04 ,  F23C10/06 ,  F23C10/10

Abstract: A circulating fluidized bed boiler (1), comprising a furnace (50), a loopseal (5), and a loopseal heat exchanger (10) arranged in the loopseal (5). The loopseal heat exchanger (10) comprises at least an inlet chamber (100), a bypass chamber (200), and a first heat exchange chamber (310), heat exchanger pipes (810) arranged in the first heat exchange chamber (310), and a primary particle outlet (610) for letting out bed material from the first heat exchange chamber (310). The primary particle outlet (610) has at least a first part (611) and a second part (612) separated from each other by a barrier element (401) in such a way that the first part (611) of the primary particle outlet (610) has a first height (h1) and a first width (w1), wherein a ratio (h1/w1) of the first height (h1) to the first width (w1) is less than 0.5 or more than 2. Use of the circulating fluidized bed boiler (1) such that fluidizing gas and bed material are let out from the first heat exchange chamber (310) via the primary particle outlet (610).

公开(公告)号：PL4248131T3

公开(公告)日：2024-11-25

申请号：PL21816117

申请日：2021-11-02

Applicant: VALMET TECHNOLOGIES OY

Inventor： HILJANEN JUHA ,  LEHTONEN PEKKA ,  TAPIAINEN PERTTI ,  VARONEN MIKKO

IPC: F22B31/04 ,  F22B31/00

公开(公告)号：FI129147B

公开(公告)日：2021-08-13

申请号：FI20176134

申请日：2017-12-19

Applicant: VALMET TECHNOLOGIES OY

Inventor： HEINO TERO ,  LEHTONEN PEKKA

IPC: F23C10/32 ,  F22B31/00 ,  F23C10/06 ,  F23C10/26

Abstract: A circulating fluidized bed boiler (1), comprising a furnace (50), a loopseal (5), and a loopseal heat exchanger (10) arranged in the loopseal (5). The loopseal heat exchanger (10) comprises at least an inlet chamber (100), a bypass chamber (200), and a first heat exchange chamber (310), heat exchanger pipes (810) arranged in the first heat exchange chamber (310), and a primary particle outlet (610) for letting out bed material from the first heat exchange chamber (310). The primary particle outlet (610) has at least a first part (611) and a second part (612) separated from each other by a barrier element (401) in such a way that the first part (611) of the primary particle outlet (610) has a first height (h1) and a first width (w1), wherein a ratio (h1/w1) of the first height (h1) to the first width (w1) is less than 0.5 or more than 2. Use of the circulating fluidized bed boiler (1) such that fluidizing gas and bed material are let out from the first heat exchange chamber (310) via the primary particle outlet (610).

公开(公告)号：CA3152199A1

公开(公告)日：2022-10-07

申请号：CA3152199

申请日：2022-03-16

Applicant: VALMET TECHNOLOGIES OY

Inventor： LEHTONEN PEKKA

IPC: F28C3/10 ,  F22G1/00

Abstract: A heat exchanger (10) suitable for recovering heat from bed material of a fluidized bed boiler (1). The heat exchanger (10) comprises first and second heat exchanger tubes (810, 820) and first and second feeding chambers (310, 320) configured to supply bed material to the first and second heat exchanger tubes (810, 820), respectively. The first heat exchanger tubes (810) are arranged on a first side of a plane (P) that intersects the first feeding chamber (310) and the second heat exchanger tubes (820) are arranged on a second side of the plane (P). The first feeding chamber (310) is configured to supply bed material to the second feeding chamber (320).

公开(公告)号：CA3042146C

公开(公告)日：2022-06-21

申请号：CA3042146

申请日：2016-11-01

Applicant: VALMET TECHNOLOGIES OY

Inventor： LEHTONEN PEKKA

IPC: F23C10/26 ,  F22B31/00 ,  F22B37/10 ,  F23C10/06

Abstract: The invention relates to a circulating fluidized bed boiler (1). The circulating fluidized bed boiler (1) comprises a furnace (50), a loopseal (5), and a loopseal heat exchanger (10) arranged in the loopseal (5). The loopseal heat exchanger (10) comprises walls (500, 505, 507, 510, 520, 530, 540, 550, 60) limiting an interior (11) of the loopseal heat exchanger (10), a first particle outlet (590) for letting out particulate material from the loopseal heat exchanger (10), an inlet (31) for receiving bed material, heat exchanger tubes (810, 820, 830) arranged in the interior (11) of the loopseal heat exchanger (10), and a first ash removal channel (211, 421) configured to let out ash from the loopseal heat exchanger (10). An ash cooler (600) is configured to receive ash from the first ash removal channel (211, 421). In the loopseal heat exchanger (1) the first ash removal channel (211, 421) is arranged at a lower level than the first particle outlet (590).

公开(公告)号：FI131188B1

公开(公告)日：2024-11-26

申请号：FI20206175

申请日：2020-11-19

Applicant: VALMET TECHNOLOGIES OY

Inventor： HILJANEN JUHA ,  LEHTONEN PEKKA ,  TAPIAINEN PERTTI ,  VARONEN MIKKO

IPC: F23C6/02 ,  F22B31/04 ,  F23C10/00

Abstract: A method for heating a heat exchange medium in a fluidized bed boiler (100), the method comprising burning first fuel (165) in a first furnace (162) of the fluidized bed boiler (100) to produce first flue gas (163); recovering heat from the first flue gas (163) to a heat exchange medium using a first heat exchanger (310); conveying the heat exchange medium from the first heat exchanger (310) to a second heat exchanger (320), of which at least a part is arranged in contact with a fluidized bed of the fluidized bed boiler (100); burning second fuel (175) in a second furnace (172) of the fluidized bed boiler (100) to produce second flue gas (173); conveying the heat exchange medium from the second heat exchanger (320) to a third heat exchanger (330); and recovering heat from the second flue gas (173) to the heat exchange medium using the third heat exchanger (330). A fluidized bed boiler (100) for performing the method. A loopseal heat exchanger (400) that is, when installed in a loopseal of a circulating fluidized bed boiler, configured to burn second fuel (175) in a second furnace (172) of the loopseal heat exchanger (400) to produce second flue gas (173); convey the heat exchange medium from the second heat exchanger (320) to a third heat exchanger (330); and recover heat from the second flue gas (173) to the heat exchange medium using the third heat exchanger (330).

公开(公告)号：FI20206175A1

公开(公告)日：2022-05-20

申请号：FI20206175

申请日：2020-11-19

Applicant: VALMET TECHNOLOGIES OY

Inventor： LEHTONEN PEKKA ,  HILJANEN JUHA ,  VARONEN MIKKO ,  TAPIAINEN PERTTI

IPC: F23C6/02 ,  F22B31/04 ,  F23C10/00

Abstract: A method for heating a heat exchange medium in a fluidized bed boiler (100), the method comprising burning first fuel (165) in a first furnace (162) of the fluidized bed boiler (100) to produce first flue gas (163); recovering heat from the first flue gas (163) to a heat exchange medium using a first heat exchanger (310); conveying the heat exchange medium from the first heat exchanger (310) to a second heat exchanger (320), of which at least a part is arranged in contact with a fluidized bed of the fluidized bed boiler (100); burning second fuel (175) in a second furnace (172) of the fluidized bed boiler (100) to produce second flue gas (173); conveying the heat exchange medium from the second heat exchanger (320) to a third heat exchanger (330); and recovering heat from the second flue gas (173) to the heat exchange medium using the third heat exchanger (330). A fluidized bed boiler (100) for performing the method. A loopseal heat exchanger (400) that is, when installed in a loopseal of a circulating fluidized bed boiler, configured to burn second fuel (175) in a second furnace (172) of the loopseal heat exchanger (400) to produce second flue gas (173); convey the heat exchange medium from the second heat exchanger (320) to a third heat exchanger (330); and recover heat from the second flue gas (173) to the heat exchange medium using the third heat exchanger (330).