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公开(公告)号：US20180283683A1
公开(公告)日：2018-10-04
申请号：US15766541
申请日：2016-11-07
Applicant: Improbed AB
Inventor： Bengt-Ake Andersson , Pavleta Knutsson , Fredrik Lind , Henrik Thunman
CPC classification number: F23C10/02 , C22B34/1204 , F23C10/00 , F23C10/007 , F23C10/32 , F23C2206/102 , F23C2900/10001
Abstract: The invention relates to a method for operating a fluidized bed boiler, comprising carrying out the combustion process with a fluidized bed comprising ilmenite particles, wherein the average residence time of the ilmenite particles in the boiler is at least 75 hours. The invention further relates to ilmenite particles obtainable by a corresponding method and the use of said ilmenite particles as oxygen-carrying material.
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公开(公告)号：US11187406B2
公开(公告)日：2021-11-30
申请号：US15766542
申请日：2016-11-07
Applicant: Improbed AB
Inventor： Bengt-Ake Andersson , Pavleta Knutsson , Fredrik Lind , Henrik Thunman
Abstract: The invention relates to abed management cycle for a fluidized bed boiler, comprising the steps of: a) providing fresh ilmenite particles as bed material to the fluidized bed boiler; b) carrying out a fluidized bed combustion process; c) removing at least one ash stream comprising ilmenite particles from the fluidized bed boiler; d) separating ilmenite particles from the at least one ash stream; e) recirculating separated ilmenite particles into the bed of the fluidized bed boiler. The invention also relates to a corresponding arrangement for carrying out fluidized bed combustion, comprising a fluidized bed boiler comprising ilmenite particles as bed material; and a system for removing ash from the fluidized bed boiler; wherein the arrangement further comprises a separator for separating ilmenite particles from the re-moved ash; and means for recirculating separated ilmenite particles into the bed of the fluidized bed boiler.
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公开(公告)号：US10808924B2
公开(公告)日：2020-10-20
申请号：US15766541
申请日：2016-11-07
Applicant: Improbed AB
Inventor： Bengt-Ake Andersson , Pavleta Knutsson , Fredrik Lind , Henrik Thunman
Abstract: The invention relates to a method for operating a fluidized bed boiler, comprising carrying out the combustion process with a fluidized bed comprising ilmenite particles, wherein the average residence time of the ilmenite particles in the boiler is at least 75 hours. The invention further relates to ilmenite particles obtainable by a corresponding method and the use of said ilmenite particles as oxygen-carrying material.
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公开(公告)号：US20190072270A1
公开(公告)日：2019-03-07
申请号：US15766542
申请日：2016-11-07
Applicant: Improbed AB
Inventor： Bengt-Ake Andersson , Pavleta Knutsson , Fredrik Lind , Henrik Thunman
Abstract: The invention relates to abed management cycle for a fluidized bed boiler, comprising the steps of: a) providing fresh ilmenite particles as bed material to the fluidized bed boiler; b) carrying out a fluidized bed combustion process; c) removing at least one ash stream comprising ilmenite particles from the fluidized bed boiler; d) separating ilmenite particles from the at least one ash stream; e) recirculating separated ilmenite particles into the bed of the fluidized bed boiler. The invention also relates to a corresponding arrangement for carrying out fluidized bed combustion, comprising a fluidized bed boiler comprising ilmenite particles as bed material; and a system for removing ash from the fluidized bed boiler; wherein the arrangement further comprises a separator for separating ilmenite particles from the re-moved ash; and means for recirculating separated ilmenite particles into the bed of the fluidized bed boiler.
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