Patents by Inventor Ake A. Andersson

Ake A. Andersson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11085635
    Abstract: The invention relates to a system for recycling fluidized bed boiler bed material, comprising: a. a bottom ash removal device for removing bed material from a fluidized bed boiler, b. a mechanical classifier (10) comprising a mesh size from 200 to 1,000 ?m designed to separate a coarse and a fine particle size fraction, c. a magnetic separator (12) designed to magnetically classify the fine particle fraction from the mechanical classifier, d. a device for recirculating the magnetic particle fraction into the boiler. The invention allows effective recirculation and reuse of ilmenite bed material.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: August 10, 2021
    Assignee: Improbed AB
    Inventors: Mikael Israelsson, Bengt-Ake Andersson, Lars Bierlein
  • Publication number: 20210230714
    Abstract: The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.
    Type: Application
    Filed: February 22, 2021
    Publication date: July 29, 2021
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Patent number: 11060719
    Abstract: The invention is in the field of boiler control and relates to a control method for the operation of a combustion boiler, comprising providing a predetermined upper limit (VF,max) for the flue gas velocity in at least one location of the boiler; monitoring the flue gas velocity (VF) during the combustion of fuel in said at least one location of the boiler; comparing the flue gas velocity (VF) with the predetermined upper limit (VF,max); decreasing the thermal load of the boiler if the flue gas velocity exceeds the predetermined upper limit (VF,max). The invention also relates to a control system configured to execute the control method.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: July 13, 2021
    Assignee: Improbed AB
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Patent number: 11047568
    Abstract: The invention relates to a method for operating a fluidized bed boiler, comprising: a) setting the ratio of secondary oxygen containing gas to primary oxygen containing fluidizing gas to a value ranging from 0.0 to 0.8; b) carrying out the combustion of fuel with a fluidized bed comprising ilmenite particle; and to a fluidized bed boiler.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: June 29, 2021
    Assignee: Improbed AB
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Patent number: 10927432
    Abstract: The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: February 23, 2021
    Assignee: IMPROBED AB
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Patent number: 10871286
    Abstract: The invention is in the technical field of bubbling fluidized bed combustion and relates to the use of ilmenite particles with an average particle size <dp> between 0.1 mm and 1.8 mm as bed material for a bubbling fluidized bed (BFB) boiler with an excess air ratio (?) below 1.3 and to a method for operating a bubbling fluidized bed (BFB) boiler, comprising carrying out the combustion process with a bubbling fluidized bed comprising ilmenite particles as defined in any one of claims 1 and 4-5; and setting the excess air ratio (?) to a value below 1.3.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: December 22, 2020
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Patent number: 10808924
    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.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: October 20, 2020
    Assignee: Improbed AB
    Inventors: Bengt-Ake Andersson, Pavleta Knutsson, Fredrik Lind, Henrik Thunman
  • Publication number: 20200292163
    Abstract: The invention relates to a method for operating a fluidized bed boiler (6), comprising the steps of: a) providing fresh ilmenite particles having a shape factor of 0.8 or lower as bed material to the fluidized bed boiler (6); 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, wherein the separation includes a step of using a magnetic separator (12) comprising a field strength of 2,000 Gauss or more; e) recirculating separated ilmenite particles into the bed of the fluidized bed boiler; wherein the average residence time of ilmenite particles in the fluidized bed is 100 h or more.
    Type: Application
    Filed: April 18, 2018
    Publication date: September 17, 2020
    Inventor: Bengt-Ake Andersson
  • Publication number: 20200292169
    Abstract: The invention relates to a system for recycling fluidized bed boiler bed material, comprising: a. a bottom ash removal device for removing bed material from a fluidized bed boiler, b. a mechanical classifier (10) comprising a mesh size from 200 to 1,000 ?m designed to separate a coarse and a fme particle size fraction, c. a magnetic separator (12) designed to magnetically classify the fine particle fraction from the mechanical classifier, d. a device for recirculating the magnetic particle fraction into the boiler. The invention allows effective recirculation and reuse of ilmenite bed material.
    Type: Application
    Filed: April 10, 2018
    Publication date: September 17, 2020
    Inventors: Mikael Israelsson, Bengt-Ake Andersson, Lars Bierlein
  • Publication number: 20190203320
    Abstract: The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.
    Type: Application
    Filed: June 7, 2016
    Publication date: July 4, 2019
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Publication number: 20190072270
    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.
    Type: Application
    Filed: November 7, 2016
    Publication date: March 7, 2019
    Inventors: Bengt-Ake Andersson, Pavleta Knutsson, Fredrik Lind, Henrik Thunman
  • Patent number: 10164410
    Abstract: The following invention relates to an ignition coil assembly for an ignition system comprising an ignition coil where said assembly has a main axis and is configured for insertion into and/or removal out of a well associated with an internal combustion engine, wherein the assembly comprises an elongated extension body made of flexible material, said extension body comprising an upper end portion and a lower end portion wherein the extension body is arranged to be transversally bendable in relation to the main axis so that the upper end portion and the lower end portion may assume an angle (?) in relation to each other.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: December 25, 2018
    Assignee: SEM AB
    Inventors: Lars-Ake Andersson, Jorgen Bengtsson, Bert Gustafsson
  • Publication number: 20180283683
    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.
    Type: Application
    Filed: November 7, 2016
    Publication date: October 4, 2018
    Inventors: Bengt-Ake Andersson, Pavleta Knutsson, Fredrik Lind, Henrik Thunman
  • Publication number: 20180180281
    Abstract: The invention relates to a method for operating a fluidized bed boiler, comprising: a) setting the ratio of secondary oxygen containing gas to primary oxygen containing fluidizing gas to a value ranging from 0.0 to 0.8; b) carrying out the combustion of fuel with a fluidized bed comprising ilmenite particle; and to a fluidized bed boiler.
    Type: Application
    Filed: June 7, 2016
    Publication date: June 28, 2018
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Publication number: 20180180282
    Abstract: The invention is in the field of boiler control and relates to a control method for the operation of a combustion boiler, comprising providing a predetermined upper limit (VF,max) for the flue gas velocity in at least one location of the boiler, monitoring the flue gas velocity (VF) during the combustion of fuel in said at least one location of the boiler, comparing the flue gas velocity (VF) with the predetermined upper limit (VF,max); decreasing the thermal load of the boiler if the flue gas velocity exceeds the predetermined upper limit (VF,max). The invention also relates to a control system configured to execute the control method.
    Type: Application
    Filed: June 7, 2016
    Publication date: June 28, 2018
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Publication number: 20180087882
    Abstract: A jacketed tracer projectile intended for small-caliber and medium-caliber weapons includes, a metal core including a tracer device, in particular in the form of a pyrotechnic tracer charge, disposed inside a cavity in the metal core in the rear part of the projectile. The cavity is designed to prevent the tracer device from becoming separated from the cavity during the discharge phase of the tracer projectile. The cross-sectional area of the cavity is typically polygonal. A method for the application of the tracer device in the tracer projectile is also provided.
    Type: Application
    Filed: March 29, 2016
    Publication date: March 29, 2018
    Applicant: NAMMO VANÄSVERKEN AB
    Inventors: Åke ANDERSSON, Andreas BJÄRSTÄTT, Henrik JOHANSSON, Lina NORUM
  • Publication number: 20180038586
    Abstract: The invention is in the technical field of bubbling fluidized bed combustion and relates to the use of ilmenite particles with an average particle size <dp> between 0.1 mm and 1.8 mm as bed material for a bubbling fluidized bed (BFB) boiler with an excess air ratio (?) below 1.3 and to a method for operating a bubbling fluidized bed (BFB) boiler, comprising carrying out the combustion process with a bubbling fluidized bed comprising ilmenite particles as defined in any one of claims 1 and 4-5; and setting the excess air ratio (?) to a value below 1.3.
    Type: Application
    Filed: December 17, 2015
    Publication date: February 8, 2018
    Inventors: Bengt-Ake Andersson, Fredrik Lind, Henrik Thunman
  • Patent number: 9203278
    Abstract: A mounting bracket for an electrical motor having two mounting interfaces at different distances from the bottom surface to be used in combination with two stator frames of different sizes. A method for obtaining equal shaft heights for electrical motors having stator frames of different sizes.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: December 1, 2015
    Assignee: ABB Technology Ltd
    Inventors: Ake Andersson, Gustav Borg
  • Publication number: 20150144019
    Abstract: The invention relates to a lead-free projectile (5) having improved performance and intended for small-bore weapons, configured so that the quantity of toxic metal particles and gases which is formed by the friction between the projectile (5) and the inner side of the weapon upon firing of the projectile (5) is reduced, at the same time as the performance of the projectile (5) is improved or maintained.
    Type: Application
    Filed: May 16, 2013
    Publication date: May 28, 2015
    Applicant: Nammo Vanasverken AB
    Inventors: Ake Andersson, Fredrik Erninge, Henrik Johansson, Thomas Mauritzson
  • Publication number: 20150136098
    Abstract: The following invention relates to an ignition coil assembly for an ignition system comprising an ignition coil where said assembly has a main axis and is configured for insertion into and/or removal out of a well associated with an internal combustion engine, wherein the assembly comprises an elongated extension body made of flexible material, said extension body comprising an upper end portion and a lower end portion wherein the extension body is arranged to be transversally bendable in relation to the main axis so that the upper end portion and the lower end portion may assume an angle (?) in relation to each other.
    Type: Application
    Filed: May 14, 2013
    Publication date: May 21, 2015
    Applicant: SEM AB
    Inventors: Lars-Ake Andersson, Jorgen Bengtsson, Bert Gustafsson