Patents by Inventor Sauli RISSANEN

Sauli RISSANEN 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).

  • Determining the reduction rate of a recovery boiler
    Patent number: 12134859
    Abstract: A method to determine a reduction rate of a recovery boiler using optical information from a chemical smelt sample. A processor is used to read a digital frame at least part of which represents the chemical smelt sample of the recovery boiler. An area of interest is determined from the digital frame read comprising at least part of the area in the digital frame representing the chemical smelt sample. Of the pixel values of the area of interest, one or more spectral characteristic values correlating with the change of reduction rate are determined. The reduction rate of the recovery boiler is determined using a reduction rate function of one or more of the determined spectral characteristic values weighted at predetermined weights.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: November 5, 2024
    Assignee: Andritz Oy
    Inventors: Heikki Lappalainen, Juho Nurmi, Sauli Rissanen, Esa Vihavainen
  • DETERMINING THE REDUCTION RATE OF A RECOVERY BOILER
    Publication number: 20220220671
    Abstract: A method to determine a reduction rate of a recovery boiler using optical information from a chemical smelt sample. A processor is used to read a digital frame at least part of which represents the chemical smelt sample of the recovery boiler. An area of interest is determined from the digital frame read comprising at least part of the area in the digital frame representing the chemical smelt sample. Of the pixel values of the area of interest, one or more spectral characteristic values correlating with the change of reduction rate are determined. The reduction rate of the recovery boiler is determined using a reduction rate function of one or more of the determined spectral characteristic values weighted at predetermined weights.
    Type: Application
    Filed: May 15, 2020
    Publication date: July 14, 2022
    Inventors: Heikki LAPPALAINEN, Juho NURMI, Sauli RISSANEN, Esa VIHAVAINEN