Patents by Inventor Katja Häkkinen

Katja Häkkinen 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).

  • Method of and apparatus for controlling a gasifier
    Patent number: 9593283
    Abstract: A method of controlling a circulating fluidized bed gasifier includes feeding first and second portions of particulate material to be gasified through inlets in a gasifier. Oxygen and steam are fed through a bottom grid into a lower portion of the gasifier to fluidize the bed. Product gas and entrained particles are discharged from an upper portion of the gasifier. Particles are separated from the product gas and a portion of the separated particles is returned to the lower portion. A portion of the returned particles is oxidized to generate heat. Heat and oxidizing products from the lower portion are transferred to the center portion to generate the product gas. A ratio of the first and second portions of particulate material to be gasified is determined on the basis of a measured temperature profile so as to control the vertical temperature distribution in the gasifier.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: March 14, 2017
    Assignee: AMEC FOSTER WHEELER ENERGIA OY
    Inventors: Juha Palonen, Sami Kokki, Katja Häkkinen
  • METHOD OF AND APPARATUS FOR CONTROLLING A GASIFIER
    Publication number: 20150315500
    Abstract: A method of controlling a circulating fluidized bed gasifier includes feeding first and second portions of particulate material to be gasified through inlets in a gasifier. Oxygen and steam are fed through a bottom grid into a lower portion of the gasifier to fluidize the bed. Product gas and entrained particles are discharged from an upper portion of the gasifier. Particles are separated from the product gas and a portion of the separated particles is returned to the lower portion. A portion of the returned particles is oxidized to generate heat. Heat and oxidizing products from the lower portion are transferred to the center portion to generate the product gas. A ratio of the first and second portions of particulate material to be gasified is determined on the basis of a measured temperature profile so as to control the vertical temperature distribution in the gasifier.
    Type: Application
    Filed: December 4, 2013
    Publication date: November 5, 2015
    Inventors: Juha Palonen, Sami Kokki, Katja Häkkinen