Patents by Inventor Erik .ANG.gren

Erik .ANG.gren 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).

  • Recovery boiler operation with black liquor feed in separate liquid stream and solid stream
    Patent number: 5879511
    Abstract: The present invention relates to a method of improving the operation of a boiler plant in a chemical pulp mill. At least part of the black liquor flow of the chemical pulp mill is divided into several batches being substantially in a solid form, which are mechanically turned into substantially equal-sized pieces for deeding into the recovery boiler and for combustion taking place therein. Waste liquor batches may be stored prior to the combustion. The invention also relates to a system for carrying out the method.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: March 9, 1999
    Assignee: Ahlstrom Machinery OY
    Inventor: Erik .ANG.gren