Patents by Inventor Gunnar Hage

Gunnar Hage 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).

  • Control of a black liquor recovery boiler
    Patent number: 4683841
    Abstract: A method for controlling the combustion and reduction processes in a black liquor (B.L.) boiler of a paper pulp plant by influencing the feeding of black liquor to the B.L. recovery boiler by means of a B.L. gun. Characteristic of the method is that the average thickness of the layer of the B.L. flow, immediately after the black liquor has left the B.L. gun, is controlled to have a desired magnitude. The thickness of the B.L. layer is obtained in the form of an indirect measure which is defined as the droplet index (=DIX) and is constituted by a relationship between the viscosity, the density and the feed rate of the black liquor and by at least the shape and the opening area, of the B.L. gun.
    Type: Grant
    Filed: March 6, 1986
    Date of Patent: August 4, 1987
    Assignees: Svenska Traforskningsinstitutet, Sodra Skogsagarna AB--Monsteras Bruk, ASEA Aktiebolag
    Inventors: Susanne Andersson, Jan-Erik Gustafsson, Torbjorn Herngren, Staffan Carlsson, Gunnar Hage