Patents by Inventor Andreas Gruber-Waltl

Andreas Gruber-Waltl 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 for reducing the content of fine material in FGD gypsum
    Patent number: 9139449
    Abstract: A method for obtaining gypsum using a flue-gas desulfurization system (FGD) having a gypsum suspension, which includes fine materials such as active carbon particles or residual carbonate particles for example, accumulates in the scrubber of a wet flue gas scrubber. The gypsum-containing suspension is thickened by at least one hydrocyclone, and the thickened gypsum suspension is discharged via the underflow of the hydrocyclone. Water is fed to the hydrocyclone in addition to the gypsum suspension via a dedicated feed line such that the content of fine material is thus reduced with respect to the suspension volume in the underflow.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: September 22, 2015
    Assignee: ANDRITZ AG
    Inventors: Michael Kramer, Andreas Gruber-Waltl
  • METHOD FOR REDUCING THE CONTENT OF FINE MATERIAL IN FGD GYPSUM
    Publication number: 20150041374
    Abstract: A method for obtaining gypsum using a flue-gas desulfurization system (FGD) having a gypsum suspension, which includes fine materials such as active carbon particles or residual carbonate particles for example, accumulates in the scrubber of a wet flue gas scrubber. The gypsum-containing suspension is thickened by at least one hydrocyclone, and the thickened gypsum suspension is discharged via the underflow of the hydrocyclone. Water is fed to the hydrocyclone in addition to the gypsum suspension via a dedicated feed line such that the content of fine material is thus reduced with respect to the suspension volume in the underflow.
    Type: Application
    Filed: February 8, 2013
    Publication date: February 12, 2015
    Inventors: Michael Kramer, Andreas Gruber-Waltl