Patents Represented by Law Firm St.Onge Steward Johnston & Reenx
  • Method and apparatus for preparing calcium carbonate for scrubbing sulfur oxides from combustion effluents
    Patent number: 5820831
    Abstract: Limestone is dried for grinding to very fine particles e.g., about 8.mu. or less with more than 99% of the particle by weight less than 44.mu., by utilizing waste heat from the flue gas from a large combustor. The finely-divided calcium carbonate is then introduced dry into a scrubbing tower where it mixes with and renews the slurry employed therein for scrubbing SO.sub.x -laden effluent.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: October 13, 1998
    Assignee: ABB Environmental Systems, Div. of ABB Flakt, Inc.
    Inventor: Gerald E. Bresowar