Patents by Inventor Douglas I. Bain

Douglas I. Bain 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).

  • Vermiculite as a deposit modifier in coal fired boilers
    Patent number: 4369719
    Abstract: Uncalcined vermiculite is injected into the coal fired furnace, at 3000.degree.-1200.degree. F., thereby facilitating removal of deposits that accumulate on line within the furnace.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: January 25, 1983
    Assignee: Dearborn Chemical Company
    Inventors: Gary G. Engstrom, Douglas I. Bain
  • Fly ash collection
    Patent number: 4256703
    Abstract: To a coal-fired furnace that uses electrostatic precipitation or a mechanical collector to collect fly ash, a mix of magnesia-alumina or magnesia-talc is added above the fireball (2600.degree.-3300.degree. F.). The additive increases the mean particle size of the fly ash and reduces its surface resistivity, thereby causing improved collection in the electrostatic precipitators or mechanical collector. Fine particulates containing heavy metals tend to be agglomerated; thus the invention permits recovery of substantial amounts of heavy metal contaminants that would otherwise be lost as stack emission.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: March 17, 1981
    Assignee: Chemed Corporation
    Inventors: Shyam N. S. Dixit, Douglas I. Bain, David A. Carter
  • Air heater corrosion prevention
    Patent number: 4245573
    Abstract: An additive, e. g., MgO.Mg silicate, is injected into the flue gas stream of a coal-or oil-fired furnace, at 2300-1700 deg. F., thereby reducing accumulation of sulfuric acid on the air heater inlet and outlet.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: January 20, 1981
    Assignee: Chemed Corporation
    Inventors: Shyam N. S. Dixit, Douglas I. Bain, David A. Carter