Patents by Inventor Archibald Robertson

Archibald Robertson 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).

  • Publication number: 20120189522
    Abstract: A method of desulfurizing flue gas in connection with oxy-combustion. A sulfur containing gas flow is introduced to a flue gas desulfurization arrangement having a spray tower at its top part and a reaction tank at its bottom part, in which the reaction tank contains liquid slurry having a surface level L. Sorbent-containing liquid slurry is sprayed to the sulfur containing gas flow. Sulfur-containing molecules are allowed to be absorbed into liquid slurry droplets. The liquid slurry droplets are allowed to enter the liquid slurry in the reaction tank. Oxygen containing gas is bubbled in the liquid slurry from a gas inlet header and nozzles in the reaction tank, in which the nozzles are arranged at a certain level in the reaction tank. Sulfur-containing particulates settle in the reaction tank.
    Type: Application
    Filed: January 20, 2011
    Publication date: July 26, 2012
    Applicant: FOSTER WHEELER NORTH AMERICA CORP.
    Inventors: Zhen Fan, Andrew Seltzer, Archibald Robertson, JR., Horst Hack
  • Patent number: 7946843
    Abstract: A method of and a plant for combusting carbonaceous fuel, the method including the steps of introducing particulate oxygen selective sorbent, such as a perovskite type material, into an adsorption reactor of the combustion plant to form a first particle bed in the adsorption reactor, fluidizing the first particle bed by an oxygen-containing first fluidizing gas to adsorb oxygen from the fluidizing gas to the sorbent, conveying oxygen-rich sorbent from the adsorption reactor to a combustion reactor of the combustion plant to form a second particle bed in the combustion reactor, fluidizing the second particle bed by an oxygen-deficient second fluidizing gas to desorb oxygen from the sorbent, so as to produce free oxygen gas, and introducing carbonaceous fuel into the combustion reactor to oxidize the fuel with the free oxygen gas.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: May 24, 2011
    Assignee: Foster Wheeler North America Corp.
    Inventors: Zhen Fan, Horst Hack, Andrew Seltzer, Archibald Robertson
  • Publication number: 20090260585
    Abstract: Carbonaceous fuel is combusted with an oxidant gas in a furnace of a boiler system to generate power. Oxidant gas is fed into the furnace for combusting the fuel to produce exhaust gas, the exhaust gas is discharged from the furnace via an exhaust gas channel, a stream of feedwater is conveyed from a final economizer arranged in the exhaust gas channel to evaporating and superheating heat exchange surfaces arranged in the furnace and in the exhaust gas channel for converting the feedwater to superheated steam, the superheated steam is converted in a high-pressure steam turbine for generating power, a first portion of steam is extracted from the high-pressure steam turbine for preheating the feedwater, a second portion of steam is conveyed from the high-pressure steam turbine to reheating heat exchange surfaces arranged in the exhaust gas channel for generating reheated steam, and the reheated steam is expanded in an intermediate pressure steam turbine for generating power.
    Type: Application
    Filed: April 22, 2008
    Publication date: October 22, 2009
    Applicant: FOSTER WHEELER ENERGY CORPORATION
    Inventors: Horst Hack, Andrew Seltzer, Zhen Fan, Archibald Robertson, Timo Eriksson, Ossi Sippu
  • Publication number: 20090158978
    Abstract: A method of controlling a process of generating power in a power plant with a boiler by combusting carbonaceous fuel with substantially pure oxygen. At full load conditions, the method includes introducing a first carbonaceous fuel feed stream into a furnace, introducing a first substantially pure oxygen feed stream into the furnace for combusting the first carbonaceous fuel feed stream with the oxygen, and recirculating a portion of the exhaust gas discharged from the furnace at a first recirculation flow rate to the furnace, to form, together with the first substantially pure oxygen feed stream, a first inlet gas stream having a predetermined average oxygen content, thereby discharging exhaust gas from the furnace at a first discharge flow rate.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 25, 2009
    Applicant: Foster Wheeler Energy Corporation
    Inventors: Andrew Seltzer, Zhen Fan, Horst Hack, Archibald Robertson
  • Publication number: 20090020405
    Abstract: A method of and a plant for combusting carbonaceous fuel, the method including the steps of introducing particulate oxygen selective sorbent, such as a perovskite type material, into an adsorption reactor of the combustion plant to form a first particle bed in the adsorption reactor, fluidizing the first particle bed by an oxygen-containing first fluidizing gas to adsorb oxygen from the fluidizing gas to the sorbent, conveying oxygen-rich sorbent from the adsorption reactor to a combustion reactor of the combustion plant to form a second particle bed in the combustion reactor, fluidizing the second particle bed by an oxygen-deficient second fluidizing gas to desorb oxygen from the sorbent, so as to produce free oxygen gas, and introducing carbonaceous fuel into the combustion reactor to oxidize the fuel with the free oxygen gas.
    Type: Application
    Filed: July 20, 2007
    Publication date: January 22, 2009
    Applicant: Foster Wheeler Energy Corporation
    Inventors: Zhen FAN, Horst Hack, Andrew SELTZER, Archibald Robertson
  • Publication number: 20060130401
    Abstract: A method of co-producing activated carbon in a circulating, fluidized bed gasification process includes gasifying carbonaceous fuel in a fluidized bed to form syngas and char, activating the char to form particles of activated carbon, discharging syngas and particulate solids entrained with the syngas from the reactor, separating entrained solids from the syngas with a particle separator and returning at least a portion of the separated solids to the reaction chamber, but allowing a solids product, including activated carbon and having an average size smaller than a predetermined size, to exit the particle separator with the syngas. The solids product is separated from the syngas in a dust separator to form cleaned syngas, and both the cleaned syngas and the solids product are discharged from the gasifier.
    Type: Application
    Filed: December 16, 2004
    Publication date: June 22, 2006
    Applicant: FOSTER WHEELER ENERGY CORPORATION
    Inventors: Robert Giglio, Zhen Fan, Robert Froehlich, Archibald Robertson, Kumar Sellakumar, Song Wu
  • Patent number: 4479458
    Abstract: A reactor in which a plurality of vertical panels are disposed in a vessel and are constructed and arranged so as to form three combustion cells. Three of the panels each form a common wall between adjacent cells, and each cell is heated by a fluidized bed.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: October 30, 1984
    Assignee: Foster Wheeler Energy Corporation
    Inventors: Stephen J. Goidich, Archibald Robertson, Walter Wolowodiuk