Patents by Inventor Patrick Duche

Patrick Duche 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 of improving combustion in a system having a circulating fluidized bed, and a corresponding system
    Patent number: 6431095
    Abstract: The method is applicable to a combustion system of the circulating fluidized bed type which system includes a hearth and a cyclone, and operates using fuel that is inserted into the bottom of the hearth, where a reducing atmosphere is created and where the fuel undergoes pyrolysis with separation into two phases, namely a solid phase made up of grains of coke, and a gaseous phase containing volatile matter. Provision is made for a primary air injection, secondary air injections, and a late air injection to be performed at different levels. The late air injected between the top of the hearth and the inlet of the cyclone is used to increase the efficiency with which the cyclone collects the particles that reach the top of the hearth unburnt, and thus to increase the combustion efficiency of the system. The system includes air injection means making it possible to implement the method.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: August 13, 2002
    Assignee: ABB Alstom Power Combustion
    Inventors: François Malaubier, Patrick Duche
  • Method of improving combustion in a system having a circulating fluidized bed, and a corresponding system
    Publication number: 20010006769
    Abstract: The method is applicable to a combustion system of the circulating fluidized bed type which system includes a hearth and a cyclone, and operates using fuel that is inserted into the bottom of the hearth, where a reducing atmosphere is created and where the fuel undergoes pyrolysis with separation into two phases, namely a solid phase made up of grains of coke, and a gaseous phase containing volatile matter. Provision is made for a primary air injection, secondary air injections, and a late air injection to be performed at different levels. The late air injected between the top of the hearth and the inlet of the cyclone is used to increase the efficiency with which the cyclone collects the particles that reach the top of the hearth unburnt, and thus to increase the combustion efficiency of the system. The system includes air injection means making it possible to implement the method.
    Type: Application
    Filed: December 13, 2000
    Publication date: July 5, 2001
    Inventors: Francois Malaubier, Patrick Duche