Patents by Inventor Hamid Sarv

Hamid Sarv 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).

  • Patent number: 6386863
    Abstract: A compound spin vane (CSV) for use in an air passage of a fossil fuel-fired burner. In one embodiment, the CSV is a multi-piece construction of platelike outer and inner vane elements connected to an intermediate platelike rail element. In another embodiment, the CSV includes at least two and possibly three vane portions, rigidly interconnected in spaced lateral relationship with respect to each other. If desired, the vane portions may be simple, curved planar surfaces, and may be arranged with trailing edges arranged at angles with respect to each other. The invention may be employed as a replacement for flat spin vanes found in secondary air passages of known single and dual register burners. When used in such manner in a single register burner, the invention changes secondary air flow characteristics so as to mimic those commonly found in a dual register burner.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: May 14, 2002
    Assignee: The Babcock & Wilcox Company
    Inventors: Hamid Sarv, Jeffrey A. LaRose, Albert D. LaRue, Peter W. Waanders
  • Patent number: 6146130
    Abstract: A compound spin vane (CSV) for use in an air passage of a fossil fuel-fired burner. In one embodiment, the CSV is a multi-piece construction of platelike outer and inner vane elements connected to an intermediate platelike rail element. In another embodiment, the CSV includes at least two and possibly three vane portions, rigidly interconnected in spaced lateral relationship with respect to each other. If desired, the vane portions may be simple, curved planar surfaces, and may be arranged with trailing edges arranged at angles with respect to each other. The invention may be employed as a replacement for flat spin vanes found in secondary air passages of known single and dual register burners. When used in such manner in a single register burner, the invention changes secondary air flow characteristics so as to mimic those commonly found in a dual register burner.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: November 14, 2000
    Assignee: The Babcock & Wilcox Company
    Inventors: Hamid Sarv, Jeffrey A. LaRose, Albert D. LaRue, Peter W. Waanders
  • Patent number: 5829369
    Abstract: A burner having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO.sub.x burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO.sub.x back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: November 3, 1998
    Assignee: The Babcock & Wilcox Company
    Inventors: Jennifer L. Sivy, Larry W. Rodgers, John V. Koslosy, Albert D. LaRue, Keith C. Kaufman, Hamid Sarv
  • Patent number: 5827054
    Abstract: A compound spin vane (CSV) for use in an air passage of a fossil fuel-fired burner. In one embodiment, the CSV is a multi-piece construction of platelike outer and inner vane elements connected to an intermediate platelike rail element. In another embodiment, the CSV includes at least two and possibly three vane portions, rigidly interconnected in spaced lateral relationship with respect to each other. If desired, the vane portions may be simple, curved planar surfaces, and may be arranged with trailing edges arranged at angles with respect to each other. The invention may be employed as a replacement for flat spin vanes found in secondary air passages of known single and dual register burners. When used in such manner in a single register burner, the invention changes secondary air flow characteristics so as to mimic those commonly found in a dual register burner.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 27, 1998
    Assignee: The Babcock & Wilcox Company
    Inventors: Hamid Sarv, Jeffrey A. LaRose, Albert D. LaRue, Peter W. Waanders
  • Patent number: 5807094
    Abstract: An air premixed natural gas burner having reduced thermal and prompt NO.sub.x emissions employs a central, cylindrical core chamber and an outer annular chamber separated by a hollow barrel having a plurality of gas spuds at a front end of the burner adjacent to a burner throat. The plurality of gas spuds introduces natural gas into a core chamber air flow passing through a fixed swirler and controlled by a sliding air flow damper associated with the central, cylindrical core chamber. A reduced air/fuel stoichiometric ratio (of approximately 0.6) is preferably maintained at an outlet of the central, cylindrical core chamber. The balance of the combustion air is provided through the outer annular chamber to maintain an overall or cumulative burner stoichiometric ratio of approximately 1.05.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: September 15, 1998
    Assignee: McDermott Technology, Inc.
    Inventor: Hamid Sarv
  • Patent number: 5697306
    Abstract: A burner for the combustion of a pulverized coal plus primary air mixture includes a nozzle pipe having an inlet for receiving a pulverized coal plus primary air mixture and an outlet for discharging same. A hollow plug extends axially within the nozzle pipe and defines an annular space between the plug and the nozzle pipe for conveying the pulverized coal plus primary air mixture therethrough. The hollow plug is axially moveable within the nozzle pipe. A variable amount of core air is supplied into the hollow plug so that it mixes with the primary air plus pulverized coal mixture at an outlet of the burner to vary the PA/PC ratio and maintain a desired primary air to primary coal ratio at the outlet of the burner. Natural gas can also be supplied into the hollow plug as a supplemental fuel for cofiring at the outlet end of the burner.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: December 16, 1997
    Assignee: The Babcock & Wilcox Company
    Inventors: Albert D. LaRue, Hamid Sarv
  • Patent number: 5531973
    Abstract: A method for reducing NO.sub.x produced by the burning of fuels includes providing a hydrocarbon and nitrogen mixture to a plasma arc generator for producing NO.sub.x reducing precursors which are, in turn, provided near the burning of the fuel for reacting and reducing NO.sub.x emissions. These precursors include N, H, HCN, CH.sub.i and NH.sub.i, etc.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: July 2, 1996
    Assignee: The Babcock & Wilcox Company
    Inventor: Hamid Sarv