HAMID SARV
Engineers in Canton, OH

6386863, May 14, 2002

Apr 18, 2000

09/551066

Hamid Sarv - Canton OH
Jeffrey A. LaRose - Stow OH
Albert D. LaRue - Uniontown OH
Peter W. Waanders - Wadsworth OH

The Babcock Wilcox Company - New Orleans LA

F23C 700

431184, 431 9, 431183, 239405, 239406, 2394025

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.

5697306, Dec 16, 1997

Jan 28, 1997

8/789049

Albert D. LaRue - Uniontown OH
Hamid Sarv - Canton OH

The Babcock & Wilcox Company - New Orleans LA

F23C 112

110261

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. The amount of core air supplied is based upon (1) the coal flow rate being provided to the burner, in lb/hr, and (2) the percent volatile matter content (%VM) in the coal being burned.

5827054, Oct 27, 1998

Jan 11, 1996

8/584785

Hamid Sarv - Canton OH
Jeffrey A. LaRose - Stow OH
Albert D. LaRue - Uniontown OH
Peter W. Waanders - Wadsworth OH

The Babcock & Wilcox Company - New Orleans LA

F23C 700

431184

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.

5807094, Sep 15, 1998

Aug 8, 1997

8/908550

Hamid Sarv - Canton OH

McDermott Technology, Inc. - New Orleans LA

F23C 508

431177

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.

5829369, Nov 3, 1998

Nov 12, 1996

8/747319

Jennifer L. Sivy - Alliance OH
Larry W. Rodgers - Canton OH
Albert D. LaRue - Uniontown OH
Keith C. Kaufman - Canton OH
Hamid Sarv - Canton OH

The Babcock & Wilcox Company - New Orleans LA

F23C 110, F23C 112

110347

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.

7430970, Oct 7, 2008

Jun 30, 2005

11/171027

Albert D. LaRue - Uniontown OH, US
Alan N. Sayre - North Canton OH, US
William J. Kahle - Canal Fulton OH, US
Hamid Sarv - Canton OH, US
Daniel R. Rowley - Alliance OH, US

F23D 1/00, F23D 1/04

110347, 110261, 431 8, 431 9, 431 10, 431182, 431183, 431187, 431188

A new burner apparatus and method of combusting fossils fuels for commercial and industrial application is provided wherein the new burner apparatus achieves low NOemissions by supplying oxygen to the center of the burner flame in as manners so as to create a fuel rich internal combustion zone within the burner flame.

8113824, Feb 14, 2012

Jun 1, 2006

11/444779

Hamid Sarv - Canton OH, US
Albert D. LaRue - Uniontown OH, US
William J. Kahle - Canal Fulton OH, US
Alan N. Sayre - North Canton OH, US
Daniel R. Rowley - Alliance OH, US

F23M 9/00

431182, 431184, 431185, 431187, 431285, 431354, 110261, 110262, 110264, 110347, 239415, 239427

A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.

7491055, Feb 17, 2009

Jul 18, 2005

11/183512

Hamid Sarv - Canton OH, US

F23D 14/00

431 5, 431 10, 431 12

A method is disclosed for reducing the NOemission of fossil fuel burners. The method creates fuel-rich and fuel-lean zones within the boiler to enhance the removal of NOspecies by creating a plurality of NOreducing precursors.

5531973, Jul 2, 1996

Feb 23, 1995

8/393600

Hamid Sarv - Canton OH

The Babcock & Wilcox Company - New Orleans LA

B01D 5356

423235

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.

2009008, Apr 2, 2009

Nov 15, 2007

11/940575

Hamid Sarv - Canton OH, US

F23C 5/08, F23C 7/00, F23D 23/00, F23L 7/00, F23N 3/00

110345, 110265, 110347, 431181, 431278

A method and apparatus for reducing NOemissions in a coal burning furnace of a power plant without utilizing techniques downstream of the furnace, such as SCR and SNCR, is provided. In a primary combustion zone, a fuel is combusted in the presence of a first oxidant gas comprised substantially of N, to produce a first effluent gas that include one or more NOspecies. Downstream a re-burn zone is operated in a sub-stoichiometric manner, combusting a second fuel in presence of the first effluent gas and a second oxidant wherein the second oxidant gas comprises a stream of oxygen. The effluent gas from the re-burn zone is introduced to overfire airflow so as to establish a super-stoichiometric zone prior to discharged from the furnace.