Gary M Scoggin

US Patent:

20040175663, Sep 9, 2004

Filed:

Mar 6, 2003

Appl. No.:

10/383021

Inventors:

M. Shannon Melton - Tulsa OK, US
Donald Zetik - Tulsa OK, US
Dan Loveless - Collinsville OK, US
Frank Pickell - Friendswood TX, US
John Varesic - Tiki Island TX, US
John Brinly - Houston TX, US
Gary Scoggin - Texas City TX, US

International Classification:

F23N001/00

US Classification:

431/009000, 431/010000, 431/012000

Abstract:

A method for combusting fuel in a fired heater having one or more burners, the method comprising: (a) combusting at least a portion of the fuel in the presence of an oxidizer in the burners, generating heat and producing a flue gas; and (b) recycling at least a portion of the flue gas to the burners; wherein step (a) and step (b) are conducted in a manner such that the combusting takes place in a combustion regime represented by wherein w represents a mole fraction of oxygen in the oxidizer, x represents a recycle ratio of the flue as measured in moles of flue gas/mole of oxidizer; wherein y represents a temperature of the flue gas in Fahrenheit recycled to the burners; and wherein z represents a heating value of the fuel in Btu/scf LHV.

US Patent:

20060234172, Oct 19, 2006

Filed:

Feb 18, 2004

Appl. No.:

10/545253

Inventors:

M. Melton - Tulsa OK, US
Dan Loveless - Collinsville OK, US
Frank Pickell - Friendswood TX, US
John Varesic - Tiki Island TX, US
John Brinly - Houston TX, US
Gary Scoggin - Texas City TX, US

International Classification:

F23G 7/08

US Classification:

431005000

Abstract:

A method for combusting fuel in a fired heater having one or more burners, the method. comprising: (a) combusting at least a portion of the fuel in the. presence of an oxidizer in the burners, generating heat and producing a flue gas; and. (b) recycling at least a portion. of the flue gas to. the burners; wherein step (a) and step (b) are conducted in a manner such that the combusting takes place in a combustion regime represented. by 4,500−7554.8−933.72x+64.960x+0.47705y−0.55680z22,500; W wherein w represents a mole fraction of oxygen. in the oxidizer, x represents a recycle ratio of the flue as measured in moles of flue gas/mole of oxidizer; wherein y represents a temperature of the. flue gas in Fahrenheit recycled to the burners; and wherein. z represents a heating. value of the fuel in Btu/scf LHV.