Daniel Harry Hutchinson
Engineers in Bakersfield, CA
License number
Colorado 17900
Issued Date
Feb 13, 1981
Renew Date
Jan 10, 1992
Expiration Date
Jan 10, 1992
Type
Professional Engineer
Address
Address
PO Box 9123, Bakersfield, CA 93389
Professional information
Method And System For Flue Gas Recirculation
US Patent:
5002484, Mar 26, 1991
Filed:
Mar 25, 1988
Appl. No.:
7/173323
Inventors:
Ruth E. Lofton - Bakersfield CA
Dale E. Robinson - Bakersfield CA
Daniel H. Hutchinson - Bakersfield CA
Dale E. Robinson - Bakersfield CA
Daniel H. Hutchinson - Bakersfield CA
Assignee:
Shell Western E&P Inc. - Houston TX
International Classification:
F24H 100
US Classification:
432222
Abstract:
A method and system for flue gas recirculation is disclosed which will minimize NOx production from hydrocarbon combustion. In the present invention a furnace having an oxygen-bearing primary source of combustion air, a mixing chamber, a combustion chamber in downstream communication with the mixing chamber and an exhaust section downstream of the combustion chamber is provided with a flue gas recirculation line. The recirculation line establishes communication between the exhaust section and the mixing chamber for the return of combustion products as a secondary source of combustion air which is relatively lean in oxygen and is combined with the primary source of combustion air in the mixing chamber. The ratio of flow rates for the primary and secondary sources of combustion air is controlled by a signal generated by a sensor which senses the oxygen concentration in the mixing chamber.
Steam Generating System With No.sub.x Reduction
US Patent:
5040470, Aug 20, 1991
Filed:
Nov 15, 1990
Appl. No.:
7/614360
Inventors:
Ruth E. Lofton - Bakersfield CA
Dale E. Robinson - Bakersfield CA
Daniel H. Hutchinson - Bakersfield CA
Dale E. Robinson - Bakersfield CA
Daniel H. Hutchinson - Bakersfield CA
Assignee:
Shell Western E&P Inc. - Houston TX
International Classification:
F23B 700
US Classification:
110234
Abstract:
A method and system for flue gas recirculation is disclosed which will minimize NOx production from hydrocarbon combustion. In the present invention a furnace having an oxygen-bearing primary source of combustion air, a mixing chamber, a combustion chamber in downstream communication with the mixing chamber and an exhaust section downstream of the combustion chamber is provided with a flue gas recirculation line. The recirculation line establishes communication between the exhaust section and the mixing chamber for the return of combustion products as a secondary source of combustion air which is relatively lean in oxygen and is combined with the primary source of combustion air in the mixing chamber. The ratio of flow rates for the primary and secondary sources of combustion air is controlled by a signal generated by a sensor which senses the oxygen concentration in the mixing chamber.