Combustion – Process of combustion or burner operation – Controlling or proportioning feed
Patent
1984-06-08
1986-03-18
Focarino, Margaret A.
Combustion
Process of combustion or burner operation
Controlling or proportioning feed
431 76, 236 15BD, 236 15E, 364510, F23N 102
Patent
active
045765707
ABSTRACT:
A method and apparatus for controlling the combustion of multiple fuels, especially fuels having diverse combustion air requirements. A heating rate demand signal indicative of the heating rate desired is generated and is compared with a fuel based fuel heating rate signal. The larger of the two signals is selected to be an air demand signal that serves as set point for a combustion air controller. The flow rates of each of the fuels being burned is monitored and the resulting signals are scaled and summed to produce the heating rate signal. The fuel signals are also scaled by factors reflecting the combustion air requirements of the fuels. The signals are summed and combined with the fuel heating rate signal to produce a feedforward signal which in turn is combined with a signal reflecting the measured combustion air flow to produce an equivalent air heating rate signal. This latter signal is communicated to the combustion air controller and if different than the air demand signal causes an adjustment of the combustion air controller. The equivalent air signal is also compared with the heat demand signal and the lower of these two signals is communicated to a fuel heating demand subsystem which controls the metering of the fuels. An 0.sub.2 set point generator modifies the feedforward signal should a deviation occur between the 0.sub.2 set point and the measured 0.sub.2 content of flue gas exhausted by the combustion process.
REFERENCES:
patent: 3049300 (1962-08-01), Lewis et al.
patent: 3369749 (1968-02-01), Siegmund et al.
patent: 3602487 (1971-08-01), Johnson
patent: 3722811 (1973-03-01), Osburn
patent: 3723047 (1973-03-01), de Livois
patent: 3734675 (1973-05-01), Osburn
patent: 4064699 (1977-12-01), Martz
patent: 4097218 (1978-06-01), Womack
patent: 4115862 (1978-09-01), Stewart
patent: 4138725 (1979-02-01), Ikemoto et al.
patent: 4162889 (1979-07-01), Shigemura
patent: 4173124 (1979-11-01), Fujii et al.
patent: 4187542 (1980-02-01), Ball et al.
patent: 4296727 (1981-10-01), Bryan
patent: 4330261 (1982-05-01), Sun
patent: 4459098 (1984-07-01), Turek et al.
Adams James
Belin Felix
Focarino Margaret A.
Republic Steel Corporation
LandOfFree
Automatic combustion control apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic combustion control apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic combustion control apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2303611