Television – Special applications – Hazardous or inaccessible
Patent
1997-10-06
1998-06-30
Au, Amelia
Television
Special applications
Hazardous or inaccessible
110186, H04N 718
Patent
active
057741760
ABSTRACT:
An unburned carbon and other combustibles monitoring and control system for a fossil-fueled boiler, such as a pulverized coal fired boiler. An infrared imaging camera counts the moving hot particles entrained in the hot gases exiting the boiler and provides a first signal representative of the number of hot particles in the hot gases over a predetermined period of time. A signal processor is connected to the infrared imaging camera for counting the hot particles for receiving the signal representative of the number of particles in the hot gases and providing a second signal representative of the unburned carbon and other combustibles content of the fly ash produced by the boiler. In the preferred embodiment, the apparatus includes at least one air/fuel control element for controlling the air/fuel ratio of the fossil-fueled boiler and a control system connected to the control element for receiving the second signal representative of the unburned carbon and other combustibles content of the fly ash produced by the boiler and a predetermined set point for the unburned carbon and other combustibles content of the fly ash produced by the boiler, the control system being operable to adjust the air/fuel control element in response to the second signal and the set point.
REFERENCES:
patent: 4690634 (1987-09-01), Herngren et al.
patent: 4814868 (1989-03-01), James
patent: 4969408 (1990-11-01), Archer et al.
patent: 5010827 (1991-04-01), Kychakoff et al.
patent: 5069551 (1991-12-01), Brown
patent: 5488916 (1996-02-01), Bozzuto
Applied Synergistics, Inc.
Au Amelia
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