Furnaces – Process – Burning pulverized fuel
Patent
1989-11-22
1990-11-13
Lall:, Parshotam
Furnaces
Process
Burning pulverized fuel
110147, 110186, 110343, 122 22, 364510, 36455101, 364149, F23D 100, F23B 700, G01B 1100, G05B 1304
Patent
active
049694081
ABSTRACT:
A system for monitoring combustion of coal in a boiler detects coal composition and heating value using a bulk material analyzer and determines an air/fuel mixture so that when the coal is burned oxygen is available throughout the boiler and the wall temperature of the boiler is maintained below the metallurgical limit and the surface temperature below the ash fusion temperature of the coal where slagging is not desired. The temperature and pressure of steam in the boiler, fuel and air flow rates and temperature and oxygen content of the stack gases are supplied to a boiler model. The boiler model predicts how varying the air supply rate affects sensible heat loss. Periodic measurements of unburned carbon in the ash produced by combustion of the coal are correlated with the operation of the boiler at the time that the ash was produced to provide a basis for estimating unburned coal loss. An optimum air/fuel mixture is determined to minimize heat loss for a given steam production rate or to maximize steam production, using the estimate of unburned carbon loss and output from the boiler model, while at all times maintaining sufficient air flow to prevent oxygen depletion and acceptable wall temperatures.
REFERENCES:
patent: 4315730 (1982-02-01), Watson
patent: 4430963 (1984-02-01), Finet
patent: 4552098 (1985-11-01), Wynnyckyj et al.
patent: 4575334 (1986-03-01), Keyes, IV et al.
patent: 4621583 (1986-11-01), Kaski
patent: 4622922 (1986-11-01), Miyagaki et al.
patent: 4676734 (1987-06-01), Foley
patent: 4685072 (1987-08-01), Johnson et al.
patent: 4846081 (1989-07-01), Homer et al.
"On-Line Elemental Analyzer for Bulk Material", GAMMA-METRICS, 1987.
Ahmed M. Mushtaq
Archer David H.
Lall: Parshotam
Pipala Edward
Westinghouse Electric Corp.
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