Furnaces – Process – Treating fuel constituent or combustion product
Patent
1992-05-20
1992-12-22
Favors, Edward G.
Furnaces
Process
Treating fuel constituent or combustion product
110264, 110347, 422169, 42324401, F23J 1100, F23J 1500
Patent
active
051726440
ABSTRACT:
A method and apparatus for suppressing multiple pollutants is disclosed. The apparatus includes a slagging combustor which effectively reduces the bulk of the NO.sub.x and SO.sub.2 produced through the combustion of coal. The slagging combustor also converts the bulk of the noncombustible material in the coal into a vitrified waste product. Following utilization of their thermal energy, the combustion products from the slagging combustor are conveyed to a lignite coke system. The lignite coke system provides additional suppression of the NO.sub.x, SO.sub.2, and solid noncombustible byproducts. In addition, the lignite coke system suppresses the gaseous toxic pollutants that exit the slagging combustor with the combustion gases. The spent coke is recycled to the combustor where its fuel value is used to reduce raw fuel requirements and noncombustible materials captured by the coke exit the combustor as part of the vitrified slag. In sum, extremely efficient reduction of NO.sub.x, SO.sub.2 and solid noncombustible pollutants is realized, gaseous toxic pollutants are suppressed, and solid waste byproducts are in a vitrified form which will resist future leaching.
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Electric Power Research Institute Inc.
Favors Edward G.
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