FIELD: process engineering.
SUBSTANCE: invention relates to microwave-gradient activation of coal fuel with the help of protective coat. This is performed by bringing microwave effects to coal fuel to activate coal particle. Note here that coal lump surface is coated with protective film to arrest the escape of volatiles during the microwave activation. Note here that pressure inside coal lump is over 10 atm and does not factures nor crack in the film. Protective film availability allows arresting the escape of volatiles and to sustain temperature approximating to 700°C without film fracture and crack formation.
EFFECT: higher completeness of combustion, lower rate of boiler inner surface slagging.
3 ex
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