METHOD FOR BOILER UNIT OPERATION Russian patent published in 2012 - IPC F22B31/00 F23K5/02 

FIELD: power industry.

SUBSTANCE: method includes liquid fuel spraying, its delivery to boiler burner in ratio with respective air quantity and fuel burning. In process of boiler unit start-up liquid fuel with low viscosity is used for heating of furnace volume, at that in parallel with heating of furnace volume liquid fuel with high viscosity up to temperature of 80-100°C and after furnace volume heating when temperature of water reaches 50-60°C in boiler tubes; then supply of liquid fuel with low viscosity is reduced to zero with its simultaneous replacement by heated liquid fuel with high viscosity; further in normal operation mode liquid fuel with high viscosity is burnt in boiler unit, moreover in process of boiler unit shutdown supply of liquid fuel with high viscosity is reduced to zero with its simultaneous replacement by heated liquid fuel with low viscosity, and shutdown process should be completed only with combustion of liquid fuel with low viscosity. Moreover water-fuel emulsion (received by dispersion of oil-containing water and liquid fuel with high viscosity) is used in normal operation mode of boiler unit.

EFFECT: uninterrupted start-up of boiler unit notwithstanding ambient temperature and viscosity of heavy fuel.

2 cl, 1 dwg