METHOD OF MAKING NONPOLLUTING WASTELESS COAL-BURNING PLANT WITH COMPLEX NON-CATALYTIC CLEANING OF FLUE GASES OF NITROGEN OXIDES AND TRAPPING OF FLY ASH, ITS GRINDING, FREE CARBON AFTERBURNING, RECTIFICATION AND COMPLETE RECOVERY Russian patent published in 2013 - IPC B01D53/00 

FIELD: process engineering.

SUBSTANCE: invention relates to disposal of man-made wastes. Selective catalytic cleaning of flue gases from nitrogen oxides comprises feeding premade steam-gas reducing carbamide-based mix into coal-burning plant fuel firing unit gas duct with flue gas flow temperature of 700°C-1200°C. Volume of fed flow is selected to make 800-1200 kg/h depending upon operating heat load of fuel firing unit. Fly ash in trapped by electric filters using nonuniform DC electric field of 0.78-1.0 A and 40-62 kV with power factor of 0.6-0.8 at reduction time of 2-3 ms after electric filter breakdown. Fly ash is removed from electric filters by intermittent automatic shaking of said filters by air fed at 5-6 MPa from stationary compressor station.

EFFECT: higher degree of separation.

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