BOILER OILLESS STARTING SYSTEM Russian patent published in 1997 - IPC

FIELD: thermal power stations. SUBSTANCE: system has main and additional lines for pulverized fuel feed from bin 1 to boiler starting burner 5. Additional line 9 has rated-length heat treatment section 10 in the form of vertical loop with transfer gas duct 11 and gate valve 12 to control pulverized fuel residence time in hot-gas zone, these gases being additionally heated in additional heater 13 mounted at inlet of line 9. Throttling device 16 in the form of contracted duct of rated sectional area preventing fire jump from burner 5 to heat treatment section is installed at outlet of line 10. Preignition chamber 14 is installed upstream of burner 5 and connected to throttling device. Burner incorporates flame sensors 18 connected through actuator to pulverized fuel feeders 2, 3. Crossover tube 15 connecting pre-combustion chamber 14 to burner 5 houses electric ignition device 8. EFFECT: improved design. 1 dwg