POLLUTION CONTROL METHOD FOR BOILER PLANTS EMITTING FLUE GASES CONTAINING TOXIC AGENTS Russian patent published in 1995 - IPC

FIELD: fuel combustion. SUBSTANCE: signal indicating NO_⊗ content in flue gases at furnace exit and that showing NO_⊗ content in flue gases discharged into atmosphere are measured. Rate of NO_⊗ increment depending on NO_⊗ and rate of NO_⊗ signal variation are determined. Air flow at furnace inlet is corrected depending on rate of change of NO_⊗ signal. Air temperature at furnace inlet is controlled depending on rate of NO_⊗ increment. Flue gas discharge from furnace to atmosphere is corrected depending on value of NO_⊗ signal and rate of NO_⊗ increment. Flue gas discharge into atmosphere is measured and rate of flow of control flue gases into furnace is controlled depending on flue gas discharge into atmosphere using NO_⊗ content signals and discrepancy between measured and desired values of pressure drop. EFFECT: improved control of flue gases discharged into atmosphere. 3 dwg, 1 tbl