| abstract |
The invention relates to a flue gas desulfurization, dust removal and denitration ultralow emission system for a lime rotary kiln, which comprises a rotary kiln and a preheaterThe system comprises a cyclone dust collector, SDS dry desulfurization equipment, a bag-type dust collector, medium-low temperature SCR denitration equipment and a draught fan; the method comprises the steps of preheating flue gas generated by a rotary kiln through a preheater, removing large-particle dust in smoke dust through a cyclone dust collector, performing desulfurization and drying through SDS dry-process desulfurization equipment, sequentially performing dust removal and denitration through a bag-type dust collector and medium-low-temperature SCR denitration equipment, discharging the flue gas through a draught fan, and finally discharging the flue gas through a chimney. The flue gas can contain dust and SO after being treated 2 、NO X And the final emission concentration of harmful substances reaches: SO (SO) 2 ≤35mg/Nm 3 ，NO x ≤50mg/Nm 3 Dust is less than or equal to 5mg/Nm 3 (ii) a The treated smoke is discharged into the atmosphere, so that the environment is not polluted, the human health is prevented from being damaged, the growth of animals and plants is protected, and the atmospheric environment is protected. |