Experiments have proved that when the dust concentration in flue gas is treated to 15mg/Nm3, the residual dust is ultrafine particle, which is smaller than PM2.5 and very difficult to be captured through common methods, like electrical precipitator, bag-type filter and so on. Based on our project experience, we have explored our own integrated solution to make dust emission lower than 5mg/Nm3. On the condition that dust concentration from precipitator outlet is treated lower than 15mg/Nm3, the technical route we applied is flue gas cooling and waste heat recovery unit at absorber inlet(optional)+ enhanced dedusting equipments set in absorber(including enhanced tray structure and high efficient demister).
Main technical specification
Absorber tower outlet soot concentration ≤5 mg/Nm3 (need the outlet concentration of precipitator ≤ 15mg/Nm3)
Demister outlet droplet concentration ≤30 mg/Nm3
Tray pressure drop ≤200Pa, high efficient demister pressure drop ≤250Pa