Electrostatic precipitators of one 2×362MW units were imported from GEC UK and its ash handling system was designed to use air skewed slots.In recent years

along with increase of ash content in coal-fired and ash demand in market

handling capacity of ash handling system was gradually insufficient.The ash handling system was modified by using doubled-pipe pneumatic ash handing technology.After 3 year operation

doubled-pipe pneumatic ash handing technology was prior to other ash handling systems in that it had the advantages of no-obstruct pipe

high concentration

low flow velocity

less abrasion

and better ash adaptability

etc.