Prilling is the solidification of a melt (liquid droplets) into prills. The solidification is done in a tower using counter-current cold air.
Prilling is the solidification of a melt (liquid droplets) into prills (very round particles) inside a tower.
Falling by gravity from the top of the tower, the melt has the tendency to form very round droplets due to its surface tension. The air blown at the bottom of the prilling tower crosses the melt flow and crystallized the droplets into prills.
With air loop : in this prilling tower, the air is recirculated from top to bottom. The dusty air outlet from prilling tower is scrubbed and the scrubbed air is cooled and blown into the prilling tower.
Without air loop : in this prilling tower, the air is directly sent to the atmosphere after scrubbing.
ANGARSKY AZOTNO-TUKOVY ZAVOD, Russia (750 MTPD LDAN)