Rotary Scrapers for Prilling Towers

Prilling Tower from outside

AMECO is the global leader for the supply of Rotary Scrapers, delivering its Bulk Handling equipment in fertilizers production plants throughout the world, in countries like Mexico, France, India or Indonesia.

Rotary Scrapers are mostly used in the Fertilizer Industry, where fertilizers such as ammonium nitrate, urea and NPK (nitrogen, phosphorus and potassium) are commonly manufactured as prills. Prills are formed by allowing drops of a melted prill substance to congeal or freeze in mid-air after dripping from the top of a tall Prilling Tower.

At the bottom of the Granulation Tower, a Prilling Tower Reclaimer is continuously rotating. The rotation movement enables to concentrate the granulated urea spread in all the circular surface of the base. It then goes into a discharge point leading to the downstream Conveyor.

Prilling Tower Scrapers are composed of a structural boom with scraping blades that rotate around a central point.

Rotation is made possible through a slewing drive, designed as a dual drive system. This Scraper System is designed for the Scraper to operate continuously even if one of the drives is on maintenance.

Depending on your requirements, AMECO can provide you with two different types of Rotary Scrapers: Flat Prilling Tower Reclaimers and Conical Prilling Tower Reclaimers.

Flat Prilling Tower Reclaimers

When the base of the Prilling Tower is flat, the Reclaimer Boom is horizontally laid. The discharge leading to the downstream Conveyor is usually located all along a line that crosses the Prilling Tower base.

Rotary Scraper for Flat Prilling Tower, GPN plant, Rouen, France

Rotary Scraper for Flat Prilling Tower, GPN plant, Rouen, France

Conical Prilling Tower Reclaimer

In this case, the discharge point into the downstream Conveyor is located on the center of the Prilling Tower base. The boom of the Reclaimer adjusts to the tower floor by adopting the same angle. This enables the urea prills to be conducted into this central point, discharging them into a downstream Conveyor by means of a chute.

Conical Rotary Scraper for urea installed at Engro Fertilizers in Daharki, Pakistan

Conical Rotary Scraper for urea installed at Engro Fertilizers in Daharki, Pakistan


AMECO’s Rotary Scrapers reference projects