Prilling is a technology used to produce prills with a diameter of a few millimetres. A liquid is injected into a prilling bucket during the prilling process. The prilling bucket is mounted on a prilling machine at the top of a prill tower. The rotating prilling bucket ensures that the liquid falls down in the tower as droplets.
During the process the droplets are converted into prills with a specific size through a combination of cooling and crystallising. The prills are discharged from the prill tower floor by using a rotating scraper and a conveyor belt.
The prilling process is applied in the following (this is not an exhaustive list):
Fertiliser industry: Urea, AN (ammonium nitrate), CAN (ceric ammonium nitrate), NP, NPK
Chemical industry: NaOH (sodium hydroxide), BPA (bisphenol A)
Capacities may vary between 60 and 3000 metric tons per day
Kreber has been producing prilling machines of the “Milkmaid” type for more than 40 years in different standard models depending on the required capacity. Read more >>
Prill tower scrapers
Rotating prill tower scrapers are used at the bottom of a prill tower to sweep the crystallised prills on to a conveyor belt The scrapers consist of a central drive under the prilling floor and 2 arms. Read more >>
BPA tower total design
We will calculate the required quantity of cooling air and the tower diameter and height for our customers based on the required capacity and average prill size. Read more >>