Sable Chemicals, Zimbabwe: Ammonium Nitrate Evaporator

The Sable Chemicals Ammonium Nitrate Evaporator produces a high grade ammonium nitrate for prilling in the clients’ prilling facility. The 1st Effect Evaporator processes approximately 40000 kg/hr of 83% Ammonium Nitrate using a steam driven vacuum Falling Film Evaporation stage.

The concentrated AN liquor is fed into the 2nd Effect Evaporator, which has an upper evaporator section and a lower mass transfer section within a single unit. The air used for the Evaporation in the 2nd Effect is supplied by a high pressure fan assembly. The vapour / air mixture leaving the 2nd Stage Evaporator is vented to atmosphere. All the steam and process condensate from the plant is recovered and returned to the client as process water.