The Operating experience of Nitrophosphate Plant

Pak Arab fertilizers private Limited has been operating its nitrophosphate plant based on the ODDA process since 1978. The technology has been supplied by Stamicarbon Holland and engineering by Udhe Germany. Nitrophosphate route provides an interesting avenue for producing an agronomically balanced complex fertilizer. Numbers of improvements are made in original design since after installation to meet the performance guarantees. Rock Phosphate is the main raw material for NP production. Plant was designed on Jordan rock and later Morocco, Egyptian and Algerian rock phosphates and their blends are tested. The other bottle neck was CN separation centrifuges. Failure of this equipment kept the plant operation on low rate hence these were replaced with Filter drums a slow moving unit. This helped to improved production quality and service period. To improve environment, NOx abatement Urea solution is added to Dissolving reactor. Two new reactors added to system to control reaction rate and anti foaming consumption was reduced drastically and it also helps in increasing production capacity of plant. The main thrust of this paper is to present the operating experience of nitrophosphate plant, improvements made at this complex to improve reliability of complex.