🌱 Fertiliser
Ammonia and urea plant vacuum systems, prilling tower off-gas, evaporator vacuum and gas ejectors.
Fertiliser — Ejector Applications
Ammonia plant vacuum systems, urea evaporation and prilling tower off-gas
Urea Plant Vacuum Evaporation
Urea solution from the synthesis reactor (approximately 70–75% concentration) is concentrated to 99.7%+ melt by vacuum evaporation through two or three stages. The final evaporation stage operates at 2–5 Torr absolute, requiring a 3–4 stage steam ejector system to maintain the deep vacuum. The gas load contains ammonia, water vapour and CO₂ carryover — all of which are handled by the ejector without damage. DCM Shriram Fertilizers, a repeat customer of Primetech, uses these systems in their urea plants.
Ammonia Plant Gas Ejectors
Gas jet ejectors using high-pressure synthesis gas or nitrogen as motive fluid are used in ammonia plants for gas recirculation, mixing and compression duties in the synthesis loop. They handle pressurised gas streams at elevated temperatures and pressures, providing a simple and reliable alternative to reciprocating compressors for small-scale gas moving duties. Primetech designs gas ejectors to API 560 and customer specifications for ammonia plant service.