Problems existed in urea formaldehyde evaporation system in Snamprogetti ammonia stripping process were described.The analysis showed that the formaldehyde flow fluctuation was the main reason causing the urea formaldehyde reactor pressure fluctuation,leading to the vaporization in the urea melt pump.The improvement measures were taken to reduce the flow fluctuation,therefore stabilize the pressure of urea formaldehyde reactor,avoiding vaporization,decreasing the risk of equipment failure,ensuring urea product quality and prolonging the operation cycle of prilling system.
维普
万方数据