中压甲铵冷凝器结垢原因分析及改造

Analysis of Cause for Fouling of Medium Pressure Carbamate Condenser and Improvement

分析了中压甲铵冷凝器结垢的原因，介绍了将中压甲铵冷凝器由四管程改为双管程的改造过程。改造后，结垢现象基本消除；系统稳定，操作弹性大，节约了检修费用；吨尿素氨耗降低5～6kg，日增产尿素35t，经济效益显著。

The cause for fouling of medium pressure carbamate condenser is analyzed, the transformation process of medium pressure cabamate condenser from four-tube passes to double-tube passes is introduced. After transformation, fouling phenomenon is basically eliminated; system operation is stable, its turn-down ratio is high, cost of overhaul is reduced ; the ammonia consumption per ton of urea reduces by 5 -6 kg, the output of urea increases by 35 t per day, giving very satisfactory economic benefits.