关于氨气提法尿素装置高压甲铵冷凝器配置的分析

Analysis Concerning Arrangement of High Pressure Carbamate Condenser in Urea Plant by Ammonia Stripping Method

意大利斯那姆氨气提法工艺自上世纪80年代末期引入我国以来,国内已有近30套氨气提法尿素装置,但国内的氨气提法尿素装置全部采用的是传统的单高压甲铵冷凝器流程,而在国外双高压甲铵汽凝器流程已广泛使用。介绍了单高压甲铵冷凝流程和双高压甲铵冷凝器流程的工艺特点;对比了2种流程的蒸汽平衡及中压蒸汽消耗。结果表明,采用双高压甲铵冷凝流程配置,其吨尿素中压蒸汽消耗比单高压甲铵冷凝器流程低150.31 kg,节能效果明显。

Since the italian Snamprogetti ammonia stripping method process has been imported into China at end stage in 1980, there were almost 30 sets of urea plants with ammonia stripping method in China, but in all inland urea plants with ammonia stripping method, the traditional process with sin- gle high pressure carbamate condenser was fully adopted, and the process with double high pressure carbamate condensers was widely used in foreign countries. Author has introduced the process features of single high pressure carbamate condenser and double high pressure carbamate condensers; has compared the steam balance and steam consume for the two kinds of processes. Result indicates that using arrangement of process with double high pres- sure carbamate condensers, the consume of middle pressure steam per ton of urea is 150.31 kg lower than that in process with single high pressure carba- mate condenser, the effect for saving energy is obvious.