我厂是国内第一家运行的年产四万吨水溶液全循环法小尿素厂。目前装置规模为:合成氨60000吨/年、尿素100000吨/年,与尿素系统配套的两套脱碳装置,均采用1.7MPa的碳酸丙烯酯(简称碳丙)脱碳。一期脱碳系统自1986年6月投运以来,碳丙消耗一直较高,年平均在1.5kg/1NH_3～2.5kg/1NH_3,仅此一项使吨氨增加成本15元～20元。经过分析,我们认为造成碳丙消耗高的原因有以下几点: Our factory is the first run in the country with an annual output of 40,000 tons of aqueous solution of small urea cycle plant. At present, the scale of the plant is: 60000 tons of synthetic ammonia / year, 100000 tons of urea / year. Two sets of decarburization equipment matched with urea system adopt decarbonization of 1.7MPa propylene carbonate. Since the first phase of decarbonization system put into operation in June 1986, carbon and carbon consumption has been high, with an average annual 1.5kg / 1NH_3 ~ 2.5kg / 1NH_3, only one of the tons of ammonia to increase the cost of 15 yuan to 20 yuan. After analysis, we think the reasons for the high consumption of carbon and carbon include the following: