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在尿素生产中,NH_3、CO_2、H_2O、N_2、O_2等气相组份的分析,对实现整个系统的稳定生产是极重要的一环。在 CO_2汽提法尿素生产装置中,用工业色谱仪每十分钟分析一次合成塔气相组份,根据分析结果,及时调整 NH_3与 CO_2的进料比,可以使装置达到最佳操作条件,提高产量和质量;对高压洗涤器出口气相组份进行全分析,可以予防工艺过程中的燃烧和爆炸现象。当工艺控制参数成熟时,还可以与电子计算机结合,作闭环控制。
In the urea production, the analysis of gas components such as NH_3, CO_2, H_2O, N_2, O_2 and so on is very important for the stable production of the whole system. In CO_2 stripping urea plant, the gas chromatogram of the synthesis tower is analyzed every 10 minutes by industrial chromatograph. According to the analysis results, the feed ratio of NH_3 and CO_2 can be adjusted in time to achieve the best operating conditions and increase the yield And quality; full analysis of the gas phase components of the outlet of the high-pressure washer can prevent the phenomenon of combustion and explosion during the process. When the process control parameters mature, but also can be combined with the computer for closed-loop control.