The Paper bears on the problems appearing before and after the Prism hydrogen recovery set of large ammonia plant was put into operation and deals with the solving measures.
介绍大型氨厂普里森氢回收装置投运前后存在的问题及对策；
In Jinxi Large fertilizer plant, through technical modification and operation optimization, restart up procedure of ammonia plant is speeded up.
介绍锦西大化肥装置通过技术改造、优化操作，加快合成氨装置恢复开车速度，缩短开车时间的经验。
To solve the problem of pipes vibration of large-sized compressor in ammonia plant, orifice plates are installed after thorough analysis of the causes of vibration, effectively solved the problem.
针对合成氨系统的大型压缩机组管系振动问题，深入分析了原因后，采取在管道中加装节流孔板的措施，使管系振动得到了有效控制。
The process to replace the catalyst of shifting furnace was introduced for large-sized ammonia synthesis plant; the requirements of type selection and filling method for catalyst were discussed.
介绍了大型合成氨厂低变炉更换催化剂的过程；论述了催化剂的选型要求和装填方法；阐明了催化剂还原过程中从还原前升温到还原初期、主期及末期的操作步骤和要求。
The model is trained with the operation data of a large scale ammonia plant. The results calculated by this model agree well with industrial operation data.
该模型是以BP网络为基础的多层网络，用实际操作数据对该模型进行了训练，获得了较好的过程模拟效果，该模型可用于大型氨厂转化系统操作分析。
The process to replace the catalyst of shifting furnace was introduced for large-sized ammonia synthesis plant;
介绍了大型合成氨厂低变炉更换催化剂的过程； 论述了催化剂的选型要求和装填方法；
The process to replace the catalyst of shifting furnace was introduced for large-sized ammonia synthesis plant;
介绍了大型合成氨厂低变炉更换催化剂的过程； 论述了催化剂的选型要求和装填方法；
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