氮肥生产能量系统优化项目实施总结

介绍了氮肥生产能量系统优化项目工程的主要内容，包括变换流程由中串低改为全低变、利用低位能余热、采用蒸发式冷凝器代替冷却排管冷凝器、采用高效分离内件、脱碳系统增设能量回收装置、用水力喷射器代替蒸汽喷射器、采用高效蒸发式氨冷器、尿素系统增设预分离器和主要机泵增设变频装置、氨合成循环机改用透平循环机、改用次高压循环流化床锅炉并配备背压发电机组等措施，并对改造项目的节能量进行了核算分析。项目投用后，节能效果明显，达到了预期目的，吨合成氨总能耗（折标煤）由1．84t降至1．60t。

Sum-Up of Implementation of Projects for Energy System Optimization in Nitrogenous Fertilizer Production

An introduction is given to the main content of the projects for the optimization of the energy system in nitrogenous fertilizer production, including the change from the combination of high- and low-pressure shift conversion to all low-pressure shift, the utilization of low-level waste heat, the replacement of the cooling pipe condenser with the evaporative condenser, the adoption of high-effl- ciency separation intemals, the addition of an energy recovery unit to the C02 removal system, the re- placement of the steam ejector with the hydraulic ejector, the adoption of the high-efficiency evaporative ammonia cooler, the addition of a pre-separator to the urea system and of a frequency converter to the main pump, the change to the turbine circulator in ammonia synthesis, the change to the sub-high- pressure recirculating fluid-bed boiler, and the provision of the back-pressure generator set. A check analysis is made of the energy saved in the reform project. After the use of the project, the results of energy-saving are marked, and the expected target is attained, with the total energy consumption （as standard coal） per ton of ammonia dropping from 1.84 t to 1.60 t.