合成氨毕业设计摘 要 合成氨变换工段工序是合成氨生产中的重要一步，也是较为关键的一步，因为能否正常生产出合格的压缩气，是后面的所有工序正常运转的前提条件。因此，必须控制一定的工艺条件，使转化气的组成，满足的工艺生产的要求。 在本设计中，首先介绍中低温变换的意义，然后根据已知的气体组成，操作条件，采纳了中变串低变的工艺流程路线。首先对中，低变进行了物料和热量衡算，确定催化剂最佳温度曲线，催化剂用量，高度，根据计算结果对主要设备选型，最终完成了本设计的宗旨。设计中一共有中变炉、主换热器、低变炉几个主要设备，并且还对中变炉进行了机械强度的计算及校核。最后根据设计结果，绘制出合成氨中-低变换工艺的带控制点的流程和主要设备图。 关键词：中-低温变换；一氧化碳；变换炉； 1 Abstract Section of synthetic ammonia transformation process is an important step in ammonia production, is more crucial step, because a normal production of qualified compressed air, is all the processes behind the prerequisite for the normal operation. Therefore, certain conditions must be controlled so that the composition of transformation of gas to meet the requirements of the production process. In this design, first introduced in the low temperature shift of meaning, then according to the known gas composition, operating conditions, using variable string line of low-change process. First of all, the low variable for the material and heat balance, determine the optimal temperature curve of the catalyst, catalyst amount, height, according to the results of major equipment selection, the final completion of the purpose of this design. Design of a total, in the temperature shift, the main heat exchanger, low-temperature shift of several major equipment. And also on the temperature shift to the mechanical strength of calculation and checking. Finally, design results, drawing out the ammonia in the - low shift process control points wi...
