1、 目 录 中文摘要1 英文摘要2 1 绪论3 1.1 中串低变换系统概述3 1.2 饱和热水塔的作用5 1.3 湿气体的热力学性质5 1.4 饱和热水塔的平衡曲线与操作线7 1.5 循环水量8 2 本论10 2.1 变换系统基本工艺计算 10 2.2 系统内部分温度估计 12 2.3 水加热器的物料、热量衡算14 2.4 饱和塔的物料、热量衡算15 2.5 热水塔的物料、热量衡算16 2.6 饱和热水塔平衡线与操作线 17 2.7 理论板数计算 24 3 心得体会 26 参考文献27 附录28 1 填料式饱和热水塔工艺设计 摘 要: :本设计为年产三万吨合成氨厂变换工段饱和热水塔工艺设计，采用
2、能耗较 低的中串低流程。饱和热水塔是变换工段的主要热能回收设备。设计中对 水加热器、饱和塔和热水塔进行物料衡算，能量衡算，计算了饱和塔和热 水塔的平衡曲线和操作线。经反复试算调整，确定适宜的循环水量和两塔 理论塔板数。绘制了中串低变换系统工艺管道与仪表流程图。 关键词：中串低流程 饱和热水塔设计 填料式饱和热水塔工艺设计（汽气比 0.55） 2 Abstract: This design is a project for the technological procedure of the gas saturator/water heater column of the middle-stri
3、ng-low shift system, which running in ammonia plant of 30 000 t annually. Middle-string-low flow technological procedure is known for its lower energy costs. Gas saturator/water heater column is major equipment for heat recovery and comprehensive utilization in the shifting system. This design and o
4、peration directly affect the consumption of the system, which in the bottom place of the ammonia plant. We calculated the heat and matter in the water hotter and gas saturator and the water heater. The balance curve and the operating curve of the gas saturator/water heater column are calculated. The
5、 cycling water yield and the number of theoretical plates of the gas saturator/water heater column are calculated too. The flow diagram of the process pipe and instrument of the middle-string-low temperature shifting system has been drawn. 13 14 Keywords: middle-string-low temperature shifting flow process; gas
