乙醇胺脱氨脱水工艺的研究.pdf

2008 年中国过程系统工程年会会议论文集 乙醇胺脱氨脱水工艺的研究 程华农，陈崇春，孙杰，郑世清 （青岛科技大学计算机与化工研究所，山东 青岛，266042） 摘要：乙醇胺生产能耗是影响产品成本的一个重要因素，其脱氨脱水单元占总能耗的主要部分。同国外先进工艺 相比，国内乙醇胺生产氨水浓度偏低，能耗偏大。在Aspen plus中建立了乙醇胺脱氨脱水过程模型，包括闪蒸塔、 脱氨塔和脱水塔。通过对不同氨水浓度下的脱氨脱水流程进行了模拟计算，表明90％以上氨水浓度更适合工业化 生产，节能效果显著。并以90％氨水浓度为例，说明各个塔的操作参数的优化和确定，如压力、温度、塔板数和 回流比等，为国内乙醇胺的工艺改造和新设计提供了参考。 关键词：乙醇胺；模拟；脱氨脱水；能耗 中图分类号：TQ021.8; TQ062 文献标识码：A 文章编号： Study on the process of separation ammonia and water from ethanolamines Cheng Huanong, Chen Chongchun, Sun Jie, Zheng Shi-qing （Research Center of Computer and Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042 ） Abstract: Energy consumption is important factor to production cost in ethanolamine industries. Energy needed in separation ammonia and water from crude product take main part of whole energy consumption. Comparing with the foreign advanced technology, the lower concentration of ammonia water cause more energy cost. A process model is set up using Aspen plus software tool, including flash tower, de-ammonia tower and dehydration tower. By simulating corresponding flow sheets under different ammonia concentration, the calculation results show that the energy cost is cut down considerably with 90% or more ammonia weight concentration, which is suitable to industrial production. In addition, a process with 90% ammonia concentration is used to illustrate the optimization and identification of operation parameters of each tower, such as pressure, temperature, tray number and reflux ratio. This work could be used as reference to retrofit and new design for the domestic ethanolamine industries. Key words: Ethanolamine; simulation; separation; ammonia; water; e