【作者】 张宝忠；

【导师】 何志敏； 冷家厂；

【作者基本信息】 天津大学 ， 化学工程， 2007， 硕士

【摘要】 随着材料科学的发展,性能优良的分子筛吸附剂的开发和应用范围不断拓展,并在能源、环境等重要领域发挥更大的作用。本文首先对分子筛吸附剂的发展历程、主要性能及测试方法和重要的应用领域,进行了系统总结。在此基础上,对天津石化芳烃车间二甲苯的吸附分离进行工业试验。研究结果表明,天津石化采用UOP公司新型ADS-27吸附剂,对二甲苯的纯度由99.70%提高到99.89%,收率由97.5%提高到99.0%,获得了先进的吸附剂操作数据和经验。此外,本文从工艺条件、控制系统、机械泄漏、吸附剂本身性能、床层压差等方面进行了全面、详实的分析、研究,确认吸附剂强度偏低和格栅局部损坏进而造成个别床层压差超高是根本原因。在不停车检修的情况下,采取反冲洗方案缓解了运行压力,使生产得以延续。在检修中,提出格栅修复、增加分配网、改变组件等可行的改进措施,应用到实践中,解决了实际生产难题,同时为吸附剂的工业应用提供了极其宝贵的经验。更多还原

【Abstract】 With the development of material science, well-performed molecular sieve adsorbent has been under researching and its application area is widening with the time. It is playing more and more significant role in some important fields like energy and environment.This thesis has summarized the history of the development of molecular sieve adsorbent, its nature and test method as well as major application area. Industrial trial has been conducted on the Adsorption & Separation System of PX Unit of Tianjin Petrochemical Aromatics Business. The research concludes that the purity of PX was improved from 99.70% to 99.89% and the yield from 97.5% to 99.0% with the application of new ADS-27 Adsorbent. Excellent operation data and experience has been obtained from the research.In addition, the thesis has made thorough and elaborate analysis and study from the perspective of process condition, control system, mechanical leakage, adsorbent nature and differential pressure between beds. It comes to a conclusion that relevant weak strength of adsorbent and local damage of grids is the fundamental reason of super high differential pressure between particular beds. Back flushing program was carried out at non-stop condition in order to release the burden of operation and help to continue the production. During the overhaul period, feasible improvement measures, e.g., to repair grids, add distribution pipes and alternate BIA were brought forward and put into practice, which has helped in solving the serious practical problem and provided extremely precious experience for us in industrial application of adsorbent.更多还原