【作者】 尹飞奇；

【导师】 杨运泉；

【作者基本信息】 湘潭大学 ， 化学工程， 2008， 硕士

【摘要】 目前,国内醋酸乙烯装置醋酸锌-活性炭催化剂制备多为二十世纪七、八十年代开发的每批处理1m3活性炭的工艺技术,由于该技术生产装置床层高,载体上喷淋吸附催化活性物质不均匀;流化床正压操作,现场操作环境恶劣;生产尾气采用湿捕除尘,废水排放多,生产环境差;现场控制少,自动化程度低,产品质量不稳定,已难以满足醋酸乙烯工艺技术进步及生产规模日趋大型化要求。为此,急需开展大处理量活性炭的醋酸锌-活性炭催化剂配制技术及装备研究,开发一套产品质量稳定、均匀、生产环境好、自动化程度高的催化剂制备技术,满足醋酸乙烯装置大型化对合成催化剂的需求,同时为PVA产业发展作好醋酸乙烯合成催化剂配制技术储备。本研究以某厂新建“50kt/a PVA及配套工程”项目批处理3m3活性炭的醋酸锌-活性炭催化剂装置为依托,通过对1m3/批生产装置工艺技术消化吸收、技术创新,提出了优化的醋酸锌溶液制备,溶液输送管道自动清洗,流化床喷淋、吸附、干燥一体化,尾气除尘排放的工艺技术路线,设计出了结构合理、批处理3m3活性炭的醋酸乙烯合成催化剂喷淋、吸附、干燥流化床设备,该设备经fluent软件仿真计算,无论是气体分布板设计,还是流化床内构件布置,都得到了满意的仿真计算结果。通过研究分析,优化了生产工艺参数和工艺设备结构,开发设计了醋酸锌-活性炭催化剂成套工艺技术及装备,利用开发的成套技术及装备生产的醋酸锌-活性炭催化剂,满足了用户要求。此成套技术的开发应用,为其推广应用以及更大规模PVA生产装置的催化剂配制、开发、放大搭建好了技术平台。更多还原

【Abstract】 At present, zincum acetate-active carbon catalyst is mostly produced by the technology which was developed between the 1970s and 1980s in domestic vinyl acetate plant.The capacity is 1m3 in batch processing.The active component can’t be distributed uniformly because of high bed; The operating condition is very bad because of the positive pressure in fluidized bed;The waste water is large because of wet type dust collector.The product quality is fluctuation because of little local control and low automatic level.So the old technology can’t meet the requirements of technology advancement and increasing production scale. Thus it is urgent to investigate a preparation technology and equipment for zincum acetate-active carbon catalyst production, and develop a catalyst preparation technology of stable quality, good environment, and high automatic level in order to meet the large scale ethylene apparatus’s needs and provide technological reserve for PolyVinyl Alcohol (PVA) industry.This research is based on the zincum acetate-active carbon catalyst device with batch processing load of 3m3 active carbon of 50kt/a PVA and auxiliary project. By digestion and technical innovation, a technical route has been proposed which includes optimal zincum acetate solution preparation, solution conveying by pipe and applying auto-cleaning technology, spraying, absorption and drying integration by fluidized bed and tail gas purification. A well-structured fluidized bed of spray, absorption and drying integration is designed with batch processing load of 3m3 active carbon,which is simulated by using Fluent software. The simulating results show that the design of air distribution plate and arrangement of internals parts are both satisfying.Through investigation and analysis, the process parameters and the technological equipment structure are optimized, zincum acetate-active carbon catalyst process technology and equipment package is developed and designed. The quality of catalyst can meet the customer’s needs.The development and application of this packaged technology has built a technical platform for its promotion, larger scale catalyst preparation and development in PVA plant.更多还原