毕业论文：《年产180万吨催化裂化反应再生系统的设计计算》.docVIP

PAGE 精品 摘 要 本设计以大庆常压渣油为原料，对处理量180万吨/年催化裂化反应再生系统进行了设计计算。我们知道石油对于人类来说是一种非常重要的资源。常减压工艺来加工原油得到的轻质汽油只占原油的10%-40%，其余为重质油和渣油，而且某些轻质油的质量也不高，满足不了国防﹑工农业和人们日常生活的需要。随着国民经济和国防工业的日益发展，以及对轻质油需求不断增加，对油品质量要求也日趋严格，这种供求矛盾同时也促进了炼油工业的发展。 大庆常压渣油氢碳比高，重金属含量低是较好的渣油催化裂化原料，根据大庆常压渣油的特点和市场对柴油的需求情况，设计采用柴油加工方案。由于渣油催化裂化的焦炭产率高，对再生器的烧焦能力要求较高，故选用烧焦罐式再生器以实现高效完全再生。采用提升管反应器和较先进的进料雾化技术、汽提技术、提升管出口快速分离技术以及高温短接触技术。本次设计进行了燃烧计算，反应系统、再生系统的热平衡计算，对再生器、提升管反应器、反应沉降器、汽提段、外取热器、辅助燃烧器的结构尺寸和旋风分离器、空气分布器进行了设计计算，还进行了两器压力平衡的计算。设计根据催化裂化的基本理论和工艺计算方法，借鉴现有工业装置的操作数据，得到的能够满足工艺要求的设计结果。 关键词：催化裂化；反应再生；渣油；工艺计算 ABSTRACT As we know,petroleum is a very important energy resouce to the mankind.By the Astmospheric and vacuum distillation process can only light fuel oil be obtained which amount to 10％-40％ of crude oil.And the remainder is heavy and the residuum some of the light oil are quite poor in quality,straight run produts form the atmospheric and vacuum distillation plants can not satisfy the need of national defense industry,agriculture and people’s daily life in quality,quanatity and variety.With the development of the national defense,the need of light oil are growing more and more serious and products in better quality are needed.The contradiction also spurs the development of the oil refining industry. DAQING atmospheric residue,which has higher H/C ratio and lower content of heavy metals is good feedstock for RFCC.According to the characters of DAQING atmospheric residue and market demands,a gasline fuels scheme is adopted in design.A high efficient and complete coke－bnrning regenerator having high burning capacity was adapted because much coke was produced during RFCC process.Riser reactor,atomization of feedstock,dry gas lifting technology,fast separation technology of riser reactor,high temperature and short contact time technology were adopted.Coke burning calculation and thermal equilibrium calculation of reactor and regeneration system were carried.The structure size of regenerator.riser reactor,stripping stage, ex