3.2万吨乙醇差压精馏装置设计毕业论文

毕 业 设 计（论 文）

3.2万吨乙醇差压精馏装置设计院（系、部）： 化学工程学院姓    名：年    级：专    业： 化学工程与工艺指导教师：教师职称：

2012年  6月 8日・北京

摘  要本设计提出节能型乙醇和水的精馏装置工艺,采用筛板式精馏塔,设计中采用泡点进料,其精馏是利用多次部分汽化和多次部分冷凝分离液体混合物的过程,在工业生产中,要求将大量混合液进行较为彻底分离进,须采用连续精馏,将原料液经原料预热器加热到指定的温度,进入精馏塔的中部,在塔的中部,在塔内进行精馏,顶上升蒸汽采用全凝器冷凝,将一部分打回流至塔内,其余部分以产品冷却器冷却后差额主储罐,优点,操作稳定,能保持塔内部分温度及组成均不变,自动化程度高,处理能力大,回流比取最小回流比的1.5倍,塔釜采用蒸汽加热，塔底产品冷却后送到储缺勤。本设计中，塔釜残液为高温液体，可利用比高温液体来预热原料液，此工艺能，高效，安全可靠，本设计对精馏塔的一些主要设计参数进行了演算。关键词：乙醇、泡点进料、筛板、精馏

AbstractRectification plant process, the present design of the energy-saving ethanol and water using sieve formula fractionator, the design used in the bubble point feed, the distillation is the use of multiple partially vaporized and multiple partial condensation process of separating a liquid mixture, inindustrial production, require large amounts of mixture into the more thorough separation requires the use of continuous distillation, the raw material liquid by the raw material preheater is heated to the specified temperature, into the fractionator in the middle, in the tower in the middle of the tower,distillation, the top rising steam using the full condenser condensate, will be part of the fight back to the tower, the rest of the product cooler cooling after the main difference between the storage tank, the advantages of stable operation, can keep the tower part of the temperature and composition were unchangedhigh degree of automation, processing power, the reflux ratio of the minimum reflux ratio of 1.5 times, the tower kettle with steam heating, bottom product is cooled and sent to the storage absenteeism. This design, the tower bottoms for hot liquids, can be used to preheat the raw liquid than the high-temperature liquid, this process can be efficient, safe and reliable, the design of some of the major design parameters distillation column calculus.Keywords：ethanol, bubble point feed, sieve distillation

目  录

摘  要 2Abstract 3目  录 4第一章  绪  论 4第2章  设计方案的确定 6第3章  主塔的物料衡算 8第4章  塔的工艺条件及物性数据计算 10第5章  关于气液负荷计算 15第6章  塔和板主要工艺尺寸计算 16第7章  筛板的流体力学验算 21第8章  塔板负荷性能图 25第9章  精馏塔的附属设备 33第10章 筛板塔设计计算结果筛板塔设计计算结果 35总  结 37参考文献 38符号说明 39致谢 42