筛板式精馏塔的设计毕业设计（论文）word格式.doc

分类号 单位代码 密 级 学 号 0606210265 学生毕业论文 题目 筛板式精馏塔的设计 作者 指 导 教 师 专业技术职称 硕 士 学科（专业） 化 答 辩 日 期 5月13日 2010 摘 要 本设计为分离乙醇-水混合物,采用筛板式精馏塔.生产时，原料液不断地经预热器预热到指定温度后进入加料板，与精馏段的回流液汇合逐板下流，并与上升蒸气密切接触，不断地进行传质和传热过程，最后进入再沸器的液体几乎全为难挥发组分，引出一部分作为馏残液送预热器回收部分热能后送往贮槽。剩余的部分在再沸器中用间接蒸汽加热气化，生成的蒸气进入塔内逐板上升，每经一块塔板时，都使蒸气中易挥发组分增加，难挥发组分减少，经过若干块塔板后进入塔顶冷凝器全部冷凝，所得冷凝液一部分作回流液，另一部分经冷却器降温后作为塔顶产品（也称馏出液）送往贮槽。设计中采用泡点进料,回流比为最小回流比的1.5倍.本文就是对此精馏塔的一些主要的设计数据进行计算. 关键词：精馏塔 筛板 论文类型:其他 ABSTRACT This design to separate the ethyl alcohol - water mixture, uses the lamina cribrosa type rectifying tower. When production, raw material fluid preheating enough to after assigning thetemperature enters the feed plate unceasingly after the pre-heater, with the rectifying section phegma convergence by the board lower reaches, and with the rise vapor intimate contact, carries on the mass transfer and the heat transfer process unceasingly, finally enters reboilers liquid nearly to feel embarrassed the volatile component, draws out a part delivers the pre-heater recycling partial heat energies after the distill residue to escort to the storage tank. The surplus part in the reboiler with the indirect steam heating gasification, the production vapor enters in the tower by the board rise, when every time after together column tray, makes in the vapor the easy volatile component to increase, the difficult volatile component to reduce, after passing through certain column trays, enters the tower to go against the condenser complete condensation, an obtained condensate part makes the phegma, another part after chiller temperature decrease goes against the product as the tower (also saying that distillate) escorts to the storage tank. In the design uses bubble point feeding, the reflux ratio for smallest reflux ratio 1.5 times. This article the rectifying tower some main design feature carries on the computation regarding this. Key wo