年产9.8万吨异丙醇装置丙烯精制工艺设计.doc

年产9.8万吨异丙醇装置丙烯精制工段工艺设计 ----脱乙烷塔部分 摘 要 丙烯是石油化工的原料之一，在原油加工中具有重要作用。由裂解气净化与分离工段的丙烯精馏塔分离出的丙烯除了用于生产聚丙烯外，还大量地作为生产丙烯腈，丁醇，辛醇，环氧丙烷，异丙醇等产品的主要原料。为了更好的提高生产能力，本着投资少，能耗低，效益高的想法，本设计根据设计任务书中确定的生产任务进行的，塔设备一般分为级间接触式和连续接触式两大类。前者的代表是板式塔，后者的代表则为填料塔，在各种塔型中，当前应用最广泛的是筛板塔与浮阀塔。 关键词：丙烯；脱乙烷塔；热量衡算；物料衡算；丙烯精馏塔。 Annual output of 98,000 tons refined isopropyl alcohol propylene Process Design Section --- Deethanizing Tower Abstract Propylene is one of raw materials for Petrochemical industry，it occupies an important place in the processing of crude oil. Rectifying column purified and seprated pyrolysis gas to get propylene that largely uses to product principal raw material of the acrylonitrile, butyl alcohol, octyl alcohol, propylene epoxide and isopropanol.In order to improve production capacity with low investment and power,high benifit,Title I design production capacity is 98,000 tons annual output of isopropyl alcohol, started a period of 8,000 hours / year, material composition of ethane, propylene, propane, butane, propylene is 74.1% in material, boiling point of each component and its relative volatility differences of degree of separation of each component. Due to high propylene purity requirement, this paper design the column plate number is more, the propylene tower is higher. Finally based on the results of optimized distillation, determined the equipment parameters of the tower, tower diameter, float valve tray, high tower, heat load, so as to design the bottom reboiler, the overhead condenser and tower body of the main equipment. Simple process, less investment, the operation is relatively simple, basic can satisfy the industrial production of propylene classy article. The design uses a multi-component distillation, the process by decreasing volatility program, process design the two towers that is, first isolated by de-ethane ethane tower, tower distillation top separated from the ethane , top of the propylene tower geit that propylene, the purity of 93.5%, and propylene as the pr