乙腈法C_4抽提丁二烯中流体力学状况的分析  

Analysis of the Hydrodynamics Status by Acid Nitrile Method in the C_4 Extraction Butadiene Plant

作　　者：姜森[1] 冯志豪[1] 乐清华[2] 

机构地区：[1]中国石化北京燕化石油化工股份有限公司合成橡胶事业部,北京102500 [2]华东理工大学化工学院,上海200237

出　　处：《石化技术》2003年第2期25-30,共6页Petrochemical Industry Technology

摘　　要：根据乙腈法C_4抽提丁二烯装置2次扩产改造前后的实际生产状况,通过分析和比较萃取精馏塔的性能负荷图,考察了塔内的流体力学状况。结果表明:第一次改造,由于塔板开孔率和板间距偏低,设计负荷点接近溢满液泛线,即使在低负荷下运行,操作点也在液泛线附近,精馏塔弹性很小,极易受到溶液发泡、流量波动的影响而液泛;第二次改造,在塔板开孔率和板间距上的调整,显著地提高了第一萃取精馏塔和第二萃取精馏塔的操作弹性和生产能力。但是各塔的能力仍不均衡,第二萃取精馏塔的提馏段可能是整个装置生产的“瓶颈”。The hydrodynamics status was investigated by analyzing and comparing the performance load chart of extraction rectification towers according to the two expansions of C4 extraction butadiene plant. The result shows that on the first expansion, the design load and operation points still approach the fluid overflow line even if running on the low load (75 percent of design value) because of the low holed rate of tray and space between the tray floors. The tower is easy overflowed when meeting with fluid sparkle or flux fluctuating due to the small operation flexibility of the rectification tower. On the second expansion, the operation flexibility and production capacity of the two extraction rectification towers are improved greatly by adjusting the holed rate and the space between the trays. The capacity of the towers are not equilibrium. The second extraction rectification tower is the product 'bottle neck' to the whole plant.

关 键 词：乙腈法 C4 抽提 丁二烯 流体力学 塔板性能 降液管 

分 类 号：TQ028[化学工程]