【作者】 赵秀娟；

【导师】 陈兴国；

【作者基本信息】 兰州大学 ， 应用化学， 2007， 硕士

【摘要】 中国石油兰州石化公司新建的丁二烯装置于2006年10月开工后，出现了第一萃取精馏塔和第二萃取精馏塔等塔压差偏高、负荷不能达到规定设计值、产品质量不稳定、能耗高于设计值等问题，致使受前系统影响脱轻、脱重塔塔负荷一直未能达到设计值、整个装置操作状态不佳。针对这些问题，本论文对可能存在的原因进行了查找，初步确定原设计中塔的开孔面积、降液管底隙偏小等是产生这些问题的主要因素。在此基础上经水力学重新核算，确定了新的开孔面积、降液管底隙等参数，制定了具体的改造方案并加以实施。生产结果表明，改造后的塔系压差明显降低、因塔系统压差引起的塔釜温度偏高的现象得到了有效控制、第二萃取精馏塔丁二烯质量得到了明显的改善。随着塔釜温度的降低，塔底再沸器蒸汽耗量显著降低，整个装簧能耗明显下降。本论文还对丁二烯装置的优化做了进一步的探讨。更多还原

【Abstract】 After the new butadiene unit of Lanzhou Petrochemical Company was put into production in Oct. 2006, the difference pressure of the first and second extraction columns was high and the capacity of the unit could not reach the design value. The quality of the production was not steady and the actual value of the energy consumption of the unit was higher than that of the design. Affected by the foregoing towers, the load of the revamping de-light and revamping de-heavy towers was not fulfilled the design value and the whole unit did not work well. Perhaps small area of the open hole of the towers and lower value of fluid descending pipe gap were main reason. In order to solve these problems, some modifications have been adapted based on hydraulic recalculation. By increasing the open hole area of the towers and fluid descending pipe gap value, the difference pressure of the towers was greatly decreased and the qualities of the productions were significantly improved. Meanwhile, the temperature of the towers bottom was dropped observably. The energy was saved since the steam consumption was declined. To compare difference pressure of the towers, yield, as well as the quality of the productions, the modification of extractive distillation for butadiene unit was proved to be successful. Moreover, optimization for butadiene unit was also discussed in this thesis.更多还原