溶剂脱沥青抽提段的模拟与优化  

Simulation and optimization of the extract segment of solvent deasphalting plant

作　　者：李武东[1] 杜平安[1,2] 曹发海[1,3] 应卫勇[1] 房鼎业[1] 

机构地区：[1]华东理工大学化学工程系,上海200237 [2]中国石油化工集团股份有限公司洛阳分公司,河南洛阳471012 [3]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《计算机与应用化学》2009年第4期455-460,共6页Computers and Applied Chemistry

摘　　要：溶剂脱沥青装置是炼油企业重要的加工单元之一,本文首次以Aspen Plus为工具模拟研究丙烷溶剂脱沥青过程抽提段,选用其中的萃取(EXTRACT)模块,考察不同的热力学方法对萃取的影响,筛选出萃取效果较好的PSRK法。并优化减压渣油虚拟组分的族组成分布,模拟计算结果为:99.97%的石蜡组分(Paraffinics)集中在萃取相中,基组分(Primitive)在轻重两相中的分率各为:46.56%和53.44%,而萃余相中则集中了85.92%的芳香组分(Aromatics)和91.21%的金属等杂质(Impurities)。与现场数据相比,脱沥青油(Deasphalted oil,DAO)流量的相对误差为1.85%,其余误差都不超过1%。Solvent deasphalting （SDA） plant was one of the important plants in oil refining enterprises. This study used Aspen Plus for the first time to simulate the extract segment of a propane SDA plant, chose the EXTRACT module and investigated the effect of several different thermodynamic methods on the extract process. The PSRK method which performed a better result for the extraction was adopted finally. Then, under the given conditions of mass balance of every assay pseudo-component and volume balance of total vacuum residue, the liquid composition of every assay pseudo-component was optimized. Simulation results show that 99.97% of paraffinic components are extracted in the solvent rich phase while 85. 92% of aromatic components and 91.21% of the impurities components remain in the asphaltic residue. Primitive components were distributed almost equally in both phases. Compared with the operating data, the flow rate of DAO （ Deasphalted oil） was a little less than that of it and the relative error was 1.85%, while the other relative errors were all within 1%.

关 键 词：ASPEN PLUS 丙烷溶剂脱沥青 萃取 模拟 热力学方法 

分 类 号：TQ021.8[化学工程] TE624.183[石油与天然气工程—油气加工工程]