催化裂化主分馏塔的模拟策略与用能分析优化  

SIMULATION STRATEGIES AND ENERGY-USE ANALYSIS AND OPTIMIZATION FOR A MAIN FRACTIONATING COLUMN OF FCC

作　　者：颜艺专[1] 陈清林[2] 张冰剑[1] 易国刚[1] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室,广州510640 [2]中山大学化学与化学工程学院

出　　处：《石油炼制与化工》2008年第6期35-40,共6页Petroleum Processing and Petrochemicals

基　　金：广东省自然科学基金(04020128);留学回国人员科研启动基金

摘　　要：以某1.0 Mt/a催化裂化装置的分馏单元为研究对象,利用流程模拟软件PRO/Ⅱ进行模拟计算,分析研究催化裂化主分馏塔的模拟策略,在此基础上建立了该分馏塔模型,模拟计算结果满足工程计算精度要求。利用分析法对催化裂化主分馏塔进行用能分析,结果表明,合理提高高温位取热量同时减小低温位取热量,可以有效降低分馏过程损。在保证产品分布和质量的前提下优化调整催化裂化主分馏塔各中段取热比例,过程效率可以提高25.7%。The simulation strategy for the main fractionation column of a 1.0 Mt/a fluid catalytic cracking（FCC） unit by using PRO/II software was discussed in this article. Simulation,energy use analysis and optimization were also done for said FCC fractionating column. The compositions of the feed stream to the column were estimated by an isothermal flash in a backwards manner with known data of the product streams. Grayson Streed method was chosen for the simulative calculation. The main fractionating column was divided into seven sections, and appropriate plate efficiencies were adjusted based on the known data of product streams. According to the simulation strategies,a model of said main fractionating column was built and the simulated results met the precision requirements of engineering calculation An energy use analysis for this column was done through the energy and exergy analysis,and ε- Q drawings were used to reflect the process exergy loss. According to the study,the exergy loss of the column could be improved by enhancing the heat exchange of internal pump around with high temperature streams and reducing such exchange with low temperature streams. Simulation results showed that the exergy efficiency of the process could increase up to 25.7% with the aforementioned techniques without sacrificing requirements on the product distributions and specifications.

关 键 词：催化裂化装置 蒸馏塔 模型 [火用]分析 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]