摘要
针对以环氧乙烷和正丁醇为原料合成乙二醇单丁醚(EGBME)反应精馏塔控制要求,提出了一种基于相对增益矩阵(RGA)分析的控制方案设计。首先,通过动态模拟取得被控变量和操纵变量的相对增益矩阵,依此设计出一种通过塔底产品流量控制塔釜液位、再沸器负荷控制提馏段灵敏板温度、环氧乙烷进料控制反应段灵敏板温度的控制方案。随后利用Aspen Dynamic模拟,在添加环氧乙烷进料发生20%的阶跃扰动情况下,考察了反应精馏塔的动态响应情况及控制效果。结果表明,提出的控制方案能够使系统在2h内恢复稳定,且产品质量与设计值之间的偏差不大于1%。设计效果能很好达到控制要求。
An approach to choosing control structures was developed by introducing the relative gain array （RGA） control the reactive distillation column for synthesis of ethylene glycol monobutyl ether （EGMBE） from ethylene oxide （EO） and N-butanol .The relationship between manipulated variables and controlled variables was first studied by RGA analysis based on dynamic simulation. Then on the basis of the previous results we used the product flow rate controlled the bottom liquid level, the reboiler heat duty controlled the temperature on tray 11, the EO flow rate controlled the temperature on tray 6. The responds to feed disturbance of different control structures was simulated by using Aspen Dynamic and the results showed the RD column will regain stability in 2 hours and the product quality varies less than 1%.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2012年第9期1123-1126,共4页
Computers and Applied Chemistry
基金
国家自然科学基金资助项目(20976172)
关键词
反应精馏
乙二醇单丁醚
控制设计
相对增益矩阵
reactive distillation, ethylene glycol monobutyl ether, control design, relative gain array
