应用田口方法设计苯酐精制的最佳控制参数

摘要

In order to find the best control indicators of benzoic acid,maleic anhydride,phthalide, anthraquinone and heavier components,the Taguchi quality design method was used to achieve control of impurities in refining phthalic anhydride. First,the controllable factors level table was set up by analysis of variance to determine the best test conditions. Second,the signal-to-noise ratio was used as an indicator of robustness to analyze simulation parameters robustness with the smaller-the-better design method. Finally,the results were verified by test. The feasibility of this design method was confirmed in this engineering field. The parameter control by the Taguchi design method was used in production practice,and the best process control indicators of the rectification tower top was recommended to achieve higher ratio of premium quality phthalic anhydride,providing guidance for optimizing phthalic anhydride production.%采用田口品质设计方法来达到苯酐在精制过程中杂质参数的控制，找出顺酐、苯甲酸、苯酞、蒽醌及重组分的最佳控制指标，得到苯酐精制产品。首先设置可控因子水平表，由方差分析确定最佳试验条件；其次以信噪比作为稳健性指标，采用望小设计方案，就模拟参数的稳健性进行了望小分析；最后以试验对分析结果进行了验证，确认此设计方法在本工程领域中创新应用的可行性。将此设计方法得到的参数控制结果应用于化工生产实践，给出了精馏塔塔顶的最佳工艺控制指标，使苯酐的优等品率显著提高，对优化苯酐生产工艺具有直接指导意义。