DMT生产工艺回流比与HMT含量关联分析数据

在DMT（再生对苯二甲酸二甲酯）生产过程中，HMT杂质含量会对DMT产品的品质会产生重大影响，通过采取控制不同回流比大小对工艺进行测试，经计算建立回流比与HMT含量关系的模型，进而可以在设定回流比情况下通过模型预测判断HMT含量，提升工艺开发效率。一、数据采集：根据日常实际试验积累获得不同的塔顶回流流量、塔顶产品流量、HMT含量；二、数据分析：基于上述采集的数据，以塔顶回流流量、塔顶产品流量数据之间的比值计算回流比作为因变量（X），HMT含量为自变量（Y）,通过fit（）函数对X、Y的值进行模型训练，最后拟合形成回流比与HMT含量关系的多项式方程模型：Y=aX4+bX3+cX2+dX+e。三、数据应用：利用上述模型，可以通过代入回流比数值（X）计算得到Y值，即HMT含量预测值，提升工艺开发效率，满足不同客户对DMT产品HMT含量的要求。During the production of recycled dimethyl terephthalate (DMT), the content of HMT impurities exerts a significant impact on the quality of DMT products. Process tests were conducted by controlling different reflux ratios, and a model correlating reflux ratio and HMT content was established through calculations. Subsequently, the HMT content can be predicted via the model under given reflux ratio conditions, thereby improving process development efficiency. 1. Data Collection: Data including various overhead reflux flow rates, overhead product flow rates, and HMT contents were acquired from accumulated daily practical experiments. 2. Data Analysis: Based on the collected data, the reflux ratio was calculated as the ratio of overhead reflux flow rate to overhead product flow rate, which served as the dependent variable (X), while HMT content was taken as the independent variable (Y). The fit() function was used to train the model with the X and Y datasets, and a polynomial equation model describing the relationship between reflux ratio and HMT content was finally fitted: Y = aX⁴ + bX³ + cX² + dX + e. 3. Data Application: Using the aforementioned model, the Y value, namely the predicted HMT content, can be obtained by substituting the reflux ratio value (X) into the equation. This approach enhances the efficiency of process development and meets the HMT content requirements of DMT products from different customers.