化工学报 ›› 2022, Vol. 73 ›› Issue (2): 792-800.DOI: 10.11949/0438-1157.20211281
收稿日期:
2021-09-03
修回日期:
2021-10-30
出版日期:
2022-02-05
发布日期:
2022-02-18
通讯作者:
陈珺
作者简介:
魏朋(1995—),男,硕士研究生,基金资助:
Peng WEI(),Jun CHEN(),Zhiguo WANG,Fei LIU
Received:
2021-09-03
Revised:
2021-10-30
Online:
2022-02-05
Published:
2022-02-18
Contact:
Jun CHEN
摘要:
在模拟移动床的实际工作过程中,由于进料浓度和温度变化以及色谱柱填充不一致等因素影响,初始工艺参数作业下的分离性能可能会出现下降。首先对模拟移动床的机理模型进行了分析;然后在色谱分离平衡理论的基础上,使用有限元正交配置法求解模型得到新的工艺参数点;最后以果葡糖浆组分分离为对象,使用所提方法求解有扰动作用时的优化工艺参数,结果显示果糖纯度的合格率从81%提高到99%,证明其具有良好的鲁棒性。
中图分类号:
魏朋, 陈珺, 王志国, 刘飞. 基于平衡理论的模拟移动床工艺参数鲁棒寻优[J]. 化工学报, 2022, 73(2): 792-800.
Peng WEI, Jun CHEN, Zhiguo WANG, Fei LIU. Robust optimization of process parameters of simulated moving bed based on equilibrium theory[J]. CIESC Journal, 2022, 73(2): 792-800.
模型参数 | 工艺参数 | ||
---|---|---|---|
柱分布结构 | 2-2-2-2 | A的进料浓度 | 0.5 g/ml |
组分数 | 2 | B的进料浓度 | 0.5 g/ml |
柱长 | 53.6 cm | 进料液流量 | 0.0200 ml/s |
柱直径 | 2.6 cm | 洗脱液流量 | 0.0414 ml/s |
空隙率 | 0.38 | 提取液流量 | 0.0348 ml/s |
轴向扩散系数 | 0.0381 cm2/s | 提余液流量 | 0.0266 ml/s |
A的Henry系数 | 0.54 | 循环液流量 | 0.0981 ml/s |
B的Henry系数 | 0.28 | 切换时间 | 1552 s |
表1 模拟移动床模型参数及工艺参数
Table 1 Model parameters and process parameters of simulated moving bed
模型参数 | 工艺参数 | ||
---|---|---|---|
柱分布结构 | 2-2-2-2 | A的进料浓度 | 0.5 g/ml |
组分数 | 2 | B的进料浓度 | 0.5 g/ml |
柱长 | 53.6 cm | 进料液流量 | 0.0200 ml/s |
柱直径 | 2.6 cm | 洗脱液流量 | 0.0414 ml/s |
空隙率 | 0.38 | 提取液流量 | 0.0348 ml/s |
轴向扩散系数 | 0.0381 cm2/s | 提余液流量 | 0.0266 ml/s |
A的Henry系数 | 0.54 | 循环液流量 | 0.0981 ml/s |
B的Henry系数 | 0.28 | 切换时间 | 1552 s |
图7 随机扰动作用下生成的300组正态分布值(L,ε)运行在初始工艺参数下得到的产品纯度和回收率(图(a)和(b)中的蓝点代表各自的性能达标,红点代表未达标;图(c)中的红点代表模型参数的原始值,蓝点代表正态分布值)
Fig.7 The product purity and recovery rate obtained by running 300 sets of normal distribution values ??(L,ε) generated under the random disturbance action under the initial process parameters
图8 初始工艺参数下样本点(L,ε)对应的流量比在m2-m3平面上的分布(红点代表落在了完全分离区域的外面,蓝点代表落在了完全分离区域的里面)
Fig.8 Distribution of the flow ratio corresponding to the sample point (L,ε) on the m2-m3 plane at the initial process parameters
图9 鲁棒工艺参数下样本点(L,ε)对应的流量比在m2-m3平面上的分布(红点代表落在了完全分离区域的外面,蓝点代表落在了完全分离区域的里面)
Fig.9 Distribution of the flow ratio corresponding to the sample point (L,ε) on the m2-m3 plane at the robust process parameters
图10 随机扰动作用下生成的300组正态分布值(L,ε)运行在鲁棒工艺参数下得到的产品纯度和回收率(图(a)和(b)中的蓝点代表各自的性能达标,红点代表未达标;图(c)中的红点代表模型参数的原始值,蓝点代表正态分布值)
Fig.10 The product purity and recovery rate obtained by running 300 sets of normal distribution values (L,ε) generated under the random disturbance action under the robust process parameters
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