基于联立模块法的造纸机干燥部操作参数优化

Simultaneous Module-Based Optimization of Operation Parameters of Dryer Section in Paper Machine

分析了造纸机干燥部能量系统的特点,建立了一种造纸机干燥部能量系统的非线性规划模型,提出了造纸机干燥部能量系统的优化方法.该方法把干燥部分成几个不同的功能模块,通过物料和能量平衡分别建立各模块的过程模型,以造纸机实际的操作参数范围作为约束条件,以单位产品能耗最低为目标,借助Matlab软件的相关算法求解能耗最低的过程操作参数.所建立的模型适应性良好,求解方便,可以针对纸机运行参数进行过程用能的优化.将该模型用于优化某新闻纸机干燥部的过程参数,结果表明,新闻纸机可以在不同的季节根据操作环境进行参数优化,比现有运行状态节能6%左右.

In this paper,by analyzing the characteristics of the energy system of the dryer section in paper machines,a nonlinear programming（NLP） model of the system energy is established,and the corresponding optimization method is proposed.In the method,the dryer section is divided into several functional modules,and the process model of each module is set up based on material and energy balance.By using the operation parameter ranges as the constraints and by taking the minimum energy consumption per unit product as the objective,the ope-ration parameters corresponding to the minimum energy consumption are determined with the help of the algorithm presented in Matlab.It is found that the proposed NLP model is well adaptive and convenient for the energy optimization at different operation parameters,concretely,for newsprint machines,the energy consumption in the dryer section reduces by about 6%.