考虑NOx排放的制氢操作参数多目标优化  

Multi-objective optimization of hydrogen production operation parameters considering NOx emission

作　　者：高宠明 叶昊天 邹雄[1] 韩志忠[1] 董宏光[1] GAO Chongming;YE Haotian;ZOU Xiong;HAN Zhizhong;DONG Hongguang(School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China)

机构地区：[1]大连理工大学化工学院,辽宁大连116024

出　　处：《大连理工大学学报》2020年第3期237-243,共7页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(21276039)。

摘　　要：综合考虑环保要求与经济性指标的化工装置工艺参数优化具有重要意义,天然气蒸汽转化制氢作为最重要的氢气生产装置正在成为制氢领域未来的发展方向.采用过程模拟的方法对天然气蒸汽转化制氢装置进行建模,并计算分析装置水碳比与反应温度对装置氢气产量、制氢成本及NOx排放量的影响,利用MATLAB回归多元函数模型,采用归一化法构建经济性与NOx排放量之间的目标函数.计算结果表明,多目标优化很大程度上取决于经济性权重的选取,当经济性权重α=0.5时,最优操作条件为反应温度857.7℃,水碳比2.76,此时NOx排放量减少了24.76%,经济费用仅增加0.64%.It is of great significance to comprehensively consider the environmental protection requirements and economic indicators of chemical plant process parameter optimization.Hydrogen production by steam reforming unit as the most important unit is becoming the future development direction of the hydrogen production field.The process simulation method is used to model the hydrogen production by steam reforming unit.Also the effects of the steam to carbon ratio and the reaction temperature on the hydrogen production,the cost of hydrogen production unit,and the NOx emission are calculated and analyzed.The multivariate function model of MATLAB regression is used.The normalization method is applied to construct the objective function between economy and NOx emission.The calculation result shows that the multi-objective optimization depends to a large extent on the selection of economic weightα.Whenα=0.5,the optimal operating conditions are as follows:reaction temperature is 857.7℃,the steam to carbon ratio is 2.76,then the NOx emission is decreased by 24.76%,with the economic cost increased by only 0.64%.

关 键 词：制氢 NOX排放 模拟 多目标优化 PARETO前沿 

分 类 号：TE624[石油与天然气工程—油气加工工程]