过程工业水分配网络系统集成的NLP模型

针对单组分杂质用水和废水处理网络同步集成最优化问题,以最小总操作费用为目标,建立了非线性规划(NLP)模型。该模型既考虑了新鲜水费用和水处理费用之间存在的耦合关系以实现二者的优化均衡,又考虑了环境排放标准及分散式处理网络对水网络集成的影响。采用商业优化软件GAMs对算例问题进行求解,结果表明本文提出的模型能有效处理工业水分配网络系统的优化集成问题,与用水网络和废水处理网络分别集成相比,在年总费用上有不同程度的减小,较好地实现了过程工业在满足环保排放规定前提下的经济效益最大化。     

基于决策树的三组元精馏序列结构最优合成规则识别

针对三组元精馏系统结构的优化合成,提出一种数据驱动的基于信息熵最小化的分类回归决策树（CART）模型。三组元精馏优化数据采用文献中严格模拟优化的结果,数据包含4种三组元混合物、34种进料组成以及7个候选精馏序列结构的最优化设计结果,生成数据集用来训练CART决策树。由决策树训练结果给出了三组元精馏结构最优设计决策规则,模型测试结果显示本文提出的决策树模型对数据集范围内三组元物系精馏结构决策的准确率为88.2%,同时表明了影响三组元最优精馏序列的主要影响因素及其重要性。     

混合顺序对热集成水网络的能耗影响

研究了流股混合顺序对热集成用水网络的能耗影响。首先，根据两流股的混合规则，基于热力学分析的方法研究了多流股的水网络中，不同的混合顺序对系统能耗的影响。然后，根据产生的影响结果，归纳出混合顺序的规则，可用于指导选择适当的流股混合顺序，从而提高系统节能效果。     

Synthesis of Water Utilization System Using Concentration Interval Analysis Method （ Ⅰ ） Non-Mass-Transfer-Based Operation

A strategy for water and wastewater minimization is developed for continuous water utilization systems involving fixed flowrate（non-mass-transfer-based）operations,based on the fictitious operations that is introduced to represent the water losing and/or generating operations and a modified concentration interval analysis（MCIA） technique.This strategy is a simple,nongraphical,and noniterative procedure and is suitable for the quick yields of targets and the identification of pinch point location.Moreover,on the basis of the target method,a heuristic-based approach is also presented to generate water utilization networks,which could be demonstrated to be optimum ones. The proposed approaches are illustrated with example problems.     

基于浓度间隔分析的用水系统集成(Ⅰ)非传质操作

A strategy for water and wastewater minimization is developed for continuous water utilization systems involving fixed flowrate(non-mass-transfer-based)operations,based on the fictitious operations that is introduced to represent the water losing and/or generating operations and a modified concentration interval analysis(MCIA) technique.This strategy is a simple,nongraphical,and noniterative procedure and is suitable for the quick yields of targets and the identification of pinch point location.Moreover,on the basis of the target method,a heuristic-based approach is also presented to generate water utilization networks,which could be demonstrated to be optimum ones. The proposed approaches are illustrated with example problems.     

基于模糊规划的质量负荷不确定水网络的综合

针对单组分质量负荷不确定的工业用水网络综合,提出了修正的对称模糊规划（SFLP）模型,同时提出了用水网络设计的多目标混合整数对称模糊规划模型,以及求解这一问题的主目标设定法策略.对多个算例问题进行求解,结果表明,本文提出的模型以及求解策略对负荷不确定的工业用水网络的综合问题有良好的适用性,能有效避免退化解,从而获得优化流程设计.     

内部能量集成精馏塔的模拟研究及其节能特性分析

针对苯-甲苯和丙烯-丙烷物系,模拟分析了压缩比、进料状态及换热量分布方式对理想内部能量集成精馏塔的操作特性、所需塔内换热面积及节能效果的影响。将模拟结果与传统精馏塔及热泵精馏塔进行比较,结果显示内部能量集成精馏塔的节能效果对于不同物系有较大差别。对苯-甲苯物系,热泵精馏塔的节能效果最好,节能百分率为40％。对丙烯-丙烷物系,理想内部能量集成精馏塔的节能优势明显,节能百分率在60％～80％。本文提出了内部能量集成精馏塔热温匹配的换热量分布方式。模拟结果表明,达到同样节能效果,采用热温匹配的换热量分布方式可以在压缩比较小时大幅度减小传热面积。采用热温匹配的换热量分布方式可以在压缩比较小时大幅度减小传热面积。     

能量集成常减压系统的简捷模型及优化

针对常减压装置,提出基于Fenske-Underwood-Gilliland方程和焓衡算的简捷模型对现有的常减压系统复杂塔进行操作型计算和优化,并利用夹点分析确定系统的热回收目标。以常减压系统的年净利润最大为目标,同时考虑系统的产品收益和能量集成,建立了基于PSO随机粒子群算法的优化方法。以现有的常减压装置为算例,得到了年净利润最大条件下的各工艺参数。通过与严格模拟对比,表明常减压系统简捷模型能够得到较准确的计算结果。     

三组分精馏隔板塔的操作柔性模拟与分析

隔板精馏塔作为完全热耦合精馏塔由于具有较强的耦合性,其操作与控制相比传统精馏塔更为复杂,同时由于具有更多的自由度表现出更多的操作柔性。选用正戊烷、正己烷、正庚烷混合物的分离为例,采用严格模拟方法,通过对7 种进料条件设计的隔板塔进行模拟,考察了不同进料条件下的操作柔性,同时考察进料组成对隔板精馏塔操作柔性的影响。     

浓度极稀物中回收微量重组分的精馏操作策略—准间歇精馏

A new operation policy--quasi-batch distillation for recovering infinitesimal amounts species existing in a mixture is presented. In quasi-batch distillation operation, feed is introduced with a constant flow rate onto the feed stage of the column, and the flow rate of the distillate is the same as that of the feed, whereas the bottom product is withdrawn periodically. The behavior of quasi-batch distillation is simulated and analyzed through an example on heavy water separation. Comparing with continuous or batch distillation, the new operation policy is more reliable and efficient to achieve higher recovery of dilute component. This is especially suitable for separating small amount of precious species from large amount of raw material.