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基于自适应模拟退火遗传算法的多杂质用水网络设计 总被引:3,自引:1,他引:3
水资源的短缺和环境污染的日益严重,对过程工业提出了减少新鲜水用量和废水排放量的要求,且通常废水中都含有多种污染物,由此本文提出了考虑回用的多杂质用水网络设计。不但建立了多杂质用水网络超结构MINLP模型,而且针对MINLP问题求解困难的现状,开发了自适应模拟退火遗传算法。实例研究结果表明该算法可以找到全局最优解且计算时间可满足要求。另外,该算法可有效避免陷入局部最优,也不要求提供初始可行解。 相似文献
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本文根据实验及生产经验数据,确定一压力式喷嘴的主要结构尺寸与操作条件之间的关系。运用全塔的热量及物料衡算确定塔内气相负荷,并通过模拟液滴在空气中飞行的轨迹来估算塔径与塔高。在计算中采用解析或数值方法取代了列线图的图解积分方法,使之更接近所提出的物理模型。通过几个实例的计算,结果与实际符合较好,可提供设计计算参考。 相似文献
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Environment impact (EI) is a multi- decision-making, multi-objective and multi-criteria system with uncertainties and ambiguities, and environment impact index (EII) of a chemical compound is difficult to calculate appropriately with traditional methods. In this paper, fuzzy optimal selection theory based on the concept of relative importance degree is adopted to determine relativity of the degree of environment impact of chemical compounds as EII, and environment impact assessment (EIA) of a chemical process is done with values of compounds EII to select alternatives that cause less pollution to the environment. It is useful in further process optimization. The paper presents a practical application to the treatment of process condensate in a synthesis ammonia plant to illustrate the procedure, and the calculation result demonstrates the feasibility, practicability, and effectiveness of the suggested method. 相似文献
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水网络优化设计柔性综合 总被引:1,自引:0,他引:1
水网络优化设计方法有夹点法和数学规划法,但都没有考虑不确定参数的影响,不确定参数的存在,可能使水网络超出其操作范围,影响到整个系统的运行。本文提出不确定性条件下水网络优化设计方法,即水网络优化设计柔性综合,应用多目标优化方法中的分层法,首先满足柔性要求,然后优化水网络,使设计水网络满足柔性要求且用水量最少。用示例检验设计出的水网络可以满足柔性要求且新鲜水用量最少。并用一示例加以说明。 相似文献
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This paper mainly discusses the design of distributed effluent treatment systems with single contaminant.A new method is put forward and four basic rules are provided.The key point of the method is that global optimality is obtained by guaranteeing the optimality of each step taken in the design.Costs per unit mass of removed contaminant are used as a scale to choose the next combination of an effluent stream and a treatment process.The remaining problem is updated after each choice.As for multiple contaminants,a two-stage method is adopted.At the first stage,the sub-networks for each contamiant are designed by the method mentioned above;at the second stage,the sub-networks are merged together in a new way.Overall,the paper presents a simple but practical framework for the effluent treatment system design. 相似文献