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海水淡化系统的集成与优化是提高能源利用效率,降低淡化成本的有效途径。本文提出了多级闪蒸(MSF)与反渗透(RO)的2种集成工艺,以年度总费用最小为目标函数,采用改进的遗传算法进行求解,探讨了不同进料浓度、不同淡水水质要求对2种工艺结构的影响,给出了不同条件下的最优流程结构:当海水浓度大于40000mg·L~(-1)时,宜采用RO-MSF结构。低于40000mg·L~(-1)时,采用MSF-RO结构:当出水水质要求高时采用RO-MSF集成结构优于MSF-RO集成结构;而当出口淡水水质要求低时,宜采用RO-MSF集成系统。
The integration and optimization of the desalination system is an effective way to improve the energy utilization efficiency and reduce the desalination cost. In this paper, two integrated technologies of MSF and RO are proposed. The objective function is to minimize the total annual cost, and the improved genetic algorithm is used to solve the problem. The effects of different feed concentrations, different freshwater quality requirements The optimal flow structure under different conditions is given for the influence of the two process structures. When the seawater concentration is more than 40000 mg · L -1, the structure of RO-MSF should be adopted. The MSF-RO structure is adopted when the concentration is lower than 40,000 mg · L -1: the integrated structure of RO-MSF is superior to the MSF-RO integrated structure when the effluent quality is high; and when the fresh water quality of the outlet is low, RO -MSF integrated system.