Optimal Design of Water Utilization Network in Batch Processes Targeting Minimum Fresh Water
Because of the attention of researchers, study on water utilization network in batch processes has been developed within recent ten years. This paper presents a new method to calculate the influence of time constraint for targeting minimum fresh water flowrate of a batch process, which is based on the mathematical programming method.In batch processes, the water utilization operation exists in a certain time interval, not in the whole process. Thus water reuse is constrained by time. Center reusable water storages can deposit the reusable water and provide it to other operations which mathematical model for water utilization network in batch process which fixed the number of storages and allowed the water sources to mix. Cheng Huanong and Mao Wenfeng (2007) proposed a linear programming method. They assumed that each operation is connected with a tank, and proved the fresh water would be a fixed value with the increase of periods. Abeer M. Shoaib, C.Y. Foo, etc (2008) addressed MINLP model of synthesizing cost-effective batch water networks where a number of process sources along with fresh water are mixed, stored and assigned to process sink.They assumed the sink requirements are taken over a certain period without details on the time-dependent requirement over the period. But the volume and concentration of reusable water in the storages will change with time. And it can affect the water reuse condition and fresh water flowrate. So in this paper a superstructure of water utilization network and a non-line programming mathematical model are constructed which allow the water sources mix in the storages. The model is to determine the minimum fresh water as the main aim, the number of storages,, volume and concentration of water in storages as optimal parameters. The model is solved by GAMS (General Algebra Model System) and gained the minimum fresh water and the optimal water utilization network. An example is used to illustrate the method and the result shows that the approach is effective for the synthesis of water utilization network in batch processes.
batch process water utilization network time reusable water storage
Wang Chuanqiang Du Jian Chen Li
Institute of Process Systems Engineering, Dalian University of Technology, 116012, Dalian, China School of Environmental &Chemical Engineering, Dalian University, 116622, Dalian, China
国际会议
The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)
大连
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）