Optimization Of Water-Using Network In Batch Process With Single Contaminant

Scarcity of water is a life-and-death problem that human being is facing. Economically using water and improving the utilization efficiency of water resource is an important way of solving the problem. The aggregation of all the water-using processes in an enterprise or community forms a water-using network, which is also a mass exchange network. For these networks, it is very worthy of investigation on how to arrange the water-using processes properly, namely how to optimize the design of water-using processes to reduce fresh water consumption. In recent years, many scholars devoted themselves to the research of water-using network design, and presented many valuable ideas and methods, such as water pinch analysis and superstructure methods. However, most of these methods are only applicable to continuous processes. Due to the complexity of batch processes, there are few works on it. Basing on the existing achievements (such as water pinch analysis and superstructure methods), approaching from the characteristics of variable water-using networks and taking the mathematical programming as a tool, the author makes a systematic and deep research on the determination of the minimum fresh water consumption of the reusing process of batch chemical process with single contaminant, and developed a set of sound methods. The main contents are extracted and listed as below:1. This paper approaches a linear programming (LP) method for determining minimum fresh water demand in batch processes. The time limitation to reuse is eliminated by connecting a tank to each operation unit in batch processes. Building up the superstructure and mathematical model, simplify the superstructure by some rules, then solve it by GAMS (general algebra model system), the minimum fresh water...