Water condensate collection system by using MINLP model

Abstract This paper presents a retrofitted procedure for wastewater, or more specifically, water condensate's separate collection, using an intermediate mathematically-programmed heating design based on a MINLP (mixed-integer nonlinear programming) model. The existing separate condensate collection using an intermediate heating system may no longer be optimal; the basic intention being that minimal changes in the system can efficiently improve the separate collections of low and high-temperature condensates, and the use of available heat. This water condensate collection process was tested on an existing methanol process, by using a MINLP model, which allowed for more effective and additional 5 % water condensate collection system for steam generation.