High TDS Wastewaters Desalination for Demine Water Production in Chemical Process Industry

The reject of reverse osmosis or evaporator system with blow down of cooling tower and boiler are one ofthe main sources of high solid wastewater in oil and gas refineries as well as petrochemical complex. Formodifying the existing systems for the determination of the best optimal option among all alternativesconsidered, expensive laboratory or pilot plant methods are no longer used as the only solution. Thus, theimplementation of such plans with mathematical modeling and optimization is possible. In this study, themixed integer linear programming was used alongside operational experience; the superstructure plan wasfirst created for a network of cooling towers and reverse osmosis. In the next step, the most optimummodel was introduced for the reduction of raw water consumption and produce demine (DM) water wasrequired by the factory. Optimum Scenario results include the production of ۲۰۰m۳/h DM water. TheseEconomic criteria are used in this project to determine the functions of NPV, IRR and Payback.

Keywords:

Desalination , Reuse , Economy , High TDS , Case Study