MEE (Multi-effect Evaporation) Plant
A Multiple Effect Evaporation (MEE) plant concentrates wastewater by evaporating water in stages, reducing volume and recovering water for reuse.
A Multiple Effect Evaporation (MEE) plant concentrates wastewater by using multiple stages of evaporation to remove water, reducing the overall volume of waste. Each stage uses the steam generated from the previous stage, making the process energy-efficient. This method not only minimizes waste but also recovers water for reuse, making it a sustainable solution for industrial wastewater management.
Process Description:
The process begins with cooling water circulation and vacuum generation to lower the boiling point. Feed enters the calandria via a preheater, which uses sensible heat from condensate water to raise the feed temperature and reduce energy requirements.
Effluent is heated in the calandria, where external steam initiates evaporation. The resulting water-vapor mixture goes to the Vapor-Liquid Separator (VLS), separating vapor from the concentrated liquid. The pure vapor is either condensed or used as a heating medium in subsequent effects, enhancing steam economy.
By adding multiple effects, each using vapor from the previous one, steam consumption and boiler capacity are reduced, lowering operating costs. The final concentrated reject from the last effect is processed in an ATFD, achieving zero liquid discharge.