Caustic Recovery System

RAFAE Engineering Caustic Recovery System reconcentrates the weak lye generated from the mercerizing machine in multistage evaporation plant. In this way caustic soda as well as hot distilled water is recycled instead of treating as highly alkaline waste water. The waste water volume is reduced thus reducing the effluent treatment plant size. The treatment cost is drastically reduced. RAFAE Engineering designs multistage evaporation plant as per customer's requirement of hot water. 

At the start of the plant the weak lye is fed in the plant up the desired level and switched the plant on auto mode. The required final concentration is set at the operating panel touch screen. Vacuum is applied at the condenser for non condensable. Concentration increases in the successive stages and level is maintained automatically due to pressure and temperature gradient available between first and fourth stage due to boiling point difference. Boiling point of high concentration caustic soda is decreased due to vacuum.