Scheme design: 11.6t/h triple-effect evaporative crystallization system
1. Product scheme: three-effect evaporator + salt crystallization
2. Water quality: COD 60000~80000mg/L sodium chloride salt content 28%
3. Treatment process: The PH of wastewater is adjusted to neutral with hydrochloric acid, the concentration of Ca2+ and Mg2+ is <50mg/L, the concentration of F- is <10mg/L, the concentration of SS is <50mg/L, the concentration of COD is 60,000-80000mg /L, and the industrial grade sodium chloride and epoxy mother liquor are evaporated, and the epoxy mother liquor is returned to production and reuse.
4. Process difficulties: high salt and high COD, C0D in concentrated crystal slurry reaches more than 1 million, and the particle size of crystalline salt should be controlled at 60-80 mesh
5. Evaporator capacity: 15t/h
6. Evaporation capacity of evaporator: 11.6t/h
7. Evaporator material: 2205 duplex stainless steel