Application Case of Vacuum Crystallizer in Evaporation Crystallization Treatment of High-Salt Wastewater
The client is a research institution. The objective of this project is to recover solid crystalline salt from high-salinity brine generated in the production process via evaporation crystallization. A vacuum crystallization system is required to dehydrate the brine, ultimately producing solid crystalline salt with a moisture content ≤10%. The high-salinity brine has a flow rate of 5 tons per day.
Process Flow of Evaporation Crystallization Treatment for High-Salinity Brine:
Low-Temperature Scraper Vacuum Crystallizer, the core equipment of the drying and crystallization system, operates on the principle of maintaining a low-pressure environment in the evaporation chamber via vacuum pumps. A steam heat source (generated by a steam generator if no plant steam is available; otherwise, existing plant steam is utilized) induces boiling of the feed liquid at ≤60°C. The cooling tower system supplies cooling water to the condenser, where vapor is condensed into clear distillate, which is automatically discharged. Inside the evaporation chamber, a continuously rotating scraper agitates the inner wall to prevent salt crystallization on the chamber walls while enhancing evaporation efficiency. This process ultimately converts the saline slurry into dried solids with moisture content ≤10%, which are automatically discharged through the outlet.
Grellix, with 20 years of experience in wastewater treatment engineering and over 1,000 validated projects, provides comprehensive turnkey solutions for:
- High-salinity wastewater treatment
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