Analysis of Low-Temperature Evaporation Treatment Process for High-Salinity Wastewater: Applicable Scenarios, Process, and Core Advantages.
1. Types of High-Salinity Wastewater and Industries Suitable for Low-Temperature Evaporation Treatment
Low-temperature evaporation technology offers significant advantages in certain high-salinity wastewater treatment fields due to its efficiency and energy-saving features. Below are typical applicable scenarios and industry cases:RO Reverse Osmosis Brine、MVR/Multiple Effect Evaporation Brine、Heavy Metal Wastewater、Desulfurization Wastewater、Dyeing Auxiliary Wastewater,etc.
Note: Low-temperature evaporation technology is especially suitable for medium- and small-scale projects with a daily treatment capacity ≤ 30 tons. The system is modular, allowing for flexible adaptation to different industry needs.
2、Analysis of Low-Temperature Evaporation and Scraper Crystallization Combined Process
High-salinity wastewater Treatment Process Flow
- Low-Concentration Wastewater (TDS ≤ 15%) Treatment Path:
- High-Concentration Wastewater (TDS > 15%) Direct Treatment Path:
The core equipment of the low-temperature evaporation treatment process for high-salinity wastewater includes the vacuum evaporator and the scraper vacuum crystallizer. GRELLIX is the original manufacturer of the low-temperature vacuum evaporator and scraper vacuum crystallizer.
3、 Treatment Efficiency Empirical Data
Through 200+ engineering cases, the system’s performance has been verified to be stable and reliable:
Case Study: A certain electronics manufacturer’s RO brine treatment project (20t/day) reduced hazardous waste by 3,200 tons annually through the combined process. The recycled water is directly used in the cooling system, saving over 800,000 RMB in water costs per year.
4、Comparative Analysis of Low-Temperature Evaporation, MVR Evaporation, and Multi-Effect Distillation (MED) Processes
Process Selection Guidelines：
1、Prioritize Low-Temperature Evaporation:
- Small-scale projects, heat-sensitive wastewater, low-to-medium salinity (1–20% TDS).
- Example: Pharmaceutical mother liquor treatment (15 t/d, 12% TDS).
2、Prioritize MVR Evaporation:
- Medium/high salinity (10–30% TDS), continuous production, high automation requirements.
- Example: Chemical plant high-salinity wastewater (50 t/d, 25% TDS).
3、Prioritize MED:
- Large-scale projects (≥100 t/d), high salinity (>20% TDS), abundant steam supply.
- Example: Seawater desalination brine treatment (200 t/d, 6% TDS).
Conclusion:
The low-temperature vacuum evaporation and vacuum scraper crystallization combined process provides an economically efficient solution for high-salinity wastewater treatment through precise operational adaptation and intelligent control. It is particularly suitable for medium- and small-scale projects to achieve multiple goals, including pollution reduction, carbon emission reduction, resource recovery, and zero liquid discharge(ZLD. When selecting equipment, it is recommended to conduct pilot testing, optimize operational parameters based on salt composition, and ensure the system’s long-term stable operation.
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