Sodium chloride and sodium sulfate single-effect evaporators

1. Features of Sodium Chloride and Sodium Sulfate Single-Effect Evaporators

High-Efficiency Evaporation: High heat transfer efficiency, short heating time, and operation under vacuum and low temperature conditions improve evaporation efficiency.

Corrosion-Resistant Materials: Constructed with titanium or 316L stainless steel to resist corrosion from sodium chloride and sodium sulfate.

Anti-Scale Design: Forced circulation evaporator prevents salt crystallization from clogging pipes.

Automatic Control: Equipped with a DCS or PLC control system for remote monitoring and automated operation.

Salt Separation: The concentrated solution is further crystallized to recover sodium chloride and sodium sulfate salts.

2. Working Principle of Sodium Chloride and Sodium Sulfate Single-Effect Evaporators

Evaporation and Concentration: Water in wastewater is evaporated by heating, and the secondary steam is directly condensed and not reused.

Salt Crystallization: Crystals precipitate from the concentrated solution in the crystallizer, and salts are separated by a centrifuge or filter press.

3. Application Areas of Sodium Chloride and Sodium Sulfate Single-Effect Evaporators

Chemical Industry: Treatment of wastewater containing sodium chloride and sodium sulfate, such as in the fertilizer, pharmaceutical, and dye industries.

Wastewater Treatment: Suitable for treating high-salinity, high-concentration organic wastewater.

4. Energy Consumption and Selection Recommendations for Single-Effect Evaporators for Sodium Chloride and Sodium Sulfate

Single-Effect Evaporation: High energy consumption, requiring 1.1–1.2 tons of steam per ton of water evaporated.

Energy Saving Recommendations: For long-term operation, consider upgrading to a multi-effect or MVR evaporator to reduce energy consumption.

In summary, single-effect evaporators for treating wastewater containing sodium chloride and sodium sulfate have advantages in treating high-salinity, highly corrosive wastewater, but selection and optimization should be based on specific water quality and requirements.