Ammonium sulfate and ammonium chloride single-effect evaporators

1. Working Principle of Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporator

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

Salt Crystallization: The concentrated solution is further crystallized to recover ammonium sulfate and ammonium chloride salts.

2. Materials Used in Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporator

Corrosion-Resistant Materials: Due to the highly corrosive nature of ammonium sulfate and ammonium chloride in the wastewater, titanium or 316L stainless steel is recommended.

Anti-Scale Design: A forced circulation evaporator is used to prevent salt crystallization from clogging the pipes.

3. Features of Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporator

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

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

Anti-Scale Measures: A salt leg structure is incorporated to reduce crystallization clogging.

4. Application Areas

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

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

5. Energy Consumption of Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporators

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.

6. Selection Recommendations for Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporators

Selection Based on Water Quality: Consider the corrosiveness, salinity, and treatment volume of the wastewater to select appropriate materials and structures.

System Optimization: For wastewater with a high boiling point, it is recommended to use a dual-compressor MVR evaporator or a combination thereof.

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