Efficient Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporators Enable Effective Wastewater Treatment and Salt Recovery

Ammonium sulfate and ammonium chloride, two widely used compounds in the chemical industry, present significant challenges when it comes to wastewater treatment, particularly due to their high salinity and corrosive nature. In response to these challenges, the Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporators have been developed to provide a high-efficiency solution for treating wastewater while recovering valuable salts.

These evaporators operate on a simple yet effective principle. Water is evaporated from wastewater using heat, and the secondary steam is condensed and discarded, ensuring minimal reuse. The remaining concentrated solution undergoes crystallization to separate and recover ammonium sulfate and ammonium chloride salts. This crystallization process is essential for resource recovery and minimizing environmental impact, as the salts can be reused in various industrial applications.

Due to the corrosive nature of ammonium sulfate and ammonium chloride, the evaporators are constructed using corrosion-resistant materials such as titanium or 316L stainless steel. This ensures long-term durability and stable performance even under harsh conditions. Furthermore, a forced circulation evaporator is incorporated into the design to prevent salt crystallization and clogging within the pipes, significantly improving operational efficiency and reducing maintenance requirements.

One of the standout features of these single-effect evaporators is their high heat transfer efficiency. With the ability to operate under vacuum and low-temperature conditions, these systems offer rapid heating times, thereby improving the overall evaporation process. They are also equipped with an automated control system, either DCS or PLC, enabling remote monitoring and ensuring ease of operation. The built-in anti-scale design, including a salt leg structure, further reduces crystallization and clogging, making them ideal for continuous, long-term use.

The Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporators are particularly well-suited for use in industries such as fertilizers, pharmaceuticals, and dyes, where wastewater containing high concentrations of ammonium salts is common. These evaporators provide an effective solution for wastewater treatment, enabling high-salinity wastewater to be treated and reducing the environmental impact of industrial processes.

While single-effect evaporation systems are effective, they do require substantial energy input, consuming 1.1–1.2 tons of steam per ton of water evaporated. For industries aiming to optimize energy efficiency in the long term, upgrading to multi-effect or mechanical vapor recompression (MVR) evaporators is recommended. These advanced systems can significantly reduce energy consumption while maintaining treatment efficiency.

When selecting an evaporator for ammonium sulfate and ammonium chloride wastewater treatment, it is essential to consider the specific water quality, including corrosiveness, salinity, and treatment volume. For wastewater with higher boiling points, a dual-compressor MVR evaporator or a combination system may be more suitable for achieving the desired efficiency.

In summary, the Ammonium Sulfate and Ammonium Chloride Single-Effect Evaporators offer a highly efficient, corrosion-resistant, and energy-efficient solution for treating high-salinity wastewater while recovering valuable salts. Careful selection and optimization based on specific water characteristics will ensure the best results, making this technology a key solution for industries looking to reduce environmental impact and improve operational efficiency.