Ammonium chloride evaporation crystallization equipment

Working Principle 

Ammonium chloride evaporation crystallization equipment heats an ammonium chloride solution, causing the water to evaporate and the solution to reach a supersaturated state, thus promoting the crystallization of ammonium chloride. Common working principles include:

• Evaporation Method: Achieving supersaturation by removing part of the solvent; suitable for ammonium chloride solutions where solubility does not change significantly with temperature.

• Vacuum Cooling Method: The solvent is flash-evaporated under vacuum conditions, while the solution is adiabatically cooled for crystallization; suitable for substances like ammonium chloride where solubility increases at a moderate rate with increasing temperature.

Equipment Types

MVR Evaporation Crystallization System: A compressor pressurizes and heats the secondary steam generated during evaporation, returning it to the system as a heat source for recycling. The thermal energy utilization rate is over 90%. This system significantly saves energy and reduces consumption, resulting in low operating costs and a crystallized product purity of over 99%.

Multi-Effect Evaporation Crystallization System: Utilizing a multi-effect evaporation crystallization process, this system treats the mother liquor produced by MVR, producing solid ammonium chloride and condensate that meet specific requirements.

Flash/Cooling Crystallization System: This system cools and crystallizes MVR and multi-effect evaporation products, focusing on the impact of cooling rate on crystal growth. The resulting crystals meet product standards.

Equipment Features:

Energy Saving and Fast Operation: Compared to traditional multi-effect evaporation systems, MVR technology reduces energy consumption by over 50%, and operating costs by 60.72% of standard coal equivalent.

High Automation: The entire system is PLC controlled and remotely monitored, supporting continuous automated operation with a low failure rate.

High Crystallization Quality: The crystallizer produces large-particle ammonium chloride crystals that are easy to filter, resulting in low moisture content.

Low-Temperature Evaporation: Low-temperature evaporation (40-70℃) reduces the risk of scaling and extends equipment life.

Strong Corrosion Resistance: Parts in contact with materials are made of TA2 titanium or 2205 duplex steel; secondary steam contact parts are made of TA2/2205; and condensate contact parts are made of 316L stainless steel.

Application Scenarios

Ammonium chloride evaporation crystallization equipment is widely used in chemical, pharmaceutical, and environmental protection fields, primarily for treating wastewater containing ammonium chloride, achieving ammonium chloride recovery and water resource reuse. For example, in high-salinity wastewater treatment, evaporation crystallization technology separates ammonium chloride from the wastewater, reducing its salinity and meeting environmental discharge standards.

Selection Recommendations

When selecting ammonium chloride evaporation crystallization equipment, factors such as production scale, material characteristics, energy consumption requirements, and investment budget should be comprehensively considered. For example, for treating high-concentration ammonium chloride wastewater, the MVR evaporation crystallization system is a fast and energy-efficient option.