Ammonium sulfate evaporation crystallization equipment

Equipment Composition

• Heating Chamber: The core component of the evaporator, responsible for heating the ammonium sulfate solution.

• Separation Chamber: Used to separate ammonium sulfate vapor and water.

• Circulation Pump: Circulates the mother liquor back to the heating chamber, maintaining continuous operation of the evaporator.

• Compressor: In the MVR evaporation crystallization system, compresses the secondary vapor generated during evaporation, increasing its temperature and pressure, and then uses it as a heat source for the heating chamber, achieving the recycling of thermal energy.

Working Principle

• The ammonium sulfate solution is introduced into the heating chamber, where heating evaporates the water in the solution.

• The generated vapor then enters the separation chamber to separate from the water.

• During the separation process, the ammonium sulfate vapor further condenses and crystallizes, forming ammonium sulfate crystals.

• Simultaneously, the circulation pump circulates the unevaporated mother liquor back to the heating chamber for reheating and evaporation.

Equipment Types

• Forced Circulation Evaporator: Suitable for low-concentration ammonium sulfate solutions. A forced circulation pump circulates the solution within the heating tubes, improving heat transfer efficiency.

• Falling Film Evaporator: Also usable at low concentrations. The solution falls as a film along the inner wall of the heating tubes, resulting in uniform heating and high evaporation efficiency.

• Multi-Effect Evaporator: Employs a multi-effect co-current evaporation process, using multiple evaporators connected in series. The secondary steam from the previous effect is used as the heat source for the next effect, improving energy efficiency.

• MVR Evaporator: Utilizes mechanical vapor recompression (MVR) technology to compress the secondary steam generated during evaporation, increasing its temperature and pressure, and then using it as a heat source, resulting in significant energy savings.

Equipment Features:

• Significant Energy Saving: Fully utilizes the sensible and latent heat of steam, achieving rapid energy utilization through multi-stage evaporation and condensation.

• High Adaptability: Applicable to ammonium sulfate solutions of varying concentrations. By adjusting the number of evaporators and operating conditions, flexible processing of solutions of different concentrations is possible.

• Reasonable Material Selection: Due to the strong corrosiveness of ammonium sulfate mother liquor, the evaporator crystallizer is designed with this in mind, typically using corrosion-resistant materials such as stainless steel, duplex stainless steel, or titanium.

• Anti-Scale Design: Employs special structures such as reverse circulation evaporation, forced circulation devices, or membrane evaporators to separate the crystal growth zone from the crystal settling zone, reducing the risk of scale formation.

Application Scenarios

• Fertilizer Industry: Used to treat wastewater and mother liquor containing ammonium sulfate, recovering valuable ammonium sulfate resources.

• Chemical Industry: Used to produce high-quality ammonium sulfate crystals.

• Metallurgical Industry: Used to treat wastewater or waste residue containing ammonium sulfate.