Industrial Evaporation & Crystallization Solutions

Sodium Sulfate Evaporation and Crystallization System

We provide Na₂SO₄ evaporation and crystallization solutions for producing sodium sulfate crystals

Sodium Sulfate Evaporation and Crystallization System

Industrial Evaporation & Crystallization Solutions

Sodium Sulfate Evaporation and Crystallization System

We provide Na₂SO₄ evaporation and crystallization solutions for producing sodium sulfate crystals
Physical Properties and Applications of Sodium Sulfate

During the production of lithium salts such as lithium carbonate, lithium hydroxide monohydrate, and lithium chloride, sodium sulfate is commonly produced as a byproduct. Its concentration and composition vary depending on the specific process. For example, in lithium carbonate production, sodium sulfate coexists in solution with lithium carbonate or lithium sulfate. In lithium hydroxide monohydrate processes, the solution contains small amounts of lithium hydroxide and tends to be alkaline. In lithium chloride production using sodium chloride, traces of LiCl may remain in the sodium sulfate solution.

Because of these variations, the evaporation and crystallization system must be tailored to each application. Sodium sulfate has a low boiling point elevation, and its solubility remains nearly constant above 30°C. System design often considers factors such as energy costs and initial investment. Depending on the situation, either MVR or multi-effect evaporation and crystallization technologies can be used effectively.

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Process Workflow
Solubility of Sodium Sulfate at Different Temperatures
Temperature (°C) 0 10 20 25 30 40 50 60 70 80 90 100
Solubility (g/100g water) 4.9 9.1 19.5 27.9 40.8 48.4 46.7 45.3 44.1 43.7 42.9 42.3
Recommended Equipment
    1. DTB Crystallizer
    2. DTB Crystallizer
      Upward velocity in the draft tube: ≤ 1 m/s
      Settling velocity in the crystallization zone: ≤ 0.1 m/s
      The DTB crystallizer is a high-efficiency crystallization system designed for evaporative crystallization from supersaturated solutions. It is suitable for processes with vacuum cooling and moderate evaporation rates and is widely used in chemical processing, metal smelting, acid recovery from steel pickling, and desulfurization wastewater treatment in power plants. View Details
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From dryers and evaporators to crystallizers and turnkey systems, our team is ready to help you move forward with the right solution.

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Process Equipment
Evaporators Equipment

We provide advanced evaporation and crystallization systems designed for efficient separation, purification, and recovery of valuable compounds in lithium battery material processing and recycling. Evaporation crystallization is a widely used chemical separation technique that relies on the difference in solubility of substances at varying temperatures.

Our Evaporators Equipment
    1. Rising Film Evaporator
    2. Rising Film Evaporator The rising film evaporator is designed for high-throughput evaporation and efficient heat transfer by utilizing the rapid upward flow of liquid and vapor within vertical heating tubes.
    1. Falling Film Evaporator
    2. Falling Film Evaporator The falling film evaporator is a high-efficiency, non-circulating evaporator designed for the gentle and continuous evaporation of liquids.
    1. Forced Circulation Evaporator
    2. Forced Circulation Evaporator The forced circulation evaporator is designed to enhance the flow velocity of liquid solutions by using an external circulation pump, ensuring efficient heat transfer and minimizing fouling or scaling.
    1. Natural Circulation Evaporator
    2. Natural Circulation Evaporator The natural circulation evaporator relies on density differences in the liquid to drive circulation, without the use of external pumps.
    1. Wiped Film Evaporator
    2. Wiped Film Evaporator This design enables rapid evaporation or distillation, even for heat-sensitive, viscous, or fouling-prone materials.