I. Main Types of Crystallizers

Evaporation Crystallizer: Increases solution concentration through solvent evaporation by heating until crystallization occurs.

2. Cooling Crystallizer: Achieves supersaturation of the solution by cooling

Condition, crystallize.

3. Reaction Crystallizer: Directly produces crystalline products during the chemical reaction process.

4. Vacuum crystallizer: Lowers boiling point under vacuum to achieve rapid crystallization.

Section II: Basic Structure of Second-Hand Crystallizers

·Vessel: Made of corrosion-resistant material (such as stainless steel) for containing solutions.

·Mixing System: Ensures uniform solution blending, preventing crystal precipitation. ·Heating/Cooling Unit: Controls temperature to regulate crystallization rate.

· Filtration or separation equipment: Separates crystals from mother liquor.

· Control System: Automated or semi-automated operation; some second-hand equipment may be outdated manual models.