Stainless steel crystallization tanks are widely used in industries such as pharmaceuticals, food, and chemicals. The following key points should be noted when using them:
1. Material selection and corrosion resistance
High salt or acidic environments (such as seafood processing and chemical raw material processing) should prioritize the use of 316L stainless steel (containing molybdenum) or duplex stainless steel to avoid pitting and perforation caused by chloride ion corrosion.
The inner wall needs to be electrolytic mirror polished (Ra ≤ 0.4 μ m) to ensure no hygiene dead corners and comply with GMP requirements.
2. Temperature control and heat transfer efficiency
Accurate temperature control is required when introducing refrigerant or steam into the interlayer to avoid uneven crystal structure or scaling caused by excessive local temperature differences.
The use of hollow spiral belt stirring structure can increase the heat transfer area and improve the crystallization efficiency.
3. Cleaning and Sterilization
The equipment needs to be equipped with a cleaning ball and a quick opening interface for thorough cleaning; Regular high-temperature steam sterilization (121 ℃) to eliminate microbial contamination.
The sealing system needs to use sanitary grade mechanical seals to prevent material leakage or external contamination.
4. Operating standards
Before starting, check the vacuum system, mixing device, and pressure gauge to ensure that there are no abnormalities.
When operating in batches, it is necessary to control the cooling rate to avoid over saturation and excessive nucleation.
5. Maintenance and safety
Regularly inspect the mixing blades, seals, and interlayer welds to prevent wear or corrosion.
Pressure vessels must comply with safety standards and monitor the liquid level and pressure during operation.
6. Special environment adaptation
In high humidity environments (such as dairy processing), it is necessary to strengthen the outer wall insulation to prevent the accumulation of condensed water.
The outlet design of the crystallization tank should avoid residual crystal slurry and ensure thorough unloading.
By selecting materials reasonably, standardizing operations, and regular maintenance, it can help extend equipment life and ensure crystal quality.