The following is the technical analysis and application guide for the second-hand enamel double cone vacuum dryer:
1、 Core equipment advantages
1. Significant cost-effectiveness
The cost of purchasing second-hand equipment is only 30% -50% of that of a new machine, and maintaining mature equipment stability is comparable to that of a new machine. The enamel inner liner (Ra ≤ 0.4 μ m) has both acid and alkali corrosion resistance and material adhesion resistance, extending its service life by more than 30%.
2. Low temperature and efficient drying
The vacuum environment (0.08-0.1MPa) reduces the boiling point of the material to 40-60 ℃, and the retention rate of thermosensitive components is greater than 95%. The double cone structure rotates at low speed (4-8rpm) to drive the material to form a 'diamond trajectory' motion, which increases the drying efficiency by two times compared to traditional equipment.
2、 Key technical principles
• Thermal conduction mechanism: The jacket is indirectly heated by steam/thermal oil, combined with a vacuum pump for continuous dehumidification, which increases the evaporation rate of water by 5-10 times.
Dynamic mixing design: When the cone rotates, the material continues to flip, and the heating uniformity reaches 98%, avoiding crystal structure damage caused by local overheating.
Sealed pollution prevention: The silicone sealing ring and vacuum butterfly valve provide dual protection, ensuring a solvent recovery rate of over 90% and isolating external pollutants.
3、 Industry application achievements
In the pharmaceutical field, the drying of traditional Chinese medicine extracts avoids the oxidation and decomposition of active ingredients, and the retention rate of active substances is ≥ 97%.
Fine chemical industry: When processing metal catalysts, the leaching rate of metal ions is less than 0.01ppm to ensure product purity.
Food additives: The loss rate of thermosensitive materials such as vitamin C after drying should be controlled within 3%.
4、 Key points of operating standards
1. Loading control
The actual loading volume should be ≤ 50% of the total volume (such as the limit of 1000L for 2000L models), and excessive loading will result in a 40% decrease in drying efficiency.
2. Maintenance key
Check the lubrication status of the turbine reducer every month, and ensure that the bearing temperature is ≤ 65 ℃.
Immediately rinse the inner liner with pure water after shutdown to prevent acid residue erosion of the enamel layer.
3. Security Warning
When the vacuum degree drops abnormally (>0.01MPa/10min), priority should be given to checking the integrity of the flange sealing ring and filter cloth.