Freeze dryers are widely used in the air separation industry for pre-cooling the air at the rear end of air compressors, removing a large amount of moisture from the air and reducing the load on the molecular sieve purifier. It has the characteristics of small volume, low energy consumption and good running stability. The daily maintenance of the drying chiller plays an important role in the performance of the machine and the improvement of production efficiency. The daily maintenance of the dryer requires attention to the following:
1 The use of the freeze dryer must be strictly in accordance with the requirements, especially the inspection and replacement of grease. The grease change cycle of the freeze dryer is affected by the temperature at the compression end. When the temperature of the compression end is high, the replacement period of the lubricating oil is appropriately shortened. In general, the lubricating oil should be inspected once every 10,000 hours of continuous operation. When the compressor is first run. It is recommended to change the oil and clean the oil filter after running for 2000h. Check that the system is clean. If the system is in good operating condition, replace the oil every 20,000h. Avoid prolonged exposure to air when changing the oil, as the freezer has water absorption.
2 After the failure of the freezer, it is necessary to thoroughly check the cause. If necessary, ask a professional company to find out the exclusion.
3 When the motor of the freeze dryer is burnt, impurities such as patent leather will spread throughout the refrigeration system, and the system should be thoroughly cleaned during maintenance. The filtration system of the entire system should be thoroughly inspected and replaced if necessary. Poor handling can pose a threat to the long-term operation of the compressor, and may even result in small losses, resulting in irreversible consequences.
4 After the compressor is overhauled, the system should be dehumidified. It is recommended to dry with a dry nitrogen pass system and then vacuum. The lower the degree of vacuum, the more favorable the later operation of the system and the higher the efficiency. Take serious care when testing leaks, most of the faults in the refrigeration system are rooted in leaks in the system.
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