The oil separator element is a critical component of screw air compressors; it separates oil from air, allowing the oil to recirculate within the compressor while the air is discharged for end-user consumption. As a consumable part subject to wear and tear, it requires timely replacement upon reaching the end of its service life.
Various malfunctions can occur during operation, one of which is the burnout of the oil separator element—a failure where the element actually catches fire. What measures can be taken to prevent this?
1. Pre-start lubrication: For compressors that have been idle for a period or are being started in cold winter temperatures, inject a small amount of lubricating oil into the main unit before startup. This ensures the unit has lubrication and cooling right from the moment it begins to run.
2. Monitoring discharge temperature: During daily operation, keep a close watch on the compressor's discharge temperature. If the machine runs at excessively high temperatures for an extended period, identify and resolve the root cause. Operating within the normal temperature range prevents prolonged high-heat conditions that could lead to oil system failures and subsequent fires.
3. Preventing static-induced ignition: Ensure the compressor is properly grounded and that the oil-air tank maintains electrical continuity with the machine's ground wire. When installing the oil separator, inspect the mating surface of the oil-air tank (where it contacts the gasket) for foreign matter—such as rust, sealant residue, or debris—that could disrupt the grounding connection.
4. Inspecting the electrical control box: Check for fibers, foam, or other flammable materials inside the electrical control box. Preventing these materials from igniting due to electrical arcs generated during component operation helps avoid fires that could destroy the machine.
5. Addressing high-temperature issues in units with thermostatic valves:Follow the principle of resolving the root cause. If the thermostatic valve is faulty, replace it; do not simply bypass or short-circuit the valve.
6. Oil selection: While oil-injected rotary compressors generally do not suffer from carbon buildup due to lower discharge temperatures, the circulating oil must possess good oxidation resistance to ensure an adequate service life. Use specialized oils or circulating oils with excellent demulsibility (resistance to emulsification) for these compressors. Antioxidants should exhibit sufficiently low volatility at typical compressor operating temperatures to ensure the lubricant remains effective until the scheduled oil change.