Membrane separation nitrogen generator is a common industrial nitrogen production device with the advantages of simple structure, low energy consumption, and stable operation, which is widely used in industrial scenarios with medium and low nitrogen purity requirements. Scientific and standardized daily maintenance is the key to extending the service life of membrane components, ensuring stable nitrogen production efficiency, and reducing equipment failure rates. Its daily maintenance work mainly includes regular inspection of air intake system, maintenance of core membrane components, cleaning of filtering devices, and inspection of electrical and control systems, with standardized operation cycles and key technical requirements.

The pretreatment air intake system maintenance is the basic daily work of membrane separation nitrogen generators. The equipment relies on compressed air as the raw material gas, and the cleanliness, dryness, and stability of air intake directly affect the service life of the separation membrane. It is necessary to check the air compressor operating status, air intake pressure, and pipeline tightness every day to avoid pressure fluctuation and air leakage. Regularly drain the water and oil in the air storage tank and filter pipeline, and discharge condensed water every 4 to 8 hours during continuous operation to prevent moisture and oil pollution from entering the membrane module and causing membrane pore blockage and oxidation damage.

Core membrane component maintenance is the core link of equipment maintenance. The polymer separation membrane is a precision vulnerable component, which is sensitive to oil, water, and dust pollution. It is forbidden to operate the equipment without a pretreatment filter device. The primary, medium, and high-efficiency filter elements of the air intake system need to be replaced regularly: the primary filter element is replaced every 3 months, the medium-efficiency filter every 6 months, and the high-efficiency precision filter every 12 months. It is necessary to regularly detect the nitrogen purity and output flow of the equipment. If the purity decreases or the flow is insufficient without pressure failure, it indicates that the membrane module is slightly blocked, and professional cleaning or aging replacement is required in time.

Daily inspection and regular maintenance of electrical and control systems cannot be ignored. Every day, check whether the equipment power supply, control panel, pressure gauge, and flow meter display normally, and eliminate line aging and loose wiring faults. Regularly clean the equipment surface and ventilation heat dissipation holes to avoid dust accumulation affecting heat dissipation and causing component overheating. In addition, long-term shutdown maintenance should be done well: when the equipment is shut down for more than 7 days, the internal pipeline pressure should be released, and the interior should be kept dry and clean to prevent membrane component mildew and pipeline corrosion, ensuring the equipment can be started normally after standby.