Many people have used nitrogen generators, but no one knows how to extend its service life. The following is a simple operation process.

1. Turn off the nitrogen generator, nitrogen inlet valve and sampling valve, and turn off the power switch of the nitrogen generator at the same time. Wait until the system and pipelines are completely depressurized (the exhaust gas discharged from the system is concentrated oxygen, pay attention to fire safety, and the indoor air circulation is dredged). Adjust the oxygen analyzer for sampling and adjust the pressure of the pressure reducing valve to 1.0 bar, adjust the sampling flow meter, and adjust the gas volume to about 1. Note that the sample gas volume should not be too large. Start testing the nitrogen purity.

2. When the compressed air source pressure reaches 0.7MPa or more, open the shut-off valve at the total inlet of the nitrogen generator, and then adjust the pressure reducing valve to reduce the pressure to about 0.4-0.5Mpa. At the same time, pay attention to observe the pressure of the two adsorption tanks and Whether the work of the pneumatic valve can be carried out normally.

3. Then turn on the power switch of the nitrogen generator on the electric control cabinet of the PLC master station clockwise. Observe the pressure changes of the two adsorption towers to determine whether the two adsorption towers can be switched normally. The pressure of the regeneration tower is zero, and when it is uniform, the pressure of the two towers should be close to half of the pressure of the original working tower.

4. Turn on the power switch of the oxygen meter, and adjust the appropriate sampling flow rate to observe the oxygen content. Adjust the opening of the purity valve according to the required nitrogen purity. After the purity is qualified, it will automatically switch to the nitrogen storage tank. The nitrogen storage pressure of the nitrogen storage tank is generally about 0.6 0.8 MPa.

5. Close the entire system and all parts of the system. When the pressure of the adsorption tank of the nitrogen generator reaches about 0.6 MPa, observe whether the nitrogen generation system is working normally.

6. Slowly open the vent inlet stop valve, and adjust the flow to 1/2 of the rated flow (hospital central oxygen supply system). Adjust the opening of the nitrogen inlet valve to adjust the purity and flow of nitrogen.

7. Observe whether the oxygen content indicated by the oxygen meter meets the requirements. When the purity of the nitrogen reaches the requirement, slowly open the pure gas outlet shut-off valve, adjust the flow to the required flow, close the vent inlet shut-off valve, and the equipment can be put into use after normal operation.