The nitrogen machine must be used by many people, but the specific process of the operation of the nitrogen machine must be unknown to many people, and the operating process of the nitrogen machine we are going to talk about is especially the process of safety. When the compressed air source pressure reaches 0.7MPa, open the total inlet stop valve of the nitrogen maker, and the regulating valve is the working pressure source of the 0.4 valve; Maintenance before work starts, turn off the nitrogen maker, nitrogen outlet valve and sampling valve, turn off the machine power switch nitrogen. Observe the normal operation of the pressure and pneumatic valves of the two adsorption tanks. Systems and pipes must be completely relieved of pressure; For oxygen concentration exhaust system, pay attention to fire safety, indoor air circulation is good; Adjust the sampling valve of the oxygen analyzer to adjust the pressure of the sample 1.0bar, the flow meter will reach about 1, pay attention to the sampling volume should not be too large. Start testing nitrogen purity. Air compressor running timing discharge valve. Turn on the power counterclockwise of the nitrogen machine to the PLC master station switch of the electric cabinet. In the control cabinet of the production machine, the upper limit of nitrogen and oxygen content of the oxygen analyzer is set, and the device works normally. According to whether the pressure of the two adsorption towers is normal to switch the two absorption towers, the pressure of the regenerative tower is zero, even when the pressure of the two towers should be close to half of the pressure of the original tower. Must be close to the whole system and the parts of the system; When the pressure of the nitrogen adsorption tank reaches 0.6MPa, observe that the nitrogen system works normally, turn on the power switch to measure the oxygen meter, and adjust the sampling flow rate and oxygen content. Adjust the valve opening according to the purity of nitrogen, the purity of the automatic switch to the storage tank nitrogen, nitrogen storage tank storage nitrogen pressure is generally 0.6 ~ 0.8MPa. Before the start of work maintenance, pay attention to the oxygen content of the oxygen meter indication is in line with the requirements. The purity and flow of nitrogen can be adjusted by opening the nitrogen outlet valve. Slowly open the exhaust valve and adjust the flow rate to 1/2 of the rated flow rate. When the purity of nitrogen reaches the requirements, slowly open the pure gas outlet valve, flow the required flow, close the exhaust valve, and the normal operation of the equipment can be put into use. The first air compressor knob no load, no load running 2 minutes after the air compressor. Air buffer tank bottom discharge valve opens to empty the tank. Opening the air compressor can determine the two adsorption tanks according to the change in pressure, the pressure of the compressed air buffer tank exceeds 0.8MPa, and the nitrogen switch of the control cabinet is opened.

Pressure swing adsorption nitrogen machine maintenance and routine maintenance

(1) Filter element once a year, clean once a month, clean on the net and blow the air filter.

(2) No washing of the body.

(3) Try to stay away from the water source to prevent the body from getting damp and rusting.

(4) Keep the appearance clean and dust free.

(5) Often check the leakage phenomenon of the fast interface part (with soap and water can be)

(6) Often check whether the valve is working normally.

(7) In order to avoid wet molecular sieve and affect the service life, it should be the next day drainage filter.

(8) Dry machine cleaning once a month.

(9) Avoid paint loss or shell deformation resulting in damage to the computer controller hard object collision.