1, compressed air purification system

Carbon molecular sieves are the key materials that determine the production capacity of nitrogen generators. Since compressed air provided by air compressors usually contains oil and water, oil and water will reduce the adsorption capacity of carbon molecular sieves, so compressed air must be removed before entering the oxygen-nitrogen separation system. Oil removes water.

First, the air is compressed by the compressor to 0.75-1.0 MPa into the air purification system. Most of the water, oil and mechanical impurities are removed by the pipeline filter. Then the water is defrosted by the refrigeration dryer to make the pressure dew point reach 2°C-10°C. Again through the fine filter, ultra-fine filter, activated carbon degreasing device, get a pressure of 0.75-1.0MPa, pressure dew point of 2 °C -10 °C, oil content ≤ 0.01PPm of clean compressed air.

The compressed air purification system consists of a pipeline filter, a freeze dryer, a fine filter, a superfine filter, an activated carbon degreasing device, an automatic drain valve, and a ball valve.

2. Air storage tank system

The function of the air tank system ensures that the oxygen-nitrogen separation system uses gas smoothly, prevents the instantaneous airflow velocity from being too fast during the switching of the oxygen-nitrogen separation system, affects the air purification effect, improves the quality of compressed air entering the adsorber, and is beneficial to prolonging the life of the molecular sieve.

The air tank system consists of air tanks, safety valves, globe valves, ball valves, and pressure gauges.

3, oxygen and nitrogen separation system

Oxygen and nitrogen separation system is the core part of air separation. Its main body is two adsorption towers filled with carbon molecular sieve. When clean compressed air enters an adsorption tower, O2, CO2 and trace H2O are adsorbed by carbon molecular sieve, and nitrogen is output from the outlet. . When one tower is in the process of adsorbing nitrogen, the other tower is depressurized and the O2, CO2 and H2O that are adsorbed in the molecular sieve are discharged from the pores to achieve regeneration and desorption of the molecular sieve. The two towers alternately adsorb and regenerate and continuously output nitrogen.

Oxygen and nitrogen separation system consists of an adsorption tower, carbon molecular sieve loaded inside the tower, pneumatic valve, muffler, throttle valve, pressure cylinder, pressure gauge and other components.

4, nitrogen buffer system

The main function of the nitrogen buffer system is to equalize the pressure and purity of nitrogen separated from the nitrogen oxide separation system and to ensure continuous supply of nitrogen. At the same time, when the adsorption tower is undergoing regeneration to adsorption switching, it will store part of the qualified nitrogen gas back into the protection tower of the adsorption tower, and it will also help the adsorption tower to increase its pressure.

Nitrogen buffer system consists of buffer tanks, flow meters, dust filters, pressure regulators, throttle valves, and safety valves.

5, electrical control system

The main function of the electrical control system is the start-stop operation of the equipment, the display of the working status indicator, the audible and visual alarm indication of failure, the purity display and the actuation of the pneumatic valve according to the setting procedure.

The electrical control system consists of a programmable controller CPU, gas source triple pieces, solenoid valves, indicator lights, and a micro oxygen meter, and is mainly installed in the electric control cabinet.