First, the nitrogen generator parameters
1. Pressure of use: The traditional nitrogen generator outlet pressure is usually 0.1-0.6mpa, but some processes require high nitrogen pressure. At this time, a turbine nitrogen generator works and the pressure required to pressurize the required nitrogen.
2. Dew Point: Most users have little need for dew when using nitrogen. When selecting a dryer, the user requiring the dew point selects the adsorption dryer because the dew point of the adsorption dryer is lower than the dew point of the cold dryer.
3. Flow: Flow is the core parameter of the nitrogen generator. Many customers don't know how much nitrogen they need to flow. Users using bottled nitrogen and liquid nitrogen can actually calculate the approximate flow rate of the desired nitrogen generator.
4. Purity: Purity is also a very important parameter of the nitrogen generator. Different industries have different nitrogen purity, and users can refer to the purity of their own industry.
Second, the principle of nitrogen generator
The nitrogen generator uses a gas separation technique to separate nitrogen from nitrogen and oxygen in the air. After purification, the qualified compressed air enters the adsorption tower from the bottom of the column and flows through the entire column from top to bottom. Since the adsorption tower is filled with a carbon molecular sieve, cms (carbon molecular sieve) is a special kind of activated carbon. Its pore size is distributed in the range of nitrogen and oxygen. When the gas passes, the surface adsorbs more oxygen molecules than the nitrogen molecules due to different molecular diameters. Most of the nitrogen molecules are in a free state and flow out from the upper end of the adsorption tower. After a period of time, the cms are saturated with the adsorbed oxygen molecules and need to be regenerated, and the regeneration is by depressurization. Because cms does not adsorb gas molecules at lower pressures, most of the molecules are hollowed out for decompression time. This process is called desorption. In order to achieve continuous gas supply, one tower is in the working adsorption state, and the other tower is in the regeneration state, ready for the next adsorption.
