In the nitrogen generation system, the buffer tanks are air buffer tank and nitrogen buffer tank, both of them are very important.
1. Functions of Air Buffer Tank
Maintain the stability of supplied air pressure. The adsorption tower of the nitrogen generator is switched once every minute, and the pressure rise time of each switching is 1 ~ 2 seconds, which means that the instantaneous gas consumption is quite large. If there is no air buffer tank, the compressed air will directly enters the nitrogen generator, and the air purification system at the front stage can not process a large amount of compressed air instantly, then the water and oil in compressed air will directly enters the adsorption tower, it will poison the molecular sieve, shorten the service life of the molecular sieve, reduce the gas production rate and increase the cost.
2. Functions of Nitrogen Buffer Tank
The nitrogen generator produces a mixture of nitrogen with different purity, the purity of produced nitrogen at the beginning and end of the nitrogen production process is not as high as that at the intermediate stage. In order to prevent the fluctuation of nitrogen purity, we need the nitrogen buffer tank to make the nitrogen purity reach a stable state before output. According to the characteristics of PSA process, it requires quick pressure balancing, rapid evacuation and stable airflow. At the beginning of the nitrogen production process, the nitrogen buffer tank will supplement nitrogen to the adsorption tower, it can reduce the consumption of compressed air and quickly obtain nitrogen to meet the purity requirements. If the nitrogen storage tank is used instead, the pressure of the nitrogen storage tank will fluctuate, and also affect the purity of the nitrogen generator and the gas consumption of the later stage.
Post time: Jan-28-2022