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Suzhou Hengda purification equipment Co., Ltd.
PSA pressure swing adsorption nitrogen making principle
The carbon molecular sieve can absorb oxygen and nitrogen in the air at the same time, and the adsorption capacity increases with the increase of pressure, and there is no significant difference in the equilibrium adsorption of oxygen and nitrogen at the same pressure. Therefore, it is difficult to achieve the effective separation of oxygen and nitrogen by the change of pressure. If the adsorption rate is taken into account, the adsorption characteristics of oxygen and nitrogen can be separated effectively. The diameter ratio of nitrogen oxygen molecules is small, so that the diffusion speed hundreds of times faster than nitrogen, so the carbon molecular sieve adsorption oxygen adsorption rate is also very fast, about 1 minutes to reach more than *0%; and only 5% of the nitrogen adsorption capacity, so the general adsorption are oxygen, and the rest of the body. Is nitrogen. So, if the adsorption time control in less than 1 minutes, it can be preliminarily separated oxygen and nitrogen, that is to say, the adsorption and desorption by differential pressure to achieve, adsorption pressure increased, desorption pressure drop. The distinction between oxygen and nitrogen is to rely on the difference between the speed of adsorption, by controlling the adsorption time to achieve, the time is very short, the oxygen has been fully adsorbed, and nitrogen has not yet been able to absorb, it stopped the adsorption process. Therefore, the pressure swing adsorption nitrogen pressure changes, but also to control the time within 1 minutes.
1, process characteristics:
(1) PSA nitrogen making equipment has the characteristics of wide application range, high purity, simple process, high degree of automation, low operation cost and so on.
(2) the compressed air purification module has long service life, easy replacement and easy maintenance.
(3) the outlet flow rate of nitrogen making equipment is large, and the outlet pressure can be adjusted within the set range.
(4) opening and stopping at any time according to production.
(5) the purity of nitrogen can be reached by the pressure swing adsorption method, and no nitrogen purification equipment is needed for >*9.*9%.
(6) adding nitrogen purification device: hydrogenation purification, carbon purification, gas purity of more than *9.***5% qualified products