Pressure swing adsorption vacuum desorption oxygen generator (VPSA oxygen generator for short) uses VPSA special molecular sieve to selectively adsorb impurities such as nitrogen, carbon dioxide and water in the air under the condition of penetrating atmospheric pressure, and desorbs the molecular sieve under vacuum conditions to produce high-purity oxygen (90~93%) in a cycle.
How Does a VPSA Oxygen Plant Work?
The pressure swing adsorption oxygen generator is mainly composed of a blower, a vacuum pump, a switching valve, an adsorption tower and an oxygen balance tank. After the raw air is filtered to remove dust particles from the inlet, it is pressurized to 0.3-0.5 BARG by the Roots blower and enters one of the adsorption tower. The adsorption tower is filled with adsorbent, in which water, carbon dioxide, and a small amount of other gas components are adsorbed by the activated alumina loaded at the bottom at the inlet of the adsorption tower, and then nitrogen is adsorbed by the zeolite molecular sieve loaded on the top of the activated alumina. Oxygen (including argon) is a non-adsorbed component and is discharged from the top outlet of the adsorption tower as product gas to the oxygen balance tank. When the adsorption tower adsorbs to a certain degree, the adsorbent in it will reach a saturated state. At this time, it is vacuumed by a vacuum pump through a switching valve (opposite to the adsorption direction), and the vacuum degree is 0.65-0.75 BARG. The adsorbed water, carbon dioxide, nitrogen and a small amount of other gas components are extracted and discharged to the atmosphere, and the adsorbent is regenerated.
What is the Utilities of TCWY Vacuum Pressure Swing Adsorption Oxygen Generation Plant?
For the production of 1,000 Nm³/h O2 (purity 90%), the following Utilities are required:Installed power of main engine: 500kwCirculating cooling water: 20m3/hCirculating sealing water: 2.4m3/hInstrument air: 0.6MPa, 50Nm3/h
* The VPSA oxygen production process implements “customized” design according to the user’s different altitude, meteorological conditions, device size, oxygen purity (70%~93%).
Post time: Sep-13-2024
