The VPSA oxygen system is mainly composed of a blower, a vacuum pump, a switching valve, an adsorber, and an oxygen buffer tank. After the raw material air is removed by the suction filter, it is pressurized by the Roots blower to 0.45 barg and enters one of the adsorbers. The adsorber is filled with an adsorbent, in which moisture, carbon dioxide, and a small amount of other gas components are adsorbed on the adsorbent inlet at the bottom of the activated alumina, and then nitrogen is adsorbed on the zeolite molecular sieve on top of the activated alumina. Oxygen (including argon) is a non-adsorbed component that is discharged as a product gas from the top outlet of the adsorber to the oxygen buffer tank.
When the adsorber is adsorbed to a certain degree, the adsorbent therein will reach a saturated state. At this time, through the switching valve, a pressure equalization and depressurization process is first performed to recover part of the oxygen in the dead space of the adsorption tower and simultaneously reduce the pressure of the adsorption tower. To a slight negative pressure, vacuum pump (with the opposite direction of adsorption) with a vacuum pump, the vacuum is -0.50 barg. The adsorbed moisture, carbon dioxide, nitrogen, and a small amount of other gas components are extracted and discharged to the atmosphere, and the adsorbent is regenerated.
Each adsorber of VPSA alternately performs the following steps: --- adsorption --- desorption --- stamping
We have successfully implemented the first industrialized pressure swing adsorption oxygen generator in China.
We are the first to provide a reliable oxygen generator for domestic pulp oxygen bleaching.
We have created a precedent for the operation of domestic pressure swing adsorption oxygen at low temperatures.
We solved the effect of temperature difference on the process.
We have developed the most advanced skid-mounted VPSA small oxygen production process.