US 12,508,534 B2Granted

Method for mobile pressure swing adsorption oxygen production device

AssigneeChengdu Yingchen Technology Co., Ltd

InventorYuwen Song

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Abstract

The present disclosure provides a method for a mobile pressure swing adsorption oxygen production device, comprising a first PSA section, a second PSA section and a third PSA section which are operated in series; the first PSA section adsorbs oxygen in raw air by a velocity-selective adsorbent; the second PSA section adsorbs nitrogen etc. in desorption gas of the first PSA section by a nitrogen balance-selective adsorbent; the third PSA section removes nitrogen from oxygen-rich gas flowing out of the second PSA section; the first PSA section sequentially undergoes at least adsorption A and vacuumizing VC in one cycle; the second PSA section sequentially undergoes at least adsorption A, pressure-equalizing drop ED, backward discharge BD and pressure-equalizing rise ER; and the third PSA section sequentially undergoes at least adsorption A, pressure-equalizing drop ED, backward discharge BD and pressure-equalizing rise ER.

Claims20

Dependent claims

A method for a mobile pressure swing adsorption oxygen production device, comprising a first pressure swing adsorption (PSA) section, a second PSA section and a third PSA section which are operated in series further comprising the following steps:

a) passing dry raw air through a velocity-selective adsorbent bed in the first PSA section wherein most of oxygen is adsorbed by the velocity-selective adsorbent bed;
most of nitrogen and argon are discharged from an outlet of an adsorption tower;
b) desorbing an oxygen-enriched mixed gas from the first PSA section and sending into an adsorption tower of the second PSA section, which passes through a nitrogen balance-selective adsorbent bed;
wherein most of nitrogen is adsorbed by the nitrogen balance-selective adsorbent bed;
c) flowing oxygen, argon and a small amount of nitrogen from an outlet of the adsorption tower of the second PSA section, and directing into a nitrogen balance-selective adsorbent bed of an adsorption tower of the third PSA section wherein most of nitrogen is adsorbed and oxygen, argon and a small amount of nitrogen flow out from an outlet of the adsorption tower;
and further wherein
d) the adsorption tower of the first PSA section sequentially undergoes at least PSA steps of adsorption (A) and vacuumizing (VC) in one cycle;
the adsorption tower of the second PSA section sequentially undergoes at least PSA steps of adsorption (A), pressure-equalizing drop (ED), backward discharge (BD) and pressure-equalizing rise (ER) in one cycle;
and the adsorption tower of the third PSA section sequentially undergoes at least PSA steps of adsorption (A), pressure-equalizing drop (ED), backward discharge (BD) and pressure-equalizing rise (ER) in one cycle.

6 more elements

Dependencies are inferred from the claim text.