초록

Enriched oxygen from a pressure swing adsorption system and air are blended to provide oxygen enriched air of desired purity, particularly for use at flow rates between those for which liquid oxygen and on-site cryogenic air separation plants are desirable.

대표청구항 ▼

A system for the production of oxygen enriched air comprising: (a) a pressure swing adsorption system containing one or more adsorbent beds capable of selectively adsorbing either oxygen or nitrogen as the more readily adsorbable component of feed air passed to said system, with conduit means for re

A system for the production of oxygen enriched air comprising: (a) a pressure swing adsorption system containing one or more adsorbent beds capable of selectively adsorbing either oxygen or nitrogen as the more readily adsorbable component of feed air passed to said system, with conduit means for recovering either the less readily adsorbable component or the more readily adsorbable component of the feed air as an oxygen enriched stream for subsequent blending with air at a desired pressure; (b) air compression means for pressurizing blend air at said desired pressure for blending with said oxygen enriched stream, said air compression means including control means for controlling the flow rate of said blend air; (c) a mixing zone for mixing said enriched oxygen stream and said blend air; (d) discharge conduit means for passing oxygen enriched air product to a downstream application therefor; (e) computer/controller means adapted to receive input signals corresponding to the flow rates of enriched oxygen and said blend air and to the oxygen purity of said enriched oxygen stream and said oxygen enriched air product and adapted to transmit output signals for the control of the flow rate of said oxygen enriched stream and said blend air so that the oxygen enriched air product is at the desired oxygen purity level; (f) purity monitoring means for monitoring the purity of said oxygen enriched stream and of the oxygen enriched air product, and for transmitting input signals to said computer/controller means in response to said measured purities; and (g) flow monitoring means for monitoring the flow rate of said oxygen enriched stream and of said blend air passing into said mixing zone, and for transmitting input signals to said computer/controller means in response to said measured flow rates, whereby enriched oxygen from the pressure swing adsorption system and blend air can be properly blended to produce product oxygen enriched air having a desired oxygen concentration.