B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/23
B01D 53/04 (2006.01) B01D 53/26 (2006.01) G05B 19/07 (2006.01)
Patent
CA 1136064
222-044 ADSORBENT FRACTIONATORS WITH ELECTRONIC SEQUENCE TIMER CYCLE CONTROL AND PROCESS ABSTRACT OF THE DISCLOSURE A method and apparatus are provided for adsorbing one or more first gases from a mixture thereof with a second gas to reduce the concentration of first gas in the mixture to below a permissible maximum concentration by passing the mixture in contact with and from one end to another end of one of two beds of a sorbent having a preferential affinity for the first gas, adsorbing first gas thereon to form a gaseous effluent having a concentration thereof below the maximum, while passing a purge flow of gaseous effluent through the other of the two beds of sorbent to desorb first gas adsorbed thereon, regenerating the other bed for another cycle of adsorption; periodically interchanging the beds so that, alternately, one bed is on regeneration and the other on the adsorption portions of the cycle; timing the cycling in fixed timing intervals determined electronically by a combination of digital integrated circuitry including a time delay oscillator, a binary counter and a logic module and controlling cycling time at a period not shorter than the regeneration time; and switching the sorbent beds at the end of such cycling time.
348616
Gowling Lafleur Henderson Llp
Pall Corporation
LandOfFree
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