초록 ▼

A molecular sieve type gas separation system capable of delivering a product gas of controlled variable composition and being especially useful for the production of oxygen-gas for aircrew, has an apparatus for controlling the regeneration of the or each sieve bed so as to achieve delivery of the pr

A molecular sieve type gas separation system capable of delivering a product gas of controlled variable composition and being especially useful for the production of oxygen-gas for aircrew, has an apparatus for controlling the regeneration of the or each sieve bed so as to achieve delivery of the product gas with a constituent concentration which is variably selectable within a predetermined range of values.

대표청구항 ▼

A molecular sieve type gas separation system comprising: a plurality of interconnected beds containing adsorptive material for retaining at least one constituent of a gaseous mixture supplied to the system to produce a product gas; a control means for operating each said bed in a relatively phased c

A molecular sieve type gas separation system comprising: a plurality of interconnected beds containing adsorptive material for retaining at least one constituent of a gaseous mixture supplied to the system to produce a product gas; a control means for operating each said bed in a relatively phased cycle having a period of adsorption and a period of regeneration, said control means including an inlet valve means for passing the gaseous mixture into each said bed sequentially, back-flush valve means for passing a portion of the product gas delivered by an adsorping bed to back-flush another bed for desorption or regeneration of said another bed, an adjustable vent valve means for discharging of the back-flushing gas from said another bed, and a sensing means for monitoring a physical paramenter of the system gases and for precisely controlling said vent valve means to adjustably regulate the regenerating gas flow therethrough and hence the advance of the retained constituent in said another bed during regeneration thereof so that when said another bed is in a period of adsorption a product gas having an average concentration level of a chosen value is produced and only that amount of product gas necessary to back-flush said another bed for the desired position of the retained constituent is lost during regenerating of said another bed.