Method for adjusting the purity of oxygen generated by an...

B - Operations – Transporting – 01 – D

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B01D 53/04 (2006.01) B01D 53/047 (2006.01) C01B 13/02 (2006.01)

Patent

CA 2761188

The invention relates to a method for producing gaseous oxygen by adsorption from compressed air, comprising: a) using at least one adsorption unit for generating gaseous oxygen having a purity greater than or equal to a predetermined purity threshold value (VPS) and according to a variable production flow rate (Dp); b) recovering the gaseous oxygen produced in a); c) measuring the purity of the gaseous oxygen (Pp) produced in step a) and comparing same with a preset purity threshold value (VPS); and d) adjusting the oxygen production flow rate (Dp) on the basis of the comparison of step c) such that: i) reducing the oxygen production flow rate (Dp) when the oxygen purity (Pp) measured in step c) is such that VPS > Pp; or ii) increasing the production flow rate (Dp) when the oxygen purity determined in step c) is such that VPS < Pp in order to obtain a gaseous oxygen purity (Pp) such that VPS = Pp + X, with X < 0.5 %, X being the standard deviation.

Procédé de production par adsorption d'oxygène gazeux à partir d'air comprimé, dans lequel : a) on produit au moyen d'au moins une unité d' adsorption, de l'oxygène gazeux ayant une pureté supérieure ou égale à une valeur de pureté-seuil (VPS) donnée et selon un débit de production (Dp) variable, b) on récupère l'oxygène gazeux produit en a), c) on mesure la pureté en oxygène gazeux (Pp) produit à l'étape a) et on la compare avec la valeur de pureté-seuil (VPS) préfixée, et d) on ajuste le débit de production d'oxygène (Dp) en fonction de la comparaison faite à l'étape c) de manière telle que : i) on réduit le débit (Dp) de production d'oxygène lorsque la pureté (Pp) de l'oxygène mesurée à l'étape c) est telle que : VPS > Pp,- ou ii) on augmente le débit (Dp) de production lorsque la pureté (Pp) en oxygène déterminée à l'étape c) est telle que : VPS < Pp de manière à obtenir une pureté en oxygène gazeux (Pp) telle que : VPS = Pp + X avec X < 0,5 %. X étant l'écart-type

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