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Pressure Swing Adsorption cycles for 4 to 7 adsorption beds

IP.com Disclosure Number: IPCOM000241449D
Publication Date: 2015-Apr-29

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The IP.com Prior Art Database

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Pressure Swing Adsorption cycles for 4 to 7 adsorption beds

Background

     See EP 2823872, and U.S. Pat. Publication No. 2015/0373713, incorporated herein by reference. Detailed Description

     Pressure swing adsorption cycle charts are shown in Figures 1 to 38. The abbreviations used for each of the cycle steps are as described in EP 2823872 and US 2015/0373713.

     Each of the cycles is characterized by a series of three numbers. The first number for each cycle refers to the number of adsorption beds. The second number refers to the number of beds on the production step at the same time. If during the cycle 2 beds are on the production step for part of the cycle and 1 bed is on the production step for part of the cycle, the cycle is given the designation of 1.5 beds on the production step. (cf. FIGS. 19 and 20). The third number refers to the number of paired depressurizing equalization (DEQ# including hybrid forms thereof) and pressurizing equalization (PEQ# including hybrid forms thereof) steps in the cycle. In FIG. 1 then, 4/1/1 means 4 adsorption beds, 1 bed on the production step at any time, and 1 pair of depressurizing equalization and pressurizing equalization steps.

Any of these cycles can be modified as described in EP 2823872 and US 2015/0373713.

     In the figures, REPR represents a repressurization step, which can be product pressurization (PP), feed pressurization (FP), or hybrid product pressurization/feed pressurization (PP/FP).

     In the figures, P/(SP) means that it is a production step when feed pressurization is used and a hybrid production/supply product step when product pressurization or hybrid product pressurization/feed pressurization is used.

     In the figures, DEQ#, represents any of the depressurizing equalization steps, DEQp#, DEQf#, or DEQd#, where # is an integer number depending on its arrangement in the PSA cycle and how many depressurizing equalization steps are present in the PSA cycle.

     In the figures, PEQ#, represents any of the depressurizing equalization steps, PEQp#, PEQf#, or PEQd#, where # is an integer number depending on its arrangement in the PSA cycle and how many depressurizing equalization steps are present in the PSA cycle.

     In the figures, if a DEQ# step and PEQ# step occur contemporaneously, gas can be transferred directly from the adsorbent vessel undergoing DEQ# to the adsorbent vessel undergoing PEQ#. In the figures, if a DEQ# step and PEQ# step do not occur contemporaneously, gas can be transferred from the adsorber vessel undergoing DEQ# to the adsorbent vessel undergoing PEQ# through an intermediate storage vessel.

     In the figures SPG, represents a depressurizing step in which the effluent gas is used to purge another adsorbent vessels.

     In the figures PRG, represents a step in which the adsorbent vessel is purge by passing a gas into one end of the adsorbent vessel which withdrawing gas from the other end of the adsorbent vessel. The gas supplied to the adsorbent vessel may come from another ves...