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US 4,315,759 AGranted
Adsorption process producing chronologically constant amount of a residual gas
AssigneeLinde Aktiengesellschaft
InventorChristian Benkmann
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AssigneeLinde Aktiengesellschaft
InventorChristian Benkmann
Estimating the term…
An adsorption process for purifying or fractionating a gaseous feed mixture comprises an adsorption phase, at least one expansion phase, a purging phase and at least one pressure build-up phase. The expansion phase(s) and the purging phase produce residual process gas fractions. The sum total of volume, and/or mass streams of the residual process gas fractions comprises a residual gas stream which is maintained chronologically substantially constant by controlling the volume and/or gas streams of the gas entering the purging phase and maintaining the gas leaving the expansion phase(s) at a substantially constant value, dependent on the desired mass and/or volume quantity of the residual gas stream. The length of the purging phase and of the expansion phase(s) is adjusted accordingly so that the relationship of the length of time of the purging phase to the length of time of the expansion phase(s) is substantially the same as the relationship of the volume and/or mass of the gas fractions obtained during the purging to those obtained during the expansion phase(s), respectively. The control of the purging and of the expansion phase(s) can also be varied in response to a flow rate of a feed gas entering the process.
In a process for the adsorptive purification or fractionation of a gaseous mixture with several cyclically reversible adsorbers, by adsorbing at least one gaseous component of the gaseous mixture in the adsorbers, each of the adsorbers passing, with chronological displacement, through respectively substantially identical switching cycles, each switching cycle comprising an adsorption phase, at least one expansion phase, a purging phase operated with a purging gas and at least one pressure build-up phase, wherein the at least one expansion phase and the purging phase each produce gas fractions enriched in the at least one gaseous component, the sum total of the gas fractions comprising a residual gas stream, the improvement wherein the volume or mass of the residual gas stream is maintained chronologically substantially constant by regulating the respective volume streams and/or mass streams of the gas fractions obtained during the at least one expansion phase and the volume streams or mass streams of the purging gas introduced into the adsorber during the purging phase.
In a process for the adsorptive purification or fractionation of a gaseous mixture with several cyclically reversible adsorbers, by adsorbing at least one gaseous component of the gaseous mixture in the adsorbers, each of the adsorbers passing, in a chronologically cyclically displaced manner with respect to each other, through respectively substantially identical switching cycles, each switching cycle comprising an adsorption phase, a purging phase operated with a purging gas, and at least one pressure build-up phase, wherein the at least one expansion phase and the purging phase each produce gas fractions enriched in the at least one gaseous component, the sum total of the gas fractions comprising a residual gas stream, the improvement comprising:
In an apparatus for the adsorptive purification or fractionation of a gaseous mixture, the apparatus including at least three interconnected adsorbers for adsorbing at least one gaseous component of the gaseous mixture, and each adsorber adapted to operate in identical switching cycles comprised of an adsorption phase, at least one expansion phase, a purging phase, and at least one pressure build-up phase, the adsorbers arranged for operation in a chronologically cyclically displaced manner with respect to each other, whereby the adsorbers are adapted to produce gas fractions enriched in the at least one gaseous component during the respective at least one expansion phase and the purging phase thereof, the sum total of the gaseous fractions produced by the at least three adsorbers comprising a residual gas stream, the adsorbers having respective outlets for releasing the gaseous fractions with the outlets connecting into one outlet line for passing the residual gas stream therethrough, and lines interconnecting the adsorbers with each other for passing gas released from one adsorber during the at least one expansion phase thereof to another adsorber as the purge gas therefor, the improvement comprising:
Dependencies are inferred from the claim text.