Patent ID: 11964231
Assignee: HAFFMANS B.V.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B

Claim 6:
7. An apparatus for separating a gas mixture having at least two components, comprising:
a first membrane stage in fluid communication with a gas source comprising a reservoir of the gas mixture, wherein the first membrane stage separates the gas mixture into a first retentate stream and a first permeate stream;
a second membrane stage in fluid communication with the first permeate stream, wherein the second membrane stage separates the first permeate stream into a second retentate stream and a second permeate stream;
a continuing stream that places the second retentate stream in fluid communication with the first retentate stream to form a mixed retentate stream;
a third membrane stage designed to separate the mixed retentate stream into a third permeate stream and a third retentate stream;
a first gas transport device having an inlet in fluid communication with the second retentate and an outlet in fluid communication with the continuing stream;
a controller in communication with at least one measuring device, the controller adapted to execute a stored program to adjust a speed of rotation of the first gas transport device to obtain a desired pressure set-point in the continuing stream; and
wherein the speed of rotation of the first gas transport device is adjusted in response to a change in one or more process parameters measured by the at least one measuring device.