US 12,128,347 B2
Energy efficient VPSA system with direct drive high speed centrifugal compressors
Andrew C. Rosinski, Orchard Park, NY (US); Nicholas R. Stuckert, Grand Island, NY (US); and Yang Luo, Amherst, NY (US)
Assigned to PRAXAIR TECHNOLOGY, INC., Danbury, CT (US)
Appl. No. 17/617,164
Filed by PRAXAIR TECHNOLOGY, INC., Danbury, CT (US)
PCT Filed Nov. 5, 2020, PCT No. PCT/US2020/059090
§ 371(c)(1), (2) Date Dec. 7, 2021,
PCT Pub. No. WO2021/096752, PCT Pub. Date May 20, 2021.
Claims priority of provisional application 62/935,931, filed on Nov. 15, 2019.
Prior Publication US 2022/0258094 A1, Aug. 18, 2022
Int. Cl. B01D 53/04 (2006.01); B01D 53/047 (2006.01)
CPC B01D 53/0446 (2013.01) [B01D 53/0476 (2013.01); B01D 2253/1085 (2013.01); B01D 2257/102 (2013.01); B01D 2257/104 (2013.01); B01D 2259/40007 (2013.01); B01D 2259/402 (2013.01)] 15 Claims
OG exemplary drawing
 
9. A method for operating a PSA or VPSA adsorption system for gas separation said system comprising:
a. at least one vessel containing at least one adsorption bed comprising at least one adsorption material, wherein the at least one bed is configured for cyclical pressurization and depressurization during operation;
b. at least one centrifugal compressor driven by a variable speed direct drive high-speed permanent magnet motor or high-speed induction motor; and
c. adjusting the speed of said at least one centrifugal compressor in response to data signals for conditions in the system such that the at least one centrifugal compressor can operate at a designated speed; and
d. a product compressor configured to deliver the desired product pressure at average and peak production capacity,
wherein during times of reduced product demand, said method comprises lowering the top adsorption pressure to a range of from about 75% to 90% of design operation pressure of said at least one adsorption vessel to lower production capacity while achieving higher energy efficiency.