Back to results
US 10,730,006 B2Granted
Port separation for rotary bed PSA
AssigneeAir Products and Chemicals, Inc.
InventorsGlenn Paul Wagner, Xue Mei Liu, Jinzhong Liu, Roger Dean Whitley, Shubhra Jyoti Bhadra, Michael Jamie McKerrow
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a stator plate for a rotary bed PSA apparatus that has an exhaust slot that has first and second sections for receiving blowdown and purge exhaust gas streams, the sections being separated by a flow restriction that restricts but does not full prevent gas flow between the sections, or that has separate exhaust slots for separately receiving the blowdown and purge exhaust gas streams. Also disclosed is pressure swing adsorption (PSA) apparatus including such a stator plate, and a rotary bed PSA process using such an apparatus.
Claims27
A rotary bed pressure swing adsorption (PSA) apparatus comprising a rotor assembly and first and second stator assemblies, wherein:
- the rotor assembly is positioned between the first and second stator assemblies and comprises a plurality of adsorption beds each bed having a rotor port at either end of the bed via which gas enters or exits said bed,
- the first stator assembly comprises at least one feed port, at least one exhaust port and a first stator plate having at least one feed slot for directing at least one feed gas stream from the feed port(s) into any of the rotor ports that are in alignment with the slot and at least one exhaust slot for directing flow of exhaust gas streams from any of the rotor ports that are in alignment with the slot to the exhaust port(s), and
- the second stator assembly comprises at least one product port and a second stator plate having at least one product slot for directing flow of at least one product gas stream between the product port(s) and any of the rotor ports that are in alignment with the slot and at least one purge slot for directing flow of at least one purge gas stream into any of the rotor ports that are in alignment with the slot,
- the rotor assembly being rotatable relative to the first and second stator assemblies so as to change the operating modes of individual adsorption beds by changing which rotor ports are in alignment with which slots in the first and second stator plates, wherein when the rotor ports of a bed are in alignment with a feed slot and/or a product slot that bed is in re-pressurization mode or feed mode, when the rotor ports of a bed are in alignment with an exhaust slot and a purge slot that bed is in purge mode, and when the rotor ports of a bed are in alignment with an exhaust slot and are not in alignment with a purge slot that bed is in blowdown mode, and
- wherein either:
- a) the at least one exhaust slot in the first stator plate comprises an exhaust slot that has a first section that is configured to receive a purge exhaust gas stream from at least one adsorption bed in purge mode and a second section that is configured to receive simultaneously a blowdown exhaust gas stream from at least one other adsorption bed in blowdown mode, said first section having an outlet for discharging the purge exhaust gas stream from the stator plate and said second section having a separate outlet for separately discharging the blowdown exhaust gas stream from the stator plate, the first and second sections being separated by a flow restriction that is configured to restrict but not fully prevent gas flow between the sections;
- or
- b) the at least one exhaust slot in the first stator plate comprises a first exhaust slot that is configured to receive a purge exhaust gas stream from at least one adsorption bed in purge mode, and a separate second exhaust slot that is configured to receive simultaneously a blowdown exhaust gas stream from at least one other adsorption bed in blowdown mode, the first exhaust slot having an outlet for discharging the purge exhaust gas stream from the stator plate and the second exhaust slot having a separate outlet for separately discharging the blowdown exhaust gas stream from the stator plate.
5 more elements
A stator plate for a rotary bed pressure swing adsorption (PSA) apparatus, wherein the stator plate has at least one feed slot configured to be capable of directing at least one feed gas stream to at least one adsorption bed of the rotary bed PSA apparatus that is in re-pressurization or feed mode, and wherein either:
- a) the stator plate further has an exhaust slot that has a first section that is configured to be capable of receiving a purge exhaust gas stream from at least one adsorption bed of the rotary bed PSA apparatus that is in purge mode and a second section that is configured to be capable of receiving simultaneously a blowdown exhaust gas stream from at least one other adsorption bed of the rotary bed PSA apparatus that is in blowdown mode, said first section having an outlet for discharging the purge exhaust gas stream from the stator plate and said second section having a separate outlet for separately discharging the blowdown exhaust gas stream from the stator plate, the first and second sections of the slot being separated by a flow restriction that is configured to restrict but not fully prevent gas flow between the sections;
- or
- b) the stator plate further has a first exhaust slot that is configured to be capable of receiving a purge exhaust gas stream from at least one adsorption bed of the rotary bed PSA apparatus that is in purge mode, and has a separate second exhaust slot that is configured to be capable of receiving simultaneously a blowdown exhaust gas stream from at least one other adsorption bed of the rotary bed PSA apparatus that is in blowdown mode, the first exhaust slot having an outlet for discharging the purge exhaust gas stream from the stator plate and the second exhaust slot having a separate outlet for separately discharging the blowdown exhaust gas stream from the stator plate.
A rotary bed pressure swing adsorption (PSA) process comprising subjecting each of a plurality of adsorption beds to a PSA cycle comprising a feed step during which the adsorption bed is in feed mode, a blowdown step during which the adsorption bed is in blowdown mode, a purge step during which the adsorption bed is in purge mode, an a re-pressurization step during which the adsorption bed is in re-pressurization mode, wherein:
- the adsorption beds are located in a rotor assembly that is positioned between the first and second stator assemblies, each bed having a rotor port at either end of the bed via which gas enters or exits said bed,
- the first stator assembly comprises at least one feed port, at least one exhaust port and a first stator plate having at least one feed slot for directing at least one feed gas stream from the feed port(s) into any of the rotor ports that are in alignment with the slot and at least one exhaust slot for directing flow of exhaust gas streams from any of the rotor ports that are in alignment with the slot to the exhaust port(s),
- the second stator assembly comprises at least one product port and a second stator plate having at least one product slot for directing flow of at least one product gas stream between the product port(s) and any of the rotor ports that are in alignment with the slot at least one purge slot for directing flow of at least one purge gas stream into any of the rotor ports that are in alignment with the slot,
- the rotor assembly being rotated relative to the first and second stator assemblies so as to change the operating modes of individual adsorption beds by changing which rotor ports are in alignment with which slots in the first and second stator plates, wherein when the rotor ports of a bed are in alignment with a feed slot and/or a product slot that bed is in re-pressurization or feed mode, when the rotor ports of a bed are in alignment with an exhaust slot and a purge slot that bed is in purge mode, and when the rotor ports of a bed are in alignment with an exhaust slot and are not in alignment with a purge slot that bed is in blowdown mode, and
- wherein either:
- a) the at least one exhaust slot in the first stator plate comprises an exhaust slot that has a first section that receives a purge exhaust gas stream from at least one adsorption bed in purge mode and a second section that receives simultaneously a blowdown exhaust gas stream from at least one other adsorption bed in blowdown mode, said first section having an outlet for discharging the purge exhaust gas stream from the stator plate and said second section having a separate outlet for separately discharging the blowdown exhaust gas stream from the stator plate, the first and second sections of the slot being separated by a flow restriction that restricts but does not fully prevent gas flow between the sections;
- or
- b) the at least one exhaust slot in the first stator plate comprises a first exhaust slot that receives a purge exhaust gas stream from at least one adsorption bed in purge mode, and a separate second exhaust slot that receives simultaneously a blowdown exhaust gas stream from at least one other adsorption bed in blowdown mode, the first exhaust slot having an outlet for discharging the purge exhaust gas stream from the stator plate and the second exhaust slot having a separate outlet for separately discharging the blowdown exhaust gas stream from the stator plate.
5 more elements
Dependencies are inferred from the claim text.