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公开(公告)号：US5122355A
公开(公告)日：1992-06-16
申请号：US533848
申请日：1990-06-06
申请人： Ravi Prasad , Oscar W. Haas , Frank Notaro , David R. Thompson
发明人： Ravi Prasad , Oscar W. Haas , Frank Notaro , David R. Thompson
CPC分类号： B01D53/229 , C01B21/0494 , C01B2210/0006 , C01B2210/001
摘要： Feed air is separated in a membrane system, with recovered nitrogen being purified in a deoxo unit and dried in an adsorbent dryer using high temperature purge gas. The heat generated in the deoxo unit can be used to satisfy the thermal energy requirements of dryer regeneration, without decrease in product recovery. Membrane permeate gas can be used for purge at high purge/feed ratio to reduce the energy requirements of bed regeneration.
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公开(公告)号：US5116396A
公开(公告)日：1992-05-26
申请号：US539808
申请日：1990-06-18
申请人： Ravi Prasad , Frank Notaro , Oscar W. Haas
发明人： Ravi Prasad , Frank Notaro , Oscar W. Haas
CPC分类号： F25J3/04636 , B01D53/226 , B01D53/229 , B01D53/268 , F25J3/04163 , F25J3/04181 , F25J2205/40 , F25J2205/60 , F25J2205/70 , F25J2205/80 , Y02C10/08
摘要： Feed air to a prepurifier adsorption system/cryogenic air separation system for dry, high purity nitrogen and/or oxygen production is dried in a membrance dryer preferably characterized by a countercurrent flow path. Drying is enhanced by the use of purge gas on the permeate side of the membrane dryer, with adsorption system or cryogenic air separation system product or waste gas, dried feed air or ambient air being used as purge gas. Two membrane materials are employed in the membrane dryer, in a single stage or in two stages, for enhanced removal of water and carbon dioxide from the feed air.
摘要翻译： 用于干燥，高纯度氮气和/或氧气生产的预纯化器吸附系统/低温空气分离系统的进料空气在膜干燥器中干燥，其优选地以逆流流动路径为特征。 通过在膜干燥器的渗透侧使用吹扫气体，使用吸附系统或低温空气分离系统产物或废气，干燥的进料空气或环境空气作为吹扫气体来增强干燥。 在膜干燥器中采用两个膜材料，在一个阶段或两个阶段中，以增强从进料空气中除去水和二氧化碳。
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公开(公告)号：US4881953A
公开(公告)日：1989-11-21
申请号：US244419
申请日：1988-09-15
申请人： Ravi Prasad , Oscar W. Haas
发明人： Ravi Prasad , Oscar W. Haas
CPC分类号： B01D53/229 , B01D2253/102 , B01D2253/104 , B01D2253/108 , B01D2257/702 , B01D2259/40083 , B01D2259/402 , B01D53/04
摘要： In the separation of gases in a membrane system, degradation of membrane permeability is prevented by passing the feed gas mixture through a bed of adsorbent material, preferably activated carbon, to adsorb the heavier hydrocarbon contaminants responsible for degradation without removal of lighter hydrocarbons.
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公开(公告)号：US5004482A
公开(公告)日：1991-04-02
申请号：US350772
申请日：1989-05-12
申请人： Oscar W. Haas , Ravi Prasad , James Smolarek
发明人： Oscar W. Haas , Ravi Prasad , James Smolarek
CPC分类号： B01D53/229 , C01B21/0438 , C01B21/045 , C01B2210/0062
摘要： Wet feed air to, or high purity nitrogen from, a pressure swing adsorption system is dried in a dryer membrane system preferably operated with a countercurrent flow path. Drying is enhanced by the use of a purge gas on the permeate side of the membrane, with waste gas from the pressure swing adsorption system or a portion of the dry, high purity nitrogen product gas being used as purge gas.
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公开(公告)号：US4934148A
公开(公告)日：1990-06-19
申请号：US350848
申请日：1989-05-12
申请人： Ravi Prasad , Oscar W. Haas , Harry Cheung
发明人： Ravi Prasad , Oscar W. Haas , Harry Cheung
CPC分类号： F25J3/04636 , B01D53/226 , B01D53/229 , B01D53/268 , F25J2205/40 , F25J2205/60 , F25J2205/80 , Y02C10/08
摘要： Feed air to a prepurifier adsorption system/cryogenic air separation system for dry, high purity nitrogen and/or oxygen production is dried in a membrane dryer preferably characterized by a countercurrent flow path. Drying is enhanced by the use of purge gas on the permeate side of the membrane dryer, which adsorption system or cryogenic air separation system product or waste gas, dried feed air or ambient air being used as purge gas.
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