公开(公告)号：US20090188280A1

公开(公告)日：2009-07-30

申请号：US12282606

申请日：2007-03-06

申请人： Alexander Alekseev ,  Dietrich Rottmann ,  Florian Schliebitz ,  Dirk Schwenk

发明人： Alexander Alekseev ,  Dietrich Rottmann ,  Florian Schliebitz ,  Dirk Schwenk

IPC分类号： F25J3/08

CPC分类号： F25J3/04454 ,  F25J3/04054 ,  F25J3/0409 ,  F25J3/04175 ,  F25J3/04193 ,  F25J3/04296 ,  F25J3/04303 ,  F25J3/04393 ,  F25J3/04412 ,  F25J2240/04

摘要： The process and the device are used for low-temperature separation of air with a distilling-column system for nitrogen-oxygen separation (20), which has at least one separation column (21, 22). A main air stream (1, 5) is compressed in an air compressor (2) and purified in a purification device (4). A first air stream (7) and a second air stream (8) are diverted from the main air stream (5). The first air stream (7) is further compressed in two secondary compressors (10, 13) that are connected in series. The further compressed first air stream (15) is cooled by indirect heat exchange (16), and at least partially liquefied or pseudo-liquefied, and then introduced into the distilling-column system for nitrogen-oxygen separation (20). The second air stream (8) is cooled by indirect heat exchange (16) and then, divided into two partial streams (24, 27), is actively depressurized in two expanders (25, 28), whereby the two expanders have essentially the same inlet pressure. The actively depressurized partial streams (26, 29) of the second air stream are introduced (30, 129) at least in part into the distilling-column system for nitrogen-oxygen separation (20). The mechanical energy that is produced in the active depressurization (25, 28) of the second air stream is used at least partially in the driving of the two secondary compressors (10, 13) that are connected in series. A liquid product stream (31) is removed from the distilling-column system for nitrogen-oxygen separation (20), brought to an elevated pressure in the liquid state (32), and evaporated or pseudo-evaporated under this elevated pressure by indirect heat exchange (16) with the first air stream (15), and finally removed as a gaseous product stream (34). Both secondary compressors (10, 13) are operated with an inlet temperature that is higher than 250 K, in particular higher than 270 K.

公开(公告)号：US20130205831A1

公开(公告)日：2013-08-15

申请号：US13816809

申请日：2011-08-09

申请人： Dirk Schwenk ,  Alexander Alekseev ,  Frances Masterson ,  Dimitri Goloubev

发明人： Dirk Schwenk ,  Alexander Alekseev ,  Frances Masterson ,  Dimitri Goloubev

IPC分类号： F25J3/04

CPC分类号： F25J3/04018 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04175 ,  F25J3/0423 ,  F25J3/04296 ,  F25J3/04351 ,  F25J3/04357 ,  F25J3/04387 ,  F25J3/04406 ,  F25J3/04412 ,  F25J3/04448 ,  F25J3/04812 ,  F25J3/04884 ,  F25J3/04933 ,  F25J2200/52 ,  F25J2240/10 ,  F25J2240/12 ,  F25J2240/44

摘要： The invention relates to a method and device for obtaining compressed oxygen and compressed nitrogen by the low-temperature separation of air in a distillation column system for nitrogen-oxygen separation, said distillation column system having at least one high-pressure column (8) and one low-pressure column (460), wherein the low-pressure column (460) is in a heat-exchanging connection with the high-pressure column (8) by means of a main condenser (461) designed as a condenser-evaporator. Feed air is compressed in an air compressor (2). The compressed feed air (6, 734, 802, 840) is cooled down in a main heat exchanger (20) and at least partially introduced into the high-pressure column (8). An oxygen-enriched liquid (462, 465) is removed from the high-pressure column (8) and fed to the low-pressure column (460) at a first intermediate position (464, 467, 906). A nitrogen-enriched liquid (468, 470) is removed from the high-pressure column (8) and/or the main condenser (461) and fed to the head of the low-pressure column (460). A liquid oxygen flow (11, 12) is removed from the distillation column system for nitrogen-oxygen separation, brought to an elevated pressure in the liquid state (13), introduced into the main heat exchanger (20) at said elevated pressure, evaporated or pseudo-evaporated and heated to approximately ambient temperature in the main heat exchanger (20), and finally obtained as a gaseous compressed oxygen product (14). A high-pressure process flow (34, 734) is brought into indirect heat exchange with the oxygen flow in the main heat exchanger (20) and then depressurized (36, 38; 736, 738), wherein the depressurized high-pressure flow (37, 737) is introduced at least partially in the liquid state into the distillation column system for nitrogen-oxygen separation. A gaseous circuit nitrogen flow (18, 19) is drawn from the high-pressure column and at least partially (21) compressed in a circuit compressor (22). A first sub-flow (45, 46; 244, 242, 230; 845, 846) of the circuit nitrogen flow is removed from the circuit compressor (22, 322), cooled down in the main heat exchanger (20), at least partially condensed in the bottom evaporator (9, 209) of the high-pressure column (8) in indirect heat exchange with the bottom liquid of the high-pressure column (8), and conducted back into the distillation column system for nitrogen-oxygen separation. A second sub-flow of the circuit nitrogen flow is branched off upstream and/or downstream of the circuit compressor and/or from an intermediate stage of the circuit compressor at a product pressure (P, P1, P2, P3, P4) and obtained as a compressed nitrogen product (27, 29, 53, 564, 565). The circuit compressor (22, 322) is designed as a hot compressor and is driven by means of external energy.

公开(公告)号：US09733014B2

公开(公告)日：2017-08-15

申请号：US13816809

申请日：2011-08-09

申请人： Dirk Schwenk ,  Alexander Alekseev ,  Frances Masterson ,  Dimitri Goloubev

发明人： Dirk Schwenk ,  Alexander Alekseev ,  Frances Masterson ,  Dimitri Goloubev

IPC分类号： F25J3/06 ,  F25J3/04

CPC分类号： F25J3/04018 ,  F25J3/04084 ,  F25J3/0409 ,  F25J3/04175 ,  F25J3/0423 ,  F25J3/04296 ,  F25J3/04351 ,  F25J3/04357 ,  F25J3/04387 ,  F25J3/04406 ,  F25J3/04412 ,  F25J3/04448 ,  F25J3/04812 ,  F25J3/04884 ,  F25J3/04933 ,  F25J2200/52 ,  F25J2240/10 ,  F25J2240/12 ,  F25J2240/44

摘要： The invention relates to a method and device for obtaining compressed oxygen and compressed nitrogen by the low-temperature separation of air in a distillation column system for nitrogen-oxygen separation, said distillation column system having at least one high-pressure column (8) and one low-pressure column (460), wherein the low-pressure column (460) is in a heat-exchanging connection with the high-pressure column (8) by means of a main condenser (461) designed as a condenser-evaporator. Feed air is compressed in an air compressor (2). The compressed feed air (6, 734, 802, 840) is cooled down in a main heat exchanger (20) and at least partially introduced into the high-pressure column (8). An oxygen-enriched liquid (462, 465) is removed from the high-pressure column (8) and fed to the low-pressure column (460) at a first intermediate position (464, 467, 906). A nitrogen-enriched liquid (468, 470) is removed from the high-pressure column (8) and/or the main condenser (461) and fed to the head of the low-pressure column (460). A liquid oxygen flow (11, 12) is removed from the distillation column system for nitrogen-oxygen separation, brought to an elevated pressure in the liquid state (13), introduced into the main heat exchanger (20) at said elevated pressure, evaporated or pseudo-evaporated and heated to approximately ambient temperature in the main heat exchanger (20), and finally obtained as a gaseous compressed oxygen product (14). A high-pressure process flow (34, 734) is brought into indirect heat exchange with the oxygen flow in the main heat exchanger (20) and then depressurized (36, 38; 736, 738), wherein the depressurized high-pressure flow (37, 737) is introduced at least partially in the liquid state into the distillation column system for nitrogen-oxygen separation. A gaseous circuit nitrogen flow (18, 19) is drawn from the high-pressure column and at least partially (21) compressed in a circuit compressor (22). A first sub-flow (45, 46; 244, 242, 230; 845, 846) of the circuit nitrogen flow is removed from the circuit compressor (22, 322), cooled down in the main heat exchanger (20), at least partially condensed in the bottom evaporator (9, 209) of the high-pressure column (8) in indirect heat exchange with the bottom liquid of the high-pressure column (8), and conducted back into the distillation column system for nitrogen-oxygen separation. A second sub-flow of the circuit nitrogen flow is branched off upstream and/or downstream of the circuit compressor and/or from an intermediate stage of the circuit compressor at a product pressure (P, P1, P2, P3, P4) and obtained as a compressed nitrogen product (27, 29, 53, 564, 565). The circuit compressor (22, 322) is designed as a hot compressor and is driven by means of external energy.

公开(公告)号：US06612129B2

公开(公告)日：2003-09-02

申请号：US10284479

申请日：2002-10-31

申请人： Dirk Schwenk

发明人： Dirk Schwenk

IPC分类号： F25J300

CPC分类号： F25J3/04878 ,  F25J3/0409 ,  F25J3/04284 ,  F25J3/0429 ,  F25J3/04296 ,  F25J3/04309 ,  F25J3/04375 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04703 ,  F25J3/04727 ,  F25J3/04745 ,  F25J2200/32 ,  F25J2205/02 ,  F25J2205/04 ,  F25J2235/02 ,  F25J2235/50 ,  F25J2235/52 ,  F25J2235/58 ,  F25J2250/04 ,  Y10S62/925

摘要： In a process and apparatus used to produce krypton and/or xenon by low-temperature fractionation of air, compresses and clean charge air (1) is introduced into a rectification system for nitrogen-oxygen separation. The rectification system includes at least a high-pressure column (2) and a low-pressure column (3). A krypton- and xenon-containing fraction (13, 14, 15, 16) is removed from the high-pressure column (2) and introduced into the evaporation space of a condenser-evaporator (17), where it is partially evaporated. A purge liquid (26) is extracted from the evaporation space of the condenser-evaporator (17) and fed to a krypton-xenon enrichment column (24). A krypton-xenon concentrate (30) is removed from the krypton-xenon enrichment column (24). A liquid from the lower region of the krypton-xenon enrichment column (24) is introduced into a second condenser-evaporator (27), which is separate from the first condenser-evaporator (17).

摘要翻译： 在用于通过空气的低温分馏产生氪和/或氙的方法和装置中，将压缩和清洁的增压空气（1）引入用于氮 - 氧分离的精馏系统中。 整流系统至少包括高压塔（2）和低压塔（3）。 将含氪和氙的馏分（13,14,15,16）从高压塔（2）中取出并引入冷凝器 - 蒸发器（17）的蒸发空间中，在其中被部分蒸发。 从冷凝器 - 蒸发器（17）的蒸发空间抽取清洗液（26）并送入氪 - 氙浓缩塔（24）。 将氪 - 氙浓缩物（30）从氪 - 氙浓缩塔（24）中去除。 来自氪 - 氙浓缩塔（24）的下部区域的液体被引入与第一冷凝器 - 蒸发器（17）分开的第二冷凝器 - 蒸发器（27）。