RU2011118883A - Удаление азота из природного газа - Google Patents

Удаление азота из природного газа Download PDF

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RU2011118883A
RU2011118883A RU2011118883/06A RU2011118883A RU2011118883A RU 2011118883 A RU2011118883 A RU 2011118883A RU 2011118883/06 A RU2011118883/06 A RU 2011118883/06A RU 2011118883 A RU2011118883 A RU 2011118883A RU 2011118883 A RU2011118883 A RU 2011118883A
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nitrogen
fraction
stream
rectification
cooled
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RU2011118883/06A
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RU2559413C2 (ru
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Хайнц БАУЭР (DE)
Хайнц БАУЭР
Мартин ГВИННЕР (DE)
Мартин ГВИННЕР
Даниэль ГАРТЕ (DE)
Даниэль ГАРТЕ
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Линде Акциенгезелльшафт (De)
Линде Акциенгезелльшафт
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    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
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    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
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Abstract

1. Способ разложения азотосодержащей исходной фракции (1, 101) с высоким содержанием углеводородов, предпочтительно природного газа, ! a) при этом исходную фракцию (1, 101), по меньшей мере, частично сжижают (E1, E2) и методом ректификации (T1) разделяют на обогащенную азотом фракцию (14, 110) и обедненную азотом фракцию (11, 111) с высоким содержанием углеводородов, и ! b) при этом в верхней зоне ректификации (T1) обогащенный азотом поток (14) отводят, охлаждают (E3) и, по меньшей мере, частично подают на ректификацию (T1) в качестве возвратного продукта (20), и/или ! c) обогащенную азотом фракцию (110) охлаждают и частично конденсируют (E3), по меньшей мере, частично подают на ректификацию (T1) в качестве возвратного продукта (115), и остаточный поток (116) обогащенной азотом фракции (110) подвергают процессу в двух колоннах (T3), ! отличающийся тем, что ! d) в средней зоне ректификации (T1) поток (13, 113) с низким содержанием двуокиси углерода, который используют для охлаждения (E3) обогащенного азотом частичного потока (14), и/или охлаждения обогащенной азотом фракции (110), отводят и ! e) ректификацию (T1) исходной фракции осуществляют в снабженной разделительной перегородкой (W) разделительной колонне (T1), при этом разделительная перегородка (W) расположена, по меньшей мере, в той зоне разделительной колонны (T1), где в разделительную колонну (T1) подводят исходную фракцию (2, 4, 5, 102, 104, 105) и отводят поток (13, 113) с низким содержанием двуокиси углерода. ! 2. Способ по п.1, отличающийся тем, что поток (13, 113) с низким содержанием двуокиси углерода расширяют (V5) перед теплообменом (E3) с подлежащим охлаждению обогащенным азотом потоком (14) и/или перед теплообменом (E3) с подлежащей охлаждени�

Claims (6)

1. Способ разложения азотосодержащей исходной фракции (1, 101) с высоким содержанием углеводородов, предпочтительно природного газа,
a) при этом исходную фракцию (1, 101), по меньшей мере, частично сжижают (E1, E2) и методом ректификации (T1) разделяют на обогащенную азотом фракцию (14, 110) и обедненную азотом фракцию (11, 111) с высоким содержанием углеводородов, и
b) при этом в верхней зоне ректификации (T1) обогащенный азотом поток (14) отводят, охлаждают (E3) и, по меньшей мере, частично подают на ректификацию (T1) в качестве возвратного продукта (20), и/или
c) обогащенную азотом фракцию (110) охлаждают и частично конденсируют (E3), по меньшей мере, частично подают на ректификацию (T1) в качестве возвратного продукта (115), и остаточный поток (116) обогащенной азотом фракции (110) подвергают процессу в двух колоннах (T3),
отличающийся тем, что
d) в средней зоне ректификации (T1) поток (13, 113) с низким содержанием двуокиси углерода, который используют для охлаждения (E3) обогащенного азотом частичного потока (14), и/или охлаждения обогащенной азотом фракции (110), отводят и
e) ректификацию (T1) исходной фракции осуществляют в снабженной разделительной перегородкой (W) разделительной колонне (T1), при этом разделительная перегородка (W) расположена, по меньшей мере, в той зоне разделительной колонны (T1), где в разделительную колонну (T1) подводят исходную фракцию (2, 4, 5, 102, 104, 105) и отводят поток (13, 113) с низким содержанием двуокиси углерода.
2. Способ по п.1, отличающийся тем, что поток (13, 113) с низким содержанием двуокиси углерода расширяют (V5) перед теплообменом (E3) с подлежащим охлаждению обогащенным азотом потоком (14) и/или перед теплообменом (E3) с подлежащей охлаждению обогащенной азотом фракцией (110).
3. Способ по п.1 или 2, отличающийся тем, что, по меньшей мере, один частичный поток (7) отводимой из разделительной колонны (T1) обогащенной азотом фракции (6) расширяют (X1) с получением холода.
4. Способ по п.1 или 2, отличающийся тем, что отводимую из разделительной колонны (T1) обедненную азотом фракцию (11, 111) с высоким содержанием углеводородов расширяют (V4), испаряют и перегревают (E1), и затем предпочтительно сжимают.
5. Способ по п.1 или 2, отличающийся тем, что разделительную колонну (T1) эксплуатируют при давлении от 15 до 35 бар, предпочтительно от 25 до 30 бар.
6. Способ по п.1 или 2, отличающийся тем, что частичный поток (124) полученной посредством процесса в двух колоннах (T3) жидкой фракции (118) с высоким содержанием азота расширяют (V11), испаряют и перегревают (E4), и добавляют в служащий хладагентом поток (123) с низким содержанием двуокиси углерода.
RU2011118883/06A 2010-05-12 2011-05-11 Удаление азота из природного газа RU2559413C2 (ru)

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