Recovery Of Helium From Nitrogen-Rich Streams

Overall power consumption in a cryogenic distillation process for recovering helium from nitrogen-rich gases comprising helium may be reduced if the feed to the distillation column system is at least substantially condensed by indirect heat exchange against a first bottoms liquid at first pressure, and a second bottoms liquid at a second pressure that is different from the first pressure. 1. Apparatus for recovering helium from a nitrogen-rich feed gas comprising helium , said apparatus comprising:a distillation column system for operation at an elevated operating pressure to separate at least partially condensed feed gas into helium-enriched overhead vapor and nitrogen-enriched bottoms liquid(s);an overhead condenser for partially condensing helium-enriched overhead vapor by indirect heat exchange to produce helium-enriched vapor as product and liquid for reflux in the column system;a first heat exchange system for cooling feed gas by indirect heat exchange with a first nitrogen-enriched bottoms liquid to produce cooled feed gas and vapor for the column system;a first pressure reduction device for reducing the pressure of a second nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid;a second heat exchange system for cooling said cooled feed gas by indirect heat exchange against said reduced pressure bottoms liquid to produce at least partially condensed feed gas and vaporized bottoms liquid; anda second pressure reduction device for reducing the pressure of said at least partially condensed feed gas to produce at least partially condensed feed gas at reduced pressure for use as said feed to the distillation column system.2. The apparatus of comprising a third pressure reduction device for reducing the pressure of a third nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid for vaporization by indirect heat exchange in said overhead condenser to produce nitrogen-enriched vapor.3. The apparatus of comprising an expander ...

Treatment Of Nitrogen-Rich Natural Gas Streams

Helium can be recovered from nitrogen-rich natural gas at high pressure with low helium loss by cryogenic distillation of the natural gas after pre-treatment of the gas to remove incompatible impurities and then recovery of natural gas liquid (NGL) from the pre-treated gas by distillation. Overall power consumption may be reduced, particularly if the feed to the helium recovery column system is at least substantially condensed by indirect heat exchange against a first portion of nitrogen-enriched bottoms liquid at first pressure, and a second portion of nitrogen-enriched bottoms liquid at a second pressure that is different from the first pressure. 1. A process for recovering helium and natural gas liquid (NGL) from pressurized natural gas comprising methane , Chydrocarbons , helium and at least about 70% nitrogen , said process comprising:extracting said pressurized natural gas from an underground source;pre-treating said pressurized nitrogen-rich natural gas to remove one or more impurities incompatible with the process and produce pre-treated natural gas;cooling said pre-treated natural gas to produce cooled pre-treated natural gas;{'sub': '2+', 'separating said cooled pre-treated natural gas by distillation in an NGL recovery column system to produce NGL and C hydrocarbon-depleted natural gas comprising helium and methane; and'}{'sub': '2+', 'separating said C hydrocarbon-depleted natural gas by distillation in a helium recovery column system to produce helium-enriched overhead vapor and nitrogen-enriched bottoms liquid comprising methane.'}2. The process of comprising separating said nitrogen-enriched bottoms liquid by distillation in a methane recovery column system to produce nitrogen-enriched overhead vapor and methane-enriched bottoms liquid.3. The process of claim 2 , wherein at least a portion of said nitrogen-enriched bottoms liquid is heated and partially vaporized prior to being fed as feed to said methane recovery column system.4. The process of claim ...

PROCESS AND APPARATUS FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

A process comprises a first set of distillation columns and a second set of distillation columns, a low-pressure column of the first set being connected to a column operating at higher pressure of the second set by means of a gas arriving from the top of the column operating at a higher pressure and/or by means of a fluid arriving from the low-pressure column. 113-. (canceled)14. A process for separating air by cryogenic distillation in an apparatus comprising:i) a first set of distillation columns comprising at least a first column operating at a first pressure referred to as high pressure and a second column operating at a second pressure lower than the first pressure, the top of the first column being thermally connected to the bottom of the second column by means of a first reboiler-condenser, a first purification unit and a first heat exchange line; andii) a second set of distillation columns comprising at least a third column operating at a third pressure lower than the first pressure and a fourth column operating at a fourth pressure lower than the first, the second and the third pressures, the top of the third column being thermally connected to the bottom of the fourth column by means of a second reboiler-condenser, a second purification unit and a second heat exchange line,the method comprising the steps of:sending a first compressed air to the first purification unit to produce a first purified air;sending the first purified air from the first purification unit to the first exchange line to produce a first cooled air;sending the first cooled air from the first exchange line to the first column under conditions effective for the rectification of air;sending a second compressed air to the second purification unit to produce a second purified air;sending the second purified air from the second purification unit to the second exchange line to produce a second cooled air;sending the second cooled air from the second exchange line to the third column under ...

NITROGEN PRODUCTION METHOD AND NITROGEN PRODUCTION APPARATUS

A portion of feed air is expanded and cooled in front of a main heat exchanger, and is used as cold for precooling the remaining unexpanded feed air inside the main heat exchanger. A portion of the feed air precooled inside the main heat exchanger is removed to outside the main heat exchanger, expanded and cooled, and used as cold to cool the remaining unexpanded precooled feed air inside the main heat exchanger. 1. A method for producing a liquid nitrogen product , the method comprising:a precooling step for cooling at least a portion of feed air scrubbed of specified impurities to a first temperature and cooling the precooled feed air;a cooling step for cooling at least a first portion of the feed air cooled by the cooling step to a second temperature lower than the first temperature to produce a low-temperature feed air;a first expanding step for expanding and cooling a second portion of the feed air cooled by the precooling step to produce a first low-temperature air;a second expanding step for expanding and cooling at least a third portion of the feed air to produce a second low-temperature air;a first introducing step for expanding and introducing the feed air cooled by the cooling step into a lower section than a first distilling section in a distillation column having the first distilling section;a condensing step for condensing at least a portion of the gas inside the distillation column by exchanging heat with an oxygen-rich liquid pooled in a lower section of the distillation column by a condensing section arranged in an upper section of the distillation column;a recycled air compressing step for diverting waste gas removed from the condensing section arranged in an upper section of the distillation column and compressing the diverted waste gas;a waste gas heat exchange step for exchanging heat between the not diverted waste gas and either the feed air or the precooled feed air;a second introducing step for introducing the compressed recycled air ...

SOLVENT INJECTION AND RECOVERY IN A LNG PLANT

Implementations described and claimed herein provide systems and methods for processing liquefied natural gas (LNG). In one implementation, a solvent is injected into a feed of natural gas at a solvent injection point. A mixed feed is produced from a dispersal of the solvent into the feed of natural gas. The mixed feed contains heavy components. A chilled feed is produced by chilling the mixed feed. The chilled feed includes a vapor and a condensed liquid. The condensed liquid contains a fouling portion of the heavy components condensed by the solvent during chilling. The liquid containing the fouling portion of the heavy components is separated from the vapor. The vapor is directed into a feed chiller heat exchanger following separation of the liquid containing the fouling portion of the heavy components from the vapor, such that the vapor being directed into feed chiller heat exchanger is free of freezing components. 1. A method for reducing fouling in a liquefied natural gas (LNG) facility , the method comprising:injecting a solvent into a feed of natural gas at a solvent injection point;producing a mixed feed from a dispersal of the solvent into the feed of natural gas, the mixed feed containing heavy components;producing a chilled feed by chilling the mixed feed, the chilled feed including a vapor and a condensed liquid, the condensed liquid containing a fouling portion of the heavy components condensed by the solvent during chilling;separating the condensed liquid containing the fouling portion of the heavy components from the vapor; anddirecting the vapor into a feed chiller heat exchanger following separation of the condensed liquid containing the fouling portion of the heavy components from the vapor, such that the vapor being directed into feed chiller heat exchanger is free of freezing components.2. The method of claim 1 , wherein the condensed liquid containing the fouling portion of the heavy components is separated from the vapor using a drum.3. The ...

Distillation device

A distillation apparatus includes: a distillation column group in which a plurality of distillation columns, which are respectively equipped with a reboiler, is connected in the form of a distillation cascade; feed-gas condensers which liquefy feed gases from respective former distillation columns and feed said liquefied feed gases to respective latter distillation columns; gas-feeding lines which connect the respective former distillation columns and the respective feed-gas condensers; and liquid-feeding lines which connect the respective feed-gas condensers and the respective latter distillation columns.

Method and system for cold air separation

본 발명은 제1 컬럼(11), 제2 컬럼(12), 제3 컬럼(13) 및 제4 컬럼(14)을 갖는 컬럼 시스템(10)을 가진 공기 분리 시스템(100 내지 500)이 사용되는, 저온 공기 분리를 위한 방법으로서, 제1 컬럼(11)으로부터의 유체가 적어도 제2 컬럼(12) 내로 공급되고, 제2 컬럼(12)으로부터의 유체가 적어도 제3 컬럼(13) 내로 공급되고, 제3 컬럼(13)으로부터의 유체가 적어도 제4 컬럼(14) 내로 공급되고, 제4 컬럼(14)으로부터의 유체가 적어도 제3 컬럼(13) 내로 공급되고, 제3 컬럼(13)으로부터 제4 컬럼(14) 내로 공급되는 유체는, 제3 컬럼(13)으로부터 인출되고 제3 섬프 액체보다 더 낮은 산소 함량 및 더 높은 아르곤 함량을 갖는 사이드 유동의 적어도 일부를 포함하는, 저온 공기 분리를 위한 방법에 관한 것이다. 본 발명에 따르면, 귀환 액체가 제1 컬럼(11)으로부터의 헤드 가스를 응축시킴으로써 형성되고, 다시 제1 컬럼(11)으로 유동 공급된다. 제1 컬럼(11)으로부터의 헤드 가스를 응축시키기 위해, 액체 냉각 유동이 제공되고, 헤드 가스와의 간접 열교환에서 증발되거나 부분적으로 증발되고, 냉각 스트림의 증발 또는 부분 증발 동안 형성된 기체는 제2 압력 범위 내의 압력으로 팽창되어 일이 수행되고, 제2 컬럼(12) 내로 공급된다. 본 발명은 또한 대응하는 시스템(100 내지 500)에 관한 것이다.

Cryogenic distillation system for air separation

본 발명에 따르면, 공기는 고압 증류탑(101)과, 중압 증류탑(102), 그리고 저압 증류탑(103)을 포함하는 3중 증류탑에서 분리된다. 아르곤 농후 액체는 저압 증류탑으로부터 아르곤 증류탑에 공급된다. 95 mol% 이상의 산소를 함유하는 산소 농후 유체는 아르곤 증류탑으로부터 인출되고 저압 증류탑으로부터는 선택적으로 인출된다. According to the invention, the air is separated in a triple distillation column comprising a high pressure distillation column 101, a medium pressure distillation column 102, and a low pressure distillation column 103. The argon rich liquid is fed from the low pressure column to the argon column. An oxygen rich fluid containing at least 95 mol% oxygen is withdrawn from the argon distillation column and selectively withdrawn from the low pressure column.

Method for preparing superpure nitrogen

本发明涉及一种通过具有至少一个蒸馏塔的空分装置制备超纯氮的方法，其中将来自于压力塔上部或液态氮储罐的无氧压缩氮馏份减压输入到在其底部被加热的低压塔中，由此在所述低压塔中形成上升的蒸汽，并借助于在该低压塔顶部用超纯氮进行的回流脱除一氧化碳，在所述低压塔的顶部抽出不含一氧化碳的顶部气体，然后在压力提高之后被部分液化，该已液化的部分减压进入在其底部被加热的He-Ne-H 2 塔中，从该塔液态地取出超纯氮。本发明还涉及用于实施上述方法的设备。

Method and device for the cryogenic decomposition of air

该方法和设备用于在用于氮氧分离的蒸馏塔系统中低温分离空气，该蒸馏塔系统包括第一高压塔(23)和低压塔(25，26)以及三个冷凝器-蒸发器，即高压塔-塔顶冷凝器(27)、低压塔-塔底蒸发器(28)和辅助冷凝器(29；228)。将第一进料空气流在主热交换器(20，21)中冷却。将经冷却的第一进料空气流(22)在第一压力下导入第一高压塔(23)中。在高压塔-塔顶冷凝器(27)中使来自第一高压塔(23)的气态塔顶氮气(44，45)冷凝。将在高压塔-塔顶冷凝器(27)中冷凝的塔顶氮气(46)的至少一部分(47)作为回流液体送至第一高压塔(23)。低压塔(25，26)的塔底液体(66)的一部分在低压塔-塔底蒸发器(28)中通过与冷凝的加热流体(58)的间接热交换而蒸发。低压塔(25，26)的塔底液体(66)的未蒸发的部分(67)在辅助冷凝器(29；228)中至少部分地蒸发。在辅助冷凝器(29；228)中蒸发的液体(68)的至少一部分作为气态氧气产品(69)获得。该用于氮氧分离的蒸馏塔系统此外还包括第二高压塔(24)。将第二进料空气流(35)在主热交换器(20，21)中冷却，随后在高于第一压力的第二压力下导入第二高压塔(24)中。将第二高压塔(24)的塔顶气体(58)的至少一部分在低压塔-塔底蒸发器(28)中用作加热流体。

Nitrogen production method and nitrogen production apparatus

액체 질소를 제조하기 위한, 질소 회수율이 높고, 에너지 효율이 높은 질소 제조 방법 및 질소 제조 장치를 제공한다. 원료 공기의 일부를, 주 열교환기(1)의 전단에서 팽창시켜서 냉각하고, 팽창되지 않은 나머지 원료 공기를 주 열교환기(1) 내부에서 예랭하기 위한 한랭으로서 이용한다. 또한, 주 열교환기(1) 내부에서 예랭된 원료 공기의 일부를 주 열교환기(1) 외부로 취출하여 팽창시켜서 냉각하고, 팽창되지 않은 나머지 예랭된 원료 공기를 주 열교환기(1) 내부에서 냉각하기 위한 한랭으로서 이용한다.

System and method utilizing refinery dry gas

本发明的利用炼厂干气的系统及方法，其中，利用炼厂干气的系统包括：一级板翅换热器、气液分离器、第一精馏塔、第二精馏塔、二级板翅换热器、第三精馏塔、第四精馏塔、第一制冷系统、第二制冷系统、第三制冷系统。利用炼厂干气的方法包括：对炼厂干气降温；对降温后的炼厂干气进行初步分离处理；对第一液相流进行精分离处理；对第二液相流进行精分离处理；对第一气相流、第二气相流降温；本发明的技术方案通过采用不同温区的制冷剂分别循环制冷，并优化多组分的分离序列，从而达到对炼厂干气中的各组分分类提取、分别利用的效果，实现资源的充分利用，同时又尽可能使投资和操作费用降低，提高经济性。

Nitrogen production method and nitrogen production apparatus

提供一种用于制造液氮的、氮回收率高且能量效率高的氮制造方法和氮制造装置。将原料空气的一部分在主热交换器(1)的前段膨胀并冷却，将没有膨胀的剩余原料空气作为用于在主热交换器(1)内部预冷的寒冷利用。另外，将主热交换器(1)内部预冷了的原料空气的一部分向主热交换器(1)外部取出使其膨胀并冷却，将没有膨胀的剩余的预冷了的原料空气作为用于在主热交换器(1)内部冷却的寒冷利用。

Nitrogen and methane separation process by cryogenic distillation

Titre : Procédé de séparation d’azote et de méthane par distillation cryogénique Un procédé de séparation d’azote et de méthane par distillation cryogénique, le mélange à séparer (1) contenant de l’azote, du méthane et au moins un des contaminants benzène, toluène et xylène comprend une étape de lavage (K0) avec un liquide enrichi en méthane (25) pour enlever l’au moins un contaminant choisi dans le groupe benzène, toluène et xylène en amont de l’étape de distillation cryogénique. Figure unique Title: Process for the separation of nitrogen and methane by cryogenic distillation A process for the separation of nitrogen and methane by cryogenic distillation, the mixture to be separated (1) containing nitrogen, methane and at least one of the contaminants benzene , toluene and xylene comprises a washing stage (K0) with a liquid enriched in methane (25) to remove the at least one contaminant chosen from the benzene, toluene and xylene group upstream of the cryogenic distillation stage. single figure

Cryogenic distillation procedure and plant for air separation uses four columns and heaters to separate different fractions

The procedure consists of delivering a purified and cooled air flow (5B) to a first column (K01) operating at high pressure to separate it into primary oxygen-rich (15) and nitrogen-rich flows. At least part of the oxygen-rich flow is fed to a second intermediate-pressure column (K04) to produce secondary oxygen-rich (27) and nitrogen-rich (37) flows. At least part of the flows are fed to a third low-pressure column (K02), to which a nitrogen-rich liquid from the first column is also delivered. The second and third column vessels are heated by boilers (E05, E02), and an argon-rich fluid is passed from the third column to a fourth column (K10), where it is separated to form an argon-rich flow (45) at the head of the column and an oxygen-rich flow (41) in the column vessel, both of which are drawn off. The vessel of the fourth column is heated by a third boiler (E11) using nitrogen-rich gas (35) from the third column.

METHOD AND APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION

METHOD AND APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION

Dans un procédé de séparation d'air par distillation cryogénique dans un ensemble de colonnes comprenant une première colonne opérant à une première pression (21), une deuxième colonne (23) opérant à une deuxième pression inférieure à la première pression et une troisième colonne (25) opérant à une troisième pression inférieure à la deuxième pression, la troisième colonne comprend un premier et un deuxième vaporiseur-condenseur (29, 31) et de l'azote provenant d'un compresseur froid (47) est envoyé à un des vaporiseur-condenseurs. In a method of separating air by cryogenic distillation in a set of columns comprising a first column operating at a first pressure (21), a second column (23) operating at a second pressure lower than the first pressure and a third column ( 25) operating at a third pressure lower than the second pressure, the third column comprises a first and a second vaporizer-condenser (29, 31) and nitrogen from a cold compressor (47) is sent to one of the vaporizer -condenseurs.

Purification of carbon dioxide

In a process for separating at least one "heavy" impurity such as hydrogen sulfide from crude carbon dioxide comprising significant quantities of at least one "light" impurity such as non-condensable gases, involving at least one heat pump cycle using carbon dioxide-containing fluid from the process as the working fluid, the "light" impurity is removed from the crude carbon dioxide and carbon dioxide is subsequently recovered from the removed "light" impurity, thereby improving overall carbon dioxide recovery and efficiency in terms of energy consumption.

Cryogenic distillation system for air separation.

Low temperature distillation plant for air separation

Cryogenic distillation system for air separation.

Production of ultrapure nitrogen includes drawing oxygen-free pressurized nitrogen fraction from an upper portion of the pressure column liquid and releasing in the low pressure column

The oxygen-free pressurized nitrogen fraction is released into the low pressure column which is heated in its sump. In the low pressure column, raising vapors form and by means of a cycle ultrapure nitrogen from carbon monoxide is released at the top of the low pressure column, carbon monoxide-free head-gas is removed at the top of the low pressure column and partially liquefied at raised pressure. The liquefied portion is released in He-Ne-He-column which is heated in its sump, and the ultrapure nitrogen is removed as liquid. The oxygen-free pressurized nitrogen fraction is drawn either from an upper portion of the pressure column liquid or ready in a liquid tank with stored oxygen-free nitrogen. Process for producing ultrapure nitrogen is by means of low temperature analysis of air in a rectifying system having a rectifying column where compressed; passing purified air into a pressure column from which oxygen-free nitrogen pressure fraction is produced; passing the fraction into a low pressure column and producing as head gas carbon monoxide free low pressure nitrogen in the low pressure column.

Process and apparatus for the separation of air by cryogenic distillation

A process for the cryogenic separation of air using a multiple column distillation system comprising at least a higher pressure column ("HP column") and a lower pressure column ("LP column"), comprising: feeding cooled feed air to the high pressure column for separation into high pressure nitrogen-enriched overhead vapor and crude liquid oxygen; feeding at least one low pressure column feed stream comprising nitrogen and oxygen to the low pressure column for separation into nitrogen-rich overhead vapor and liquid oxygen; refluxing the low pressure column with a liquid stream from or derived from the high pressure column; feeding expanded air to an auxiliary separation column for separation into auxiliary column nitrogen-rich overhead vapor and oxygen-rich liquid and removing the nitrogen rich overhead vapour as a product stream; feeding bottom liquid from the auxiliary column to an intermediate location of the low pressure column;and refluxing the auxiliary column with a nitrogen rich liquid stream from or derived from the HP column.

Treatment of nitrogen-rich natural gas streams

Process and apparatus for the separation of air by cryogenic distillation

在一种通过低温蒸馏来分离空气的方法中，空气被净化、冷却并输送到塔系统（ASU）的第一蒸馏塔（100），在所述第一蒸馏塔中，空气被分离成氧增浓液体（10）和氮增浓气体，氧增浓液体或从其衍生的液体从第一塔被输送到在比第一塔的压力低的压力下工作的第二塔（102）的顶部冷凝器（107）并被部分地气化，第二塔的底部经由底部再沸器（106）加温，来自第二塔的底部的液体被输送到在比第二塔的压力低的压力下工作的第三塔（103）的中间位置，来自第二塔的顶部的氮增浓液体被输送到第三塔的顶部，富氧液体从第三塔的底部被取出、加压并通过与空气换热而气化，并且来自第二塔的顶部冷凝器的氧增浓液体被输送到第二塔的中间位置以在其中进行分离。

Air separation method and air separation apparatus

Cryogenic distillation system for air separation

Process for separating air by cryogenic distillation and apparatus including a high pressure column, an intermediate pressure column, a low pressure column having a bottom reboiler and an argon column having a top condenser, a conduit for sending air to the high pressure column, a conduit for sending at least part of a first oxygen enriched liquid from the high pressure column to the intermediate pressure column, a conduit for sending a second oxygen enriched fluid from the bottom of the intermediate pressure column to the low pressure column, a conduit for sending a second nitrogen enriched fluid from the top of the intermediate pressure column to the low pressure column or to a top condenser of the argon column, a conduit for sending a heating gas to the bottom reboiler of the low pressure column, a conduit for removing a third oxygen enriched fluid from the low pressure column, a conduit for sending a nitrogen enriched liquid from the high pressure column to the low pressure column, a conduit for sending a first argon enriched stream from the low pressure column to the argon column, a conduit for withdrawing a second argon enriched stream containing at least 50% argon from the argon column and a conduit for withdrawing a fourth oxygen enriched stream from the argon column by liquid from the bottom reboiler.

Cryogenic distillation system for air separation

Method and device for separating air by cryogenic distillation

The invention relates to a method for separating air by cryogenic distillation in a set of columns including a first column operating at a first pressure (21), a second column (23) operating at a second pressure which is lower than the first pressure and a third column (25) operating at a third pressure which is lower than the second pressure, wherein the third column includes first and second evaporator-condensers (29, 31) and nitrogen from a cold compressor (47) is sent to one of the evaporator-condensers.

Recovery of helium from nitrogen-rich streams

Overall power consumption in a cryogenic distillation process for recovering helium from nitrogen-rich gases comprising helium may be reduced if the feed to the distillation column system is at least substantially condensed by indirect heat exchange against a first bottoms liquid at first pressure, and a second bottoms liquid at a second pressure that is different from the first pressure.

Manufacture of argon

Cryogenic distillation system for air separation

Air is sent to a triple column comprising a high pressure column (101), an intermediate pressure column (102) and a low pressure column (103). The intermediate pressure column is fed with oxygen enriched liquid (10) from the high pressure column. Argon enriched liquid (33,41) is sent to an argon column (104) from the low pressure column. The top condenser (27) of the argon column is cooled using nitrogen enriched liquid (25A,81) from the top of the high, low or intermediate pressure column or the bottom reboiler of the argon column.

Cryogenic distillation plant for air separation

Production of nitrogen

Nitrogen is produced by separation of it from air. Nitrogen so separated is condensed. Most or all of the nitrogen is separated by rectification. At least some of the condensed nitrogen is employed as reflux in the rectification. The nitrogen is both separated and condensed at three or more different pressures. For example, air separated in an arrangement of rectification columns comprising a double rectification column 14 (itself comprising a higher pressure column 16 and a lower pressure column 18) and an auxiliary rectification column 22. Nitrogen separated in the column 16 is condensed in condenser -reboiler 20; nitrogen separated in the column 18 is condensed in condenser 24, and nitrogen separated in the column 22 is condensed in condenser 26.

Nitrogen and methane separation process by cryogenic distillation

Titre : Procédé de séparation d’azote et de méthane par distillation cryogénique Un procédé de séparation d’azote et de méthane par distillation cryogénique, le mélange à séparer (1) contenant de l’azote, du méthane et au moins un des contaminants benzène, toluène et xylène comprend une étape de lavage (K0) avec un liquide enrichi en méthane (25) pour enlever l’au moins un contaminant choisi dans le groupe benzène, toluène et xylène en amont de l’étape de distillation cryogénique. Figure unique Title: Process for the separation of nitrogen and methane by cryogenic distillation A process for the separation of nitrogen and methane by cryogenic distillation, the mixture to be separated (1) containing nitrogen, methane and at least one of the contaminants benzene , toluene and xylene comprises a washing stage (K0) with a liquid enriched in methane (25) to remove the at least one contaminant chosen from the benzene, toluene and xylene group upstream of the cryogenic distillation stage. single figure

Air separation with medium pressure enrichment

A cryogenic air separation process is disclosed wherein the low pressure column section of a doubler is caused to operate closer to equilibrium and, hence, more efficiently by incorporating a medium pressure column which further enriches HP column enriched oxygen liquid before introduction into the LP column. The MP column is reboiled by indirect heat exchange with condensing HP column nitrogen, and is refluxed by direct injection of condensed nitrogen. A second improvement to cryogenic air separation is disclosed which can be advantageously combined with the above improvement, in which pressurized oxygen up to 10 ATA is efficiently produced from pumped LOX by using the pumped LOX to reflux an auxiliary higher pressure column in which a fraction of the supply air compressed to higher pressure is separated into liquid N 2 which is subsequently used as reflux and into oxygen enriched liquid which is further separated.

Enhanced nitrogen removal in an lng facility

AN LNG FACILITY EMPLOYING AN ENHANCED NITROGEN REMOVAL SYSTEM THAT CONCENTRATES THE AMOUNT OF NITROGEN IN THE FEED STREAM TO A NITROGEN REMOVAL UNIT (NRU) TO THEREBY INCREASE THE SEPARATION EFFICIENCY OF THE NRU.IN ONE EMBODIMENT, THE NITROGEN REMOVAL SYSTEM COMPRISES A MULTISTAGE SEPARATION VESSEL OPERABLE TO SEPARATE NITROGEN FROM A COOLED NATURAL GAS STREAM.AT LEAST A PORTION OF THE RESULTING NITROGEN-CONTAINING STREAM EXITING THE MULTISTAGE SEPARATION VESSEL CAN BE USED AS A REFRIGERANT, PROCESSED TO A NITROGEN REMOVAL UNIT, AND/OR UTILIZED AS FUEL GAS FOR THE LNG FACILITY.

A kind of natural gas liquefaction and lighter hydrocarbons isolation integral integrated technique system and technique

本发明公开一种天然气液化与轻烃分离一体化集成工艺系统及工艺，该工艺包括：天然气经预冷后气液两相从主换热冷箱抽出进入洗涤塔，塔顶气相进入主换热冷箱进行冷却，再经洗涤塔回流罐进行气液分离，液相送入洗涤塔为洗涤塔提供冷回流，气相则返回主换热冷箱液化段；洗涤塔塔底流股经节流减压后进入脱乙烷塔，脱乙烷塔塔顶气相进入主换热冷箱预冷段冷却，再经脱乙烷塔回流罐进行气液分离，低温液相乙烷一方面为脱乙烷塔提供冷回流，一方面将部分采出作为乙烷冷剂储存，余下部分通过泵加压送至主换热冷箱液化段；丙烷和丁烷分别经丙烷泵和丁烷泵增压，混合后送至冷箱，经预冷后抽出，节流后并入甲烷和乙烷流股，再返回主换热冷箱一同液化生产LNG。

Method and device for separating air by cryogenic distillation

The invention relates to a method for separating air by cryogenic distillation in a set of columns including a first column operating at a first pressure (21), a second column (23) operating at a second pressure which is lower than the first pressure and a third column (25) operating at a third pressure which is lower than the second pressure, wherein the third column includes first and second evaporator-condensers (29, 31) and nitrogen from a cold compressor (47) is sent to one of the evaporator-condensers.

Cryogenic distillation system for air separation

Air is separated in a triple column system comprising a high pressure column (101), an intermediate pressure column (102) and a low pressure column (103). An argon enriched liquid from the low pressure column feeds an argon column (104). Oxygen enriched fluids containing at least 95mol.% oxygen are removed from the argon column and optionally from the low pressure column.

Low temperature rectification system for air separation

Hydraulically balanced fully thermally coupled system

A fully thermally coupled distillation structure designed to overcome hydraulic limitations in the past has been revealed for separating a multi-component feed stream into three product streams. The fractionation apparatus is equipped with at least one condenser and one reboiler to provide fractionation efficiency surpassing the PETLYUK system. Further, the fractionation apparatus includes innovative designs to enable hydraulically balanced and energy efficient operation at various feed rates, compositions and product specifications.

Two stage rectification process for separating a mixture of ethane, ethylene and acetylene

Process and apparatus for the separation of air by cryogenic distillation

In a process for the production of nitrogen and of oxygen enriched liquid by separation of air by cryogenic distillation, a first stream of air is sent to an exchanger to form a first cooled air stream, the first cooled air stream is sent to a bottom reboiler of a column, condensed air is sent from the bottom reboiler to a top condenser of the column, vaporized air is sent from the top condenser to a first compressor, air is sent from the first compressor to the column, air is sent to a second compressor and from the second compressor to the exchanger to produce a cooled second air stream, the cooled second air stream is sent to a first turboexpander and from the turbo expander to the column, bottom liquid is removed from the column and gaseous nitrogen is removed from the top of the column.

Process for the production of oxygen and nitrogen

A process for the production of oxygen and nitrogen is applicable when the oxygen product is withdrawn from a distillation column system as a liquid, pumped to an elevated pressure and warmed at least in part by cooling a suitably pressurized stream. At least a portion of the compressed, purified, and cooled air is introduced to a first of at least three distillation columns. The first distillation column contains at least a condenser at its top, produces at least an oxygen-lean stream from or near its top and a first oxygen-enriched liquid from its bottom. A second distillation column, which contains a reboiler in its bottom, has no condenser, receives at least a portion of nitrogen-enriched liquid as a feed to its top, and produces a first nitrogen-rich vapor stream from its top and a second oxygen-enriched liquid from its bottom. A third distillation column, which contains a reboiler in its bottom, has no condenser, receives at least a portion of nitrogen-enriched liquid as a feed to its top, receives at least said second oxygen-enriched liquid as a feed, and produces a second nitrogen-rich vapor from its top and a liquid oxygen-rich stream from its bottom. The liquid oxygen-rich stream from said third distillation column is elevated in pressure and warmed, at least in part, by indirect heat exchange with a pressurized stream having a nitrogen content greater than or equal to that in the feed air, said pressurized stream being cooled without being subjected to distillation. The second distillation column receives as a feed at least one of (a) a portion of said first oxygen-enriched stream from said first distillation column; or (b) a portion of said cooled pressurized stream. The third distillation column receives as a feed at least one of (a) a portion of said first oxygen-enriched stream from said first distillation column; or (b) a portion of said cooled pressurized stream. In the preferred mode of operation, the first distillation column is at the highest ...

METHOD AND APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION

Cryogenic distillation system for air separation

본 발명에 따르면, 공기는 고압 증류탑(101)과, 중압 증류탑(102), 그리고 저압 증류탑(103)을 포함하는 3중 증류탑에서 분리되며, 상기 중압 증류탑에는 고압 증류탑으로부터 산소 농후 액체가 공급된다. 저압 증류탑은 아르곤 증류탑(104)에 아르곤 농후 액체를 공급하며, 아르곤 증류탑보다 높은 압력에서 작동한다. 기체를 저부의 리보일러(23)에 이송함으로써 아르곤 증류탑의 저부에 열이 공급된다. 상기 기체는 질소 농후 기체인 것이 바람직하며, 저압 증류탑의 탑정으로부터 인출될 수도 있다.

Method for preparing superpure nitrogen

本发明涉及一种通过具有至少一个蒸馏塔的空分装置制备超纯氮的方法,其中将来自于压力塔上部或液态氮储罐的无氧压缩氮馏份减压输入到在其槽中加热的低压塔中,由此在所述低压塔中形成上升的蒸汽,并借助于在该低压塔顶部用超纯氮进行的回流脱除一氧化碳,在所述低压塔的顶部抽出不含一氧化碳的顶部气体,然后在压力提高之后被部分液化,该已液化的部分减压进入在其槽中加热的He－Ne－H 2 －塔中,从该塔液态地取出超纯氮。

Process to separate natural gas liquids from nitrogen- containing natural gas

Process to Separate Natural Gas Liquids From Nitrogen-Containing Natural Gas A process which effectively separate and recovers natural gas liquids from a natural gas stream containing nitrogen, regardless of the magnitude of the nitrogen concentration or changes in the nitrogen concentration.

Nitrogen production method and nitrogen production apparatus

A portion of feed air is expanded and cooled in front of a main heat exchanger, and is used as cold for precooling the remaining unexpanded feed air inside the main heat exchanger. A portion of the feed air precooled inside the main heat exchanger is removed to outside the main heat exchanger, expanded and cooled, and used as cold to cool the remaining unexpanded precooled feed air inside the main heat exchanger.

FOERFARANDE FOER ATT SEPARERA NATURGASVAETSKOR.

Treatment of nitrogen-rich natural gas streams

Helium can be recovered from nitrogen-rich natural gas at high pressure with low helium loss by cryogenic distillation of the natural gas after pre-treatment of the gas to remove incompatible impurities and then recovery of natural gas liquid (NGL) from the pre-treated gas by distillation. Overall power consumption may be reduced, particularly if the feed to the helium recovery column system is at least substantially condensed by indirect heat exchange against a first portion of nitrogen-enriched bottoms liquid at first pressure, and a second portion of nitrogen-enriched bottoms liquid at a second pressure that is different from the first pressure.

Process for the production of oxygen and nitrogen

Method and apparatus for the cryogenic separation of air

本发明涉及一种低温分离空气的方法，其中使用具有塔系统(10)的空气分离设备(100‑500)，所述塔系统具有第一塔(11)、第二塔(12)、第三塔(13)和第四塔(14)，其中从所述第一塔(11)出来的流体至少被送进所述第二塔(12)中，从所述第二塔(12)出来的流体至少被送进所述第三塔(13)中，从所述第三塔(13)出来的流体至少被送进所述第四塔(14)中以及从所述第四塔(14)出来的流体至少送进所述第三塔(13)中，并且从所述第三塔(13)出来被送进所述第四塔(14)中的流体包含至少一部分侧流，从所述第三塔(13)中取出与所述第三塔底液体相比具有更低氧含量和更高氩含量的所述侧流。提供了通过使所述第一塔(11)的塔顶气体冷凝形成回流液体且所述回流液体以液体形式返回到所述第一塔(11)。为了使所述第一塔(11)的塔顶气体冷凝，提供液体冷却流并且使液体冷却流在与所述塔顶气体的间接热交换中蒸发或部分蒸发，以及使在所述冷却流蒸发或部分蒸发过程中形成的气体对外做功地膨胀直至达到在所述第二压力范围内的压力并被送进所述第二塔(12)中。本发明的主题还涉及一种对应的设备(100‑500)。

Production of Argon

A first stream of argon-enriched oxygen is separated in a first rectification column 4 so far as to form oxygen vapour further enriched in argon, a second stream of argon-enriched oxygen is introduced into a second rectification column 6 operating at a lower pressure than the first rectification column 4. A vapour flow upwardly through the second rectification column 6 is created by reboiling in reboiler-condense 44 liquid separated therein. The further-enriched oxygen vapour is condensed in the reboiler-condenser 44 by indirect heat exchange with said separated liquid. One stream of the condensed further-enriched oxygen vapour is employed as reflux in the first rectification column 4. A third argon-enriched oxygen stream is introduced in liquid state into an intermediate mass exchange region of the second rectification column 6. An argon product is separated in the second rectification column. The argon concentration of the third stream is greater than that of the second stream but less than that of the argon product, and the third stream is taken from the condensed further-enriched oxygen vapour or from other liquid in the first rectification column 4.

Air separation

通过进口2将空气导入到高压精馏塔8中。通过出口14将富氧液流从高压精馏塔8导出。一部分富氧液流通过进口28导入到低压精馏塔10中。这部分液流在塔10中被分离成氧和氮。

Method and device for separating air by cryogenic distillation

本发明涉及一种在包括在第一压力下运行的第一塔(21)、在低于第一压力的第二压力下运行的第二塔(23)和在低于第二压力的第三压力下运行的第三塔(25)的一组塔中通过低温蒸馏分离空气的方法，其中第三塔包括第一和第二蒸发器-冷凝器(29,31)并将来自冷压缩机(47)的氮气送往蒸发器-冷凝器之一。

METHOD AND APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION

Un procédé comprend un premier ensemble de colonnes de distillation (1) et un deuxième ensemble de colonnes de distillation (2), une colonne basse pression (5) du premier ensemble étant reliée à une colonne opérant à pression plus élevée (3') du deuxième ensemble au moyen d'un gaz (15) arrivant de la tête de la colonne opérant à une pression plus élevée et/ou au moyen d'un fluide (17) arrivant de la colonne basse pression. A method comprises a first set of distillation columns (1) and a second set of distillation columns (2), a low pressure column (5) of the first set being connected to a column operating at higher pressure (3 ') of the second assembly by means of a gas (15) arriving from the head of the column operating at a higher pressure and / or by means of a fluid (17) arriving from the low pressure column.

Process and apparatus for the separation of air by cryogenic distillation

A process for the cryogenic separation of air using a multiple column distillation system comprising at least a higher pressure column ("HP column") and a lower pressure column ("LP column"), comprising: feeding cooled feed air to the high pressure column for separation into high pressure nitrogen-enriched overhead vapor and crude liquid oxygen; feeding at least one low pressure column feed stream comprising nitrogen and oxygen to the low pressure column for separation into nitrogen-rich overhead vapor and liquid oxygen; refluxing the low pressure column with a liquid stream from or derived from the high pressure column; feeding expanded air to an auxiliary separation column for separation into auxiliary column nitrogen-rich overhead vapor and oxygen-rich liquid and removing the nitrogen rich overhead vapour as a product stream; feeding bottom liquid from the auxiliary column to an intermediate location of the low pressure column;and refluxing the auxiliary column with a nitrogen rich liquid stream from or derived from the HP column.

Patent IN190870B

Production of Argon

A first stream of argon-enriched oxygen is separated in a first rectification column 4 so far as to form oxygen vapour further enriched in argon, a second stream of argon-enriched oxygen is introduced into a second rectification column 6 operating at a lower pressure than the first rectification column 4. A vapour flow upwardly through the second rectification column 6 is created by reboiling in reboiler-condense 44 liquid separated therein. The further-enriched oxygen vapour is condensed in the reboiler-condenser 44 by indirect heat exchange with said separated liquid. One stream of the condensed further-enriched oxygen vapour is employed as reflux in the first rectification column 4. A third argon-enriched oxygen stream is introduced in liquid state into an intermediate mass exchange region of the second rectification column 6. An argon product is separated in the second rectification column. The argon concentration of the third stream is greater than that of the second stream but less than that of the argon product, and the third stream is taken from the condensed further-enriched oxygen vapour or from other liquid in the first rectification column 4.

Method for cryogenic separation of air in distillation column system for nitrogen-oxygen separation, involves using portion of overhead gas of high pressure column as heating fluid in low pressure column bottom reboiler

A non-vaporized portion (67) of bottom liquid (29) of the low pressure columns (25,26) of a sub-capacitor is partially vaporized. The portion of the vaporized fluid in the sub-capacitor is recovered as a gaseous oxygen product (69). The feeding air stream (35) in the main heat exchangers (20,21) is cooled, and is supplied into a high pressure column (24) by initiating second pressure which is higher than the first pressure. The portion of the overhead gas (58) of the high pressure column is used as a heating fluid in a low pressure column bottom reboiler (28). An independent claim is included for a device for cryogenic separation of air in distillation column system for nitrogen-oxygen separation.

Air separation

空気分離装置、および空気分離方法

本発明は、空気を低温で蒸留する空気分離装置において、高圧の原料空気を高圧窒素ガスと高圧酸素富化液化空気とに分離する高圧塔、高圧酸素富化液化空気を低圧窒素ガスと低圧液化酸素とアルゴン富化液化酸素とに分離する低圧塔、低圧塔の圧力よりも高い圧力のアルゴン富化液化酸素をアルゴンガスと中圧液化酸素とに分離するアルゴン塔、アルゴンガスと低圧液化酸素とを熱交換する第１の間接熱交換器、高圧窒素ガスと中圧液化酸素とを熱交換する第２の間接熱交換器、第１の間接熱交換器で気化した低圧酸素ガスと気化しなかった低圧液化酸素とを分離する第１の気液分離室、第２の間接熱交換器で気化した中圧酸素ガスと気化しなかった中圧液化酸素とを分離する第２の気液分離室、低圧塔の気相部と第２の気液分離室の気相部とを連通する第１の経路、低圧塔の液相部と第２の気液分離室とを連通する第２の経路、第１の経路に位置する第１の開閉機構、及び、第２の経路に位置する第２の開閉機構、を備える。

Verfahren zur herstellung von sauerstoff und stickstoff

Verfahren zur gewinnung von ultrareinem stickstoff

贫氦天然气提氦并联产多产品的系统及方法

一种贫氦天然气提氦并联产多产品的系统及方法。该系统包括：一级制冷装置（11）、一级低温分离器（9）、预脱氮塔（26）、脱甲烷塔（51）、二级制冷装置（72）、提氦塔（75）和脱氮塔（98）等。按组分的沸点由低到高的顺序对氮气、甲烷、乙烷和丙烷进行精馏分离，利用预脱氮塔（26）进行氮气与甲烷的分离，利用低温精馏实现氮气与氦气的分离。

Tieftemperaturrektifikationsystem zur luftzerleggung

Tieftemperaturdestilationsanlage zur luftzerlegung

Solvent injection and recovery in a lng plant

Implementations described and claimed herein provide systems and methods for processing liquefied natural gas (LNG). In one implementation, a solvent is injected into a feed of natural gas at a solvent injection point. A mixed feed is produced from a dispersal of the solvent into the feed of natural gas. The mixed feed contains heavy components. A chilled feed is produced by chilling the mixed feed. The chilled feed includes a vapor and a condensed liquid. The condensed liquid contains a fouling portion of the heavy components condensed by the solvent during chilling. The liquid containing the fouling portion of the heavy components is separated from the vapor. The vapor is directed into a feed chiller heat exchanger following separation of the liquid containing the fouling portion of the heavy components from the vapor, such that the vapor being directed into feed chiller heat exchanger is free of freezing components.

一种氪氙精制工艺中循环利用氮气的方法及其装置

本发明涉及一种氪氙精制工艺中循环利用氮气的方法，所述氪氙精制工艺采用液氮作为冷源，各冷凝蒸发器排出的氮气均进行循环利用，循环利用的氮气分为常温氮气和低温氮气；其中，将从一级冷凝蒸发器排出的汽化氮气作为低温氮气，将从其余冷凝蒸发器排出的氮气经汇总并通过主换热器复热后作为常温氮气；本发明还涉及一种应用于上述方法中的装置，其包括各精馏塔、各冷凝蒸发器、主换热器、循环压缩机以及连接管道。与现有技术相比，本发明采用液氮和氮气的混合气作为冷源，可稳定的维持各冷凝蒸发器的操作温度，保证精馏的顺利的进行；通过对氮气的回收循环利用，氪氙精制工艺中的液氮或氮气消耗量会大幅度降低，从而降低了能耗和生产成本。

High pressure oxygen pumped lox rectifier

贫氦天然气提氦并联产多产品的系统及方法

本发明公开了一种贫氦天然气提氦并联产多产品的系统及方法。该系统包括：一级制冷装置、一级低温分离器、预脱氮塔、脱甲烷塔、二级制冷装置、提氦塔和脱氮塔等。本发明的系统及方法按组分的沸点由低到高的顺序依次对氮气、甲烷、乙烷和丙烷进行精馏分离，利用预脱氮塔进行氮气与甲烷的分离，塔顶气中氦气浓度可浓缩三十倍左右，同时控制塔顶气中二氧化碳的含量低于50ppm；利用低温精馏实现氮气与氦气的分离。实现天然气中氦气含量在200‑3000ppm的经济有效回收，乙烷的回收率和氦气的回收率均可达到99mol％以上，同时副产LNG、液化石油气和轻烃等，同时副产的低温氮气可提供‑184℃左右温位的冷量，大幅度提高了经济效益。

Verfahren und Vorrichtung zur Erzeugung einer hoch reinen Luftkomponente

Das Verfahren und die Vorrichtung dienen zur Erzeugung einer hoch reinen Luftkomponente aus einem weniger reinen Vorprodukt in einem Destilliersäulen-System, das mindestens eine erste Trennsäule (5) aufweist. Ein Strom (4) eines weniger reinen Vorprodukts wird in die erste Trennsäule (5) eingeleitet. Der Trennsäule (5) wird ein hoch reines Produkt (8) entnommen. Das Destilliersäulen-System umfasst außerdem einen ersten Kondensator-Verdampfer (6) und einen zweiten Kondensator-Verdampfer (7), die jeweils einen Verflüssigungsraum und einen Verdampfungsraum aufweisen. Im Verflüssigungsraum des ersten Kondensator-Verdampfers (6) wird Rücklaufflüssigkeit (26) für die oder eine der Trennsäulen (5) und im Verdampfungsraum des zweiten Kondensator-Verdampfers (7) wird aufsteigender Dampf für die oder eine der Trennsäulen (5) erzeugt. In einem Kreislauf-System wird ein Wärmeaustausch-Fluid in einem Verdichter (12) verdichtet, in dem Verflüssigungsraum des zweiten Kondensator-Verdampfers (7) kondensiert, entspannt (19), im Verdampfungsraum des ersten Kondensator-Verdampfers (6) verdampft und schließlich wieder dem Verdichter (12) zugeleitet. Das Wärmeaustausch-Fluid weist einen Stickstoffgehalt von höchstens 95 Mol-% auf.

Tieftemperaturdestillationsanlage zur luftzerleggung

Produktion von hochreinem sauerstoff unter erhoehtem abgabedruck mit geringem energieverbrauch.

High pressure oxygen pumped lox rectifier

A process and apparatus for producing pressurized oxygen at up to about 10 ATA directly in a cryogenic distillation process without need of an oxygen compressor. The process as shown at (Fig 1), involves a split supply pressure air supply (HP AIR), wherein the elevated pressure fraction gasifies pumped liquid oxygen. An essential aspect of the invention is that its gasification takes place in an elevated pressure rectifier (22); thus the elevated pressure fraction of air is converted into partially separated liquids as opposed to the more wasteful conversion to liquid air which occurs in the conventional process. The improvement may be adapted to any cryogenic distillation configuration and be used to produce any purity of produce oxygen. A particularly high purity (99.55%) and low energy example is presented.

一种从含氦天然气提取轻烃及粗氦的系统

本实用新型公开了一种从含氦天然气提取轻烃及粗氦的系统，属于含氦天然气的轻烃提取与粗氦的提取技术领域，包括乙烷脱碳脱水系统，所述乙烷脱碳脱水系统分别与乙烷冷凝分离器和主换热器连通，所述乙烷冷凝分离器连通乙烷冷凝器，所述乙烷冷凝器与乙烷塔连通，所述乙烷冷凝分离器还与乙烷冷凝回流泵连通，从脱甲烷塔塔底的轻烃先复热，然后再去乙烷塔，乙烷冷凝器的冷源由脱甲烷塔下部的液体提供，可减少乙烷塔再沸器的负荷，节省用热。

Solvent injection and recovery in a LNG plant

Implementations described and claimed herein provide systems and methods for processing liquefied natural gas (LNG). In one implementation, a solvent is injected into a feed of natural gas at a solvent injection point. A mixed feed is produced from a dispersal of the solvent into the feed of natural gas. The mixed feed contains heavy components. A chilled feed is produced by chilling the mixed feed. The chilled feed includes a vapor and a condensed liquid. The condensed liquid contains a fouling portion of the heavy components condensed by the solvent during chilling. The liquid containing the fouling portion of the heavy components is separated from the vapor. The vapor is directed into a feed chiller heat exchanger following separation of the liquid containing the fouling portion of the heavy components from the vapor, such that the vapor being directed into feed chiller heat exchanger is free of freezing components.

Solvent injection and recovery in a lng plant

Implementations described and claimed herein provide systems and methods for processing liquefied natural gas (LNG). In one implementation, a solvent is injected into a feed of natural gas at a solvent injection point. A mixed feed is produced from a dispersal of the solvent into the feed of natural gas. The mixed feed contains heavy components. A chilled feed is produced by chilling the mixed feed. The chilled feed includes a vapor and a condensed liquid. The condensed liquid contains a fouling portion of the heavy components condensed by the solvent during chilling. The liquid containing the fouling portion of the heavy components is separated from the vapor. The vapor is directed into a feed chiller heat exchanger following separation of the liquid containing the fouling portion of the heavy components from the vapor, such that the vapor being directed into feed chiller heat exchanger is free of freezing components.

Method of and apparatus for separating argon and oxygen containing products from oxygen-enriched air

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Sposób i urządzenie do oddzielania argonu i tlenu z powietrza wzbogaconego w tlen

1 . Sposób oddzielania argonu i tlenu z powietrza wzbogaconego w tlen, w którym wytwarza sie strumien powietrza wzbogaconego w tlen w temperatu- rze odpowiedniej dla oddzielania go przez rektyfikacje, rozdziela sie strumien na tlen i azot w kolumnie rektyfikacyjnej o niskim cisnieniu, doprowadza sie wykropliny cieklego azotu do kolumny rektyfikacyjnej o niskim cisnieniu, wywoluje sie przeplyw do góry ponownie odparowanego tlenu przez kolumne rektyfikacyjna o niskim cisnieniu, wycofuje sie parowy strumien tlenu wzboga- conego w argon z posredniego obszaru przenikania masy kolumny rektyfika- cyjnej o niskim cisnieniu, przynajmniej czesciowo skrapla sie parowy strumien tlenu wzbogaconego w argon, redukuje sie cisnienie przynajmniej czesci skrop-- lonego strumienia wzbogaconego w argon, wprowadza sie otrzymany strumien o zredukowanym cisnieniu do posredniego obszaru wymiany masy w kolumnie argonowej, oraz oddziela sie od niego ciecz wzbogacona w argon i ciecz zuboz ona w argon, przy czym skraplanie strumienia tlenu wzbogaconego w argon przeprowadza sie poprzez posrednia wymiane ciepla z ciecza zubozona w ar- gon, oddzielona w kolumnie argonowej, znamienny tym , ze pozostala czesc skroplonego strumienia tlenu wzbogaconego w argon zawraca sie do rektyfika- cyjnej kolumny o niskim cisnieniu (10, 106) 9. Urzadzenie do oddzielania argonu i tlenu z powietrza wzbogaconego w tlen, zawierajace srodki do wytwarzania strumienia powietrza wzbogaco- nego w tlen w temperaturze odpowiedniej dla jego oddzielania przez rektyfi- kacje, kolumne rektyfikacyjna o niskim cisnieniu dla rozdzielania strumienia na tlen i azot, pierwszy skraplacz-reboiler dla dostarczania wykroplin cieklego azotu do kolumny rektyfikacyjnej o niskim cisnieniu, kanal dla przeplywu parowego strumienia wzbogaconego w argon z posredniego ob- szaru przenikania masy kolumny rektyfikacyjnej o niskim cisnieniu na po- sredni poziom przenikania masy kolumny argonowej dla oddzielania cieczy wzbogaconej w argon i cieczy ...

Separacion de aire.

SE INTRODUCE AIRE A TRAVES DE UNA ENTRADA 2 DENTRO DE UNA COLUMNA DE RECTIFICACION DE PRESION MAYOR 8. UNA CORRIENTE DE LIQUIDO ENRIQUECIDO CON OXIGENO SE RETIRA A TRAVES DE UNA SALIDA 14 DE LA COLUMNA DE RECTIFICACION DE MAYOR PRESION 8. UNA PARTE DE ESTA CORRIENTE SE INTRODUCE DENTRO DE UNA COLUMNA DE RECTIFICACION DE BAJA PRESION 10 A TRAVES DE UNA ENTRADA 28. LA CORRIENTE SE SEPARA EN LA COLUMNA 10 EN OXIGENO Y NITROGENO. ADEMAS, UNA CORRIENTE ENRIQUECIDA CON ARGON ES RETIRADA DE LA COLUMNA 10 A TRAVES DE UNA SALIDA 40, Y SE CONDENSA AL MENOS PARCIALMENTE EN UN A CALDERA-CONDENDASOR 42 QUE VUELVE A HERVIR EL OXIGENO SEPARADO EN UNA COLUMNA DE ARGON 22. RESULTANDO UNA PARTE DE ESTOS AL MENOS PARCIALMENTE UNA CORRIENTE DE OXIGENO ENRIQUECIDA CON ARGON PARCIALMENTE CONDENSADOR SE REDUCE EN PRESION PASANDO A TRAVES DE UNA VALVULA 44 Y SE INTRODUCE A TRAVES DE UN ENTRADA 46 DENTRO DE UNA REGION DE INTERCAMBIO DE MASA INTERMEDIA DE LA COLUMNA DE ARGON EN LA QUE SE SEPARA DENTRO EL ARGON Y ELOXIGENO. OTRA PARTE DE AL MENOS LA CORRIENTE DE OXIGENO ENRIQUECIDA CON ARGON PARCIALMENTE CONDENSADO ES DEVUELTA POR UNA BOMBA 43 A LA COLUMNA DE RECTIFICACION DE BAJA PRESION 10.

Hydrocarbon gas processing

A process and an apparatus are disclosed for separation of a hydrocarbon gas stream containing methane and heavier hydrocarbons and significant quantities of nitrogen and carbon dioxide. The gas stream is cooled and expanded, then fractionated in a first distillation column into a first overhead vapor and a hydrocarbon liquid stream containing the majority of the carbon dioxide. The hydrocarbon liquid stream is fractionated into a hydrocarbon vapor stream and a less volatile fraction comprised of heavier hydrocarbons. The first overhead vapor is cooled, expanded, and separated into vapor and liquid streams. Both streams are cooled and expanded before feeding a second distillation column that produces a second overhead vapor that is predominantly nitrogen and a bottom liquid that is predominantly methane. The bottom liquid is vaporized and combined with the hydrocarbon vapor stream to form a volatile residue gas fraction containing the majority of the methane.

Separation of the constituents of gaseous mixtures

贫氦天然气提氦并联产多产品的系统及方法

本发明公开了一种贫氦天然气提氦并联产多产品的系统及方法。该系统包括：一级制冷装置、一级低温分离器、预脱氮塔、脱甲烷塔、二级制冷装置、提氦塔和脱氮塔等。本发明的系统及方法按组分的沸点由低到高的顺序依次对氮气、甲烷、乙烷和丙烷进行精馏分离，利用预脱氮塔进行氮气与甲烷的分离，塔顶气中氦气浓度可浓缩三十倍左右，同时控制塔顶气中二氧化碳的含量低于50ppm；利用低温精馏实现氮气与氦气的分离。实现天然气中氦气含量在200‑3000ppm的经济有效回收，乙烷的回收率和氦气的回收率均可达到99mol％以上，同时副产LNG、液化石油气和轻烃等，同时副产的低温氮气可提供‑184℃左右温位的冷量，大幅度提高了经济效益。

一种联产轻烃回收及lng天然气提氦一体化集成装置

本发明涉及一种联产轻烃回收与LNG天然气提氦一体化集成装置。本发明包括直接换热轻烃回收单元、氮气膨胀循环制冷单元、粗氦提取单元和换热单元。直接换热轻烃回收单元包括重接触塔、脱乙烷塔、脱丁烷塔；氮气膨胀循环制冷单元包括氮气压缩机、氮气膨胀机和氮气冷却器；粗氦提取单元包括一级提氦塔和二级提氦塔；换热单元包括换热器。该生产工艺采用直接换热轻烃回收+氮气膨胀循环制冷+双塔低温精馏的技术方案，同时能生产LNG和粗氦，还可以回收轻烃，该工艺与其他工艺在相同条件下，氦气回收率高、能耗低、操作温度低、LNG产量及回收率高、设备投资少以及可以将天然气中轻烃回收，达到了余热利用的目的。

一种双塔制氮系统

本发明涉及制氮设备的技术领域，更具体地，涉及一种双塔制氮系统，包括预冷模块、第一纯化模块、换热器、高压氮塔、第一过冷器、第一冷凝蒸发器、低压氮塔、第二冷凝蒸发器、高纯氧塔及第一再沸器；通过设置与低压氮塔相连通的高纯氧塔，使得整个系统不但能够利用空气来生产氮气产品，高纯氧塔还能够利用低压氮塔中的液体及气体来产生高纯氧气产品，即整个系统可以利用空气同时产生氮气产品及高纯氧气产品，充分利用作为原料的空气，提高原材料的投入产出比。

节能型空分精馏工艺

本发明属于空分技术领域，涉及一种节能型空分精馏工艺，包括：1)原料气经热泵精馏塔分离或热耦合精馏塔分离，热泵精馏塔塔顶或热耦合精馏塔塔顶产生产品氮气，热泵精馏塔塔底或热耦合精馏塔塔底产生富氧产品，所述氧产品为液氧或富氧液体；2)步骤1)产生的产品氮气，一部分作为氮产品输出，另一部分经冷凝回流与热泵精馏塔塔内或热耦合精馏塔塔内上升组分换热传质。本发明提供的节能型空分精馏工艺，极大的节约能量，提升产品气的产量和品质，能用于空分制氮、制氧、制氩，得到的产品多样，且浓度高。

一种联产轻烃回收及lng天然气提氦一体化集成装置

本发明涉及一种联产轻烃回收与LNG天然气提氦一体化集成装置。本发明包括直接换热轻烃回收单元、氮气膨胀循环制冷单元、粗氦提取单元和换热单元。直接换热轻烃回收单元包括重接触塔、脱乙烷塔、脱丁烷塔；氮气膨胀循环制冷单元包括氮气压缩机、氮气膨胀机和氮气冷却器；粗氦提取单元包括一级提氦塔和二级提氦塔；换热单元包括换热器。该生产工艺采用直接换热轻烃回收+氮气膨胀循环制冷+双塔低温精馏的技术方案，同时能生产LNG和粗氦，还可以回收轻烃，该工艺与其他工艺在相同条件下，氦气回收率高、能耗低、操作温度低、LNG产量及回收率高、设备投资少以及可以将天然气中轻烃回收，达到了余热利用的目的。

空气分离装置及空气分离方法

本发明的空气分离装置用于在低温下蒸馏空气，具备：高压塔，用于将高压原料空气分离成高压氮气和高压富氧液态空气；低压塔，用于将高压富氧液态空气分离成低压氮气、低压液态氧和富氩液态氧；氩塔，用于将压力高于低压塔压力的富氩液态氧分离成氩气和中压液态氧；第一间接换热器，用于对氩气和低压液态氧进行换热；第二间接换热器，用于对高压氮气和中压液态氧进行换热；第一气液分离室，用于对由第一间接换热器气化的低压氧气和未气化的低压液态氧进行分离；第二气液分离室，用于对由第二间接换热器气化的中压氧气和未气化的中压液态氧进行分离；第一路径，用于连通低压塔的气相部和第二气液分离室的气相部；第二路径，用于连通低压塔的液相部和第二气液分离室；位于第一路径的第一开闭机构；和位于第二路径的第二开闭机构。

一种双塔制氮系统

本发明涉及制氮设备的技术领域，更具体地，涉及一种双塔制氮系统，包括预冷模块、第一纯化模块、换热器、高压氮塔、第一过冷器、第一冷凝蒸发器、低压氮塔、第二冷凝蒸发器、高纯氧塔及第一再沸器；通过设置与低压氮塔相连通的高纯氧塔，使得整个系统不但能够利用空气来生产氮气产品，高纯氧塔还能够利用低压氮塔中的液体及气体来产生高纯氧气产品，即整个系统可以利用空气同时产生氮气产品及高纯氧气产品，充分利用作为原料的空气，提高原材料的投入产出比。

用于低温分离空气的方法和设备

本发明涉及一种低温分离空气的方法，其中使用具有塔系统(10)的空气分离设备(100‑500)，所述塔系统具有第一塔(11)、第二塔(12)、第三塔(13)和第四塔(14)，其中从所述第一塔(11)出来的流体至少被送进所述第二塔(12)中，从所述第二塔(12)出来的流体至少被送进所述第三塔(13)中，从所述第三塔(13)出来的流体至少被送进所述第四塔(14)中以及从所述第四塔(14)出来的流体至少送进所述第三塔(13)中，并且从所述第三塔(13)出来被送进所述第四塔(14)中的流体包含至少一部分侧流，从所述第三塔(13)中取出与所述第三塔底液体相比具有更低氧含量和更高氩含量的所述侧流。提供了通过使所述第一塔(11)的塔顶气体冷凝形成回流液体且所述回流液体以液体形式返回到所述第一塔(11)。为了使所述第一塔(11)的塔顶气体冷凝，提供液体冷却流并且使液体冷却流在与所述塔顶气体的间接热交换中蒸发或部分蒸发，以及使在所述冷却流蒸发或部分蒸发过程中形成的气体对外做功地膨胀直至达到在所述第二压力范围内的压力并被送进所述第二塔(12)中。本发明的主题还涉及一种对应的设备(100‑500)。

节能型空分精馏工艺

本发明属于空分技术领域，涉及一种节能型空分精馏工艺，包括：1)原料气经热泵精馏塔分离或热耦合精馏塔分离，热泵精馏塔塔顶或热耦合精馏塔塔顶产生产品氮气，热泵精馏塔塔底或热耦合精馏塔塔底产生富氧产品，所述氧产品为液氧或富氧液体；2)步骤1)产生的产品氮气，一部分作为氮产品输出，另一部分经冷凝回流与热泵精馏塔塔内或热耦合精馏塔塔内上升组分换热传质。本发明提供的节能型空分精馏工艺，极大的节约能量，提升产品气的产量和品质，能用于空分制氮、制氧、制氩，得到的产品多样，且浓度高。

Air separation device and air separation method

An air separation device for distilling air at a low temperature, includes a high-pressure column to separate high-pressure raw material air into high-pressure nitrogen gas and high-pressure oxygen-enriched liquefied air; a low-pressure column to separate the high-pressure oxygen-enriched liquefied air into low-pressure nitrogen gas, low-pressure liquefied oxygen, and argon-enriched liquefied oxygen; an argon column to separate the argon-enriched liquefied oxygen having a pressure higher than the pressure into argon gas and medium-pressure liquefied oxygen; first and second indirect heat-exchangers; first and second gas-liquid separation chambers; a first/second passage which communicates the gas/liquid phase of the low-pressure column and the gas phase of the second gas-liquid separation chamber; and a first/second opening/closing mechanism located on the first/second passage.

氮制造方法和氮制造装置

提供一种用于制造液氮的、氮回收率高且能量效率高的氮制造方法和氮制造装置。将原料空气的一部分在主热交换器(1)的前段膨胀并冷却，将没有膨胀的剩余原料空气作为用于在主热交换器(1)内部预冷的寒冷利用。另外，将主热交换器(1)内部预冷了的原料空气的一部分向主热交换器(1)外部取出使其膨胀并冷却，将没有膨胀的剩余的预冷了的原料空气作为用于在主热交换器(1)内部冷却的寒冷利用。

Enhanced nitrogen removal in an LNG facility

An LNG facility employing an enhanced nitrogen removal system that concentrates the amount of nitrogen in the feed stream to a nitrogen removal unit (NRU) to thereby increase the separation efficiency of the NRU. In one embodiment, the nitrogen removal system comprises a multistage separation vessel operable to separate nitrogen from a cooled natural gas stream. At least a portion of the resulting nitrogen-containing stream exiting the multistage separation vessel can be used as a refrigerant, processed to a nitrogen removal unit, and/or utilized as fuel gas for the LNG facility.