EP2122282A2 - Procédé de séparation d'un mélange de monoxyde de carbone, de méthane, d'hydrogène et éventuellement d'azote par distillation cryogénique - Google Patents
Procédé de séparation d'un mélange de monoxyde de carbone, de méthane, d'hydrogène et éventuellement d'azote par distillation cryogéniqueInfo
- Publication number
- EP2122282A2 EP2122282A2 EP07871946A EP07871946A EP2122282A2 EP 2122282 A2 EP2122282 A2 EP 2122282A2 EP 07871946 A EP07871946 A EP 07871946A EP 07871946 A EP07871946 A EP 07871946A EP 2122282 A2 EP2122282 A2 EP 2122282A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- column
- carbon monoxide
- methane
- cycle
- denitrogenation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J3/0223—H2/CO mixtures, i.e. synthesis gas; Water gas or shifted synthesis gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J3/0228—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
- F25J3/0233—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 separation of CnHm with 1 carbon atom or more
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J3/0228—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
- F25J3/0252—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 separation of hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J3/0228—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
- F25J3/0257—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 separation of nitrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J3/0228—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
- F25J3/0261—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 separation of carbon monoxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/40—Features relating to the provision of boil-up in the bottom of a column
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/70—Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
- F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/02—Internal refrigeration with liquid vaporising loop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/04—Internal refrigeration with work-producing gas expansion loop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/08—Internal refrigeration by flash gas recovery loop
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/24—Quasi-closed internal or closed external carbon monoxide refrigeration cycle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S62/00—Refrigeration
- Y10S62/92—Carbon monoxide
Definitions
- the present invention relates to a process for separating a mixture of carbon monoxide, methane, hydrogen and optionally nitrogen by cryogenic distillation.
- Carbon monoxide from cold boxes H2 / CO carries with it a significant fraction of the nitrogen present in the feed gas. This phenomenon is related to the difficulty of separating the two components CO and N 2 , their bubble points being very close. Nevertheless, depending on the use made of the CO downstream of the cold box, it is sometimes necessary to reduce its nitrogen content before exporting it.
- denitrogenation column whose function is to produce carbon monoxide tank at the required purity.
- a nitrogen purge containing a fraction of CO is recovered.
- the denitrogenation column is located either upstream or downstream of the CO / CH 4 separation column.
- One of the existing processes described in US-A-4478621 comprises a denitrogenation column equipped with a condenser at the head.
- the refrigerant of the head condenser of the denitrogenation column is liquid CO whose pressure is close to atmospheric pressure. At this pressure level, the vaporization temperature of the CO is too low to cool the feed gas at the inlet of the methane wash column: the methane could freeze. In order to cool the feed gas, the process thus provides CO vaporization at a higher pressure level.
- the present invention consists in using a single CO vaporization pressure, to satisfy the following needs: refrigerant supply to the condenser (s) (from the denitrogenation column and / or the CO / CH 4 separation column) and / or cooling of the feed gas to the inlet of the methane wash column and / or subcooling of the methane wash column. Given the stress on the methane freezing temperature, this pressure is about 2.6 bar abs. 2)
- the invention furthermore consists in using a single CO cycle pressure to satisfy the requirements of the reboilers of the flash column and of the CO / CH 4 column. This pressure can be between 25 and 45 bar, preferably between 32 and 45 bar. The placement of these reboilers on the CO circuit can be done either in parallel or in series. This configuration simplifies the design of the cycle compressor and the exchange line.
- the invention consists in providing the reboiling requirements of the denitrogenation column by direct injection of pure gaseous CO into the tank, itself derived from the mixture of two (or three) streams: a) The first stream is derived from the vaporization of liquid CO in the exchange line, at the appropriate temperature and pressure to feed the denitrogenation column, that is to say at medium pressure (3.5 to 5 bar abs). b) The second stream is directly from the cycle compressor (it is cooled in the exchange line). c) The third (optional) current comes from the exhaust of the cryogenic CO turbine (it is possibly cooled in the exchange line).
- the first advantage of the invention is that the lowest CO vaporization pressure is about 2.6 bar abs, and the highest pressure around 35 bar abs. This most often makes it possible to compress the CO cycle by a centrifugal compressor with five stages (six maximum). In addition, the HP cycle pressure corresponds fairly well with the CO pressures often required (especially for the production of acetic acid).
- the second advantage of the invention is that it shows two levels of CO vaporization in the exchange line: one to 2.6b, the other to 4b. This saves energy on the CO cycle.
- the third advantage of the invention is to provide two or three adjustment levers for controlling the reboiling of the denitrogenation column.
- a process for separating a mixture comprising at least carbon monoxide, hydrogen and methane in which the mixture is separated in a methane washing column, and the mixture at least a portion of the liquid fraction of the tank of the methane wash column at a depletion column, at least a portion of the liquid fraction of the depletion column is sent to a CO / CH 4 separation column to produce a liquid flow enriched in methane and a gas flow enriched in carbon monoxide, at least a portion of the liquid flow is sent to the head of the methane washing column and the gas flow enriched in carbon monoxide is withdrawn, the process being at least partially cooled by a carbon monoxide cycle, said cycle providing at least partially the condensation at the top of the CO / CH4 separation column and / or the reboiling in the bottom of the exhaust column and / or re-boiling of the CO / CH4 separation column and / or cooling of the mixture for the methane
- a carbon monoxide compressor may have an inlet pressure of at least 1.5 bar, possibly at least 2 bar, and receive carbon monoxide directly from at least one of the following steps without having been compressed: o condensation at the top of the CO / CH separation column 4 o cooling of the mixture for the methane washing column o cooling of the methane for the methane washing column o subcooling of the column methane washing o condensation at the top of the denitrogenation column
- the mixture also contains nitrogen and the carbon monoxide enriched gas flow is sent to a denitrogenation column to produce a carbon monoxide rich liquid flow and a nitrogen-rich gas flow, said carbon monoxide cycle ensuring at least partially condensation at the top of the denitrogenation column.
- the carbon monoxide cycle is compressed at high pressure by a cycle compressor, then expanded in a turbine and sent in gaseous form in the tank of the CO / CH4 separation column.
- carbon monoxide of the cycle is compressed by a cycle compressor at a high pressure, then expanded in a turbine and sent in gaseous form in the tank of the denitrogenation column.
- the ring carbon monoxide is compressed in a first cycle compressor at a medium pressure and then partly by the cycle compressor at a high pressure and a part of the carbon monoxide at the medium pressure is sent in gaseous form to the denitration column.
- the ring carbon monoxide is compressed in a first cycle compressor at a medium pressure and then a first part of the carbon monoxide cycle is sent to the bottom of the denitrogenation column and a second part of the carbon monoxide is compressed to high pressure.
- a cycle rate CO at between 25 and 45 bar, preferably between 32 and 35 bar heats the tank of the exhaustion column and / or the tank of the separation column.
- a cycle flow rate CO at between 25 and 45 bar, preferably at between 32 and 35 bar is expanded at the pressure of the denitrogenation column.
- the CO cycle flow liquefies and vaporizes in a line of exchange and is sent to the bottom of the denitrogenation column.
- the mixture to be separated in the methane washing column is cooled by heat exchange with a carbon monoxide flow rate of at least 2 bars, or even between 2 and 3 bars.
- flow rates enriched in carbon monoxide at substantially the same pressure, preferably between 2 and 4 bar, and even between 2 and 3 bar, provide at least two of the following functions: supply of frigories to the top condenser of the denitrogenation column, under cooling of the denitrogenation column and cooling of the washing column.
- a separation plant of a mixture comprising at least carbon monoxide, hydrogen and methane comprising in which a methane washing column, a depletion column. and a CO / CH4 separation column, a conduit for feeding the mixture into the methane wash column, a conduit for sending at least a portion of the liquid fraction from the tank of the methane wash column to the column of exhaustion, a pipe for sending at least a portion of the liquid fraction of the depletion column to the CO / CH 4 separation column to produce a methane enriched liquid flow and a carbon monoxide enriched gas flow, a conduit for sending at least a portion of the methane-enriched liquid flow to the head of the methane wash column and a line for withdrawing the carbon monoxide-enriched gas flow from the CO / CH4 separation column, the installation being kept at least partly in cold by a carbon monoxide cycle, said cycle ensuring at least partially the cooling of a condenser at the top of
- the mixture also contains nitrogen and the plant comprises a denitrogenation column and a pipe for sending the carbon monoxide enriched gas flow to the denitrogenation column for producing a liquid flow rich in carbon monoxide and a gas flow rich in nitrogen, said carbon monoxide cycle at least partially ensuring the cooling of a condenser at the top of the denitrogenation column.
- the installation may also include:
- the ring carbon monoxide is optionally compressed in a first cycle compressor at medium pressure and then a first part of the ring carbon monoxide is sent to the bottom of the denitrogenation column and a second part of the carbon monoxide is compressed to high pressure.
- the installation may include:
- a flow containing carbon monoxide, hydrogen, methane and nitrogen 45 cools in exchanger 9 by heat exchange with a flow of carbon monoxide 1 and is sent to a methane scrubber column.
- the bottom liquid of the column C1 is sent to the top of the depletion column C2.
- the overhead gas of the C1 column enriched in hydrogen leaves the installation.
- the bottoms liquid from the exhaust column C2 is sent to a CO / C3 methane separation column.
- the bottom liquid of column C3 is returned to the top of column C1.
- the top gas of column C3 is sent to a point intermediate of the denitrogenation column C4 where it separates into a carbon monoxide rich liquid in the tank and a nitrogen-rich gas at the head.
- the diagram of the columns thus corresponds to that of Figure 6 of Linde Reports on Science and Technology, "Progress in H 2 / CO Low-Temperature Separation" by Berninger, 44/1988.
- the cycle of production of frigories is very different from that of anteriority.
- the Berninger scheme has two disadvantages compared to that of the invention:
- a flow of synthesis gas is sent to a methane washing column C1 fed at the top by a flow of liquid methane 4.
- the tank liquid (not shown) is sent to the exhaust column C2 in a known manner and a fluid hydrogen-free is sent from the exhaust column C2 to the CO / CH 4 C3 separation column.
- a flow rate enriched with carbon monoxide is withdrawn at the top of column C3 is sent to denitrogenation column C4 to remove nitrogen.
- a flow of impure carbon monoxide 1 at a low pressure is sent to a compressor stage V1. Part 3 of carbon monoxide compressed at between 3.5 and 5 bar, for example 4.3 bar in V1, cools in exchanger 9 and is sent to the bottom of the denitrogenation column C4 in gaseous form.
- the rest of the carbon monoxide is compressed again in a compressor V2 to a pressure between 25 and 45 bar, preferably between 32 and 35 bar to form the flow 5.
- This flow is divided into a part 7 which constitutes a production and another flow which is sent to the exchanger 9.
- a fraction 13 completely crosses the exchanger before being divided into three.
- a first flow 19 serves to reboil the exhaust column C2
- a second flow 23 serves to reboil the CO / methane C3 column and the two cooled flow rates 19, 23 are sent with the third flow 21 to a heat exchanger 17 where they liquefy .
- the flow 23 is divided in two, a portion 25 being expanded in a valve 27 and then vaporized in the exchanger 17 and sent in gaseous form in the tank of the denitrogenation column C4.
- the remainder 26 of the flow 23 is expanded to a pressure of 2.6 bar and sent to a separator pot 35 after expansion in a valve.
- the flow rates 21, 19 are also expanded in valves and sent to the same separator pot 35.
- the gas 43 formed in the separator pot 35 is returned to the compressor V1 after reheating in the exchanger 9.
- the liquid of the separator pot 35 is divided into four.
- a part 1 is sent to a separator pot 33 where it forms a gaseous fraction 41 and a liquid fraction 31.
- the liquid fraction 31 vaporizes in the exchanger 17.
- the gaseous fraction 41 is heated in the exchanger 17 against the flow rates 19 , 21,
- Part 2 serves to sub-cool the methane wash column C1 before being mixed with the flow 41.
- Part 3 serves to condense the head of the CO / methane C3 column where it vaporizes and is then returned to the compressor V1.
- the fourth portion 37 is mixed with the bottom liquid 29 of the denitrogenation column and serves to cool the head thereof.
- the formed flow 39 is returned to the compressor V1.
- a flow 11 cools partially in the exchanger 9, is expanded in a turbine T, cools in the exchanger 17 as flow 15 and is sent to the bottom of the denitrogenation column C4.
- a C1 methane scrubbing column, a C2 exhaustion column and a CO / CH 4 C3 separation column are recognized. To simplify Figure 2, only the carbon monoxide cycle is shown.
- a flow containing carbon monoxide, hydrogen, methane and nitrogen cools in the exchanger 9 by heat exchange with a flow of carbon monoxide 1 and is sent to a column C1 methane washing system fed at the top by a flow of liquid methane at very low temperature.
- the bottom liquid of the column C1 is sent to the top of the depletion column C2.
- the overhead gas of the C1 column enriched in hydrogen leaves the installation.
- the bottoms liquid from the exhaust column C2 is sent to a CO / C3 methane separation column.
- the bottom liquid of column C3 is returned to the top of column C1.
- a flow of impure carbon monoxide 1 at a low pressure is sent to a compressor stage V1.
- the carbon monoxide from the stage V1 is compressed again in a compressor V2 to a pressure between 25 and 45 bar, preferably between 32 and 35 bar to form the flow rate.
- This flow is divided into a portion 7 which is a production of high pressure carbon monoxide and another flow rate which is sent to the exchanger 9.
- a fraction 13 completely crosses the exchanger before being divided into three.
- a first flow 19 serves to reboil the exhaust column C2
- a second flow 23 serves to reboil the CO / methane C3 column and the two cooled flow rates 19, 23 are sent with the third flow 21 to a heat exchanger 17 where they liquefy .
- the flow 23 is divided in two, a portion 25 being expanded in a valve 27 and then vaporized in the exchanger 17 and sent in gaseous form to the compressor V2.
- the remainder 26 of the flow 23 is expanded to a pressure of 2.6 bar and sent to a separator pot 35 after expansion in a valve.
- the flow rates 21, 19 are also expanded in valves and sent to the same separator pot 35.
- the gas 43 formed in the separator pot 35 is returned to the compressor V1 after reheating in the exchanger 9.
- the liquid of the separator pot 35 is divided into three. Part 1 is sent to a separator pot 33 where it forms a gaseous fraction 41 and a liquid fraction 31.
- the liquid fraction 31 vaporizes in the exchanger 17.
- the gaseous fraction 41 is heated in the exchanger 17 against the flow rates 19, 21, 23 before being returned to the compressor V1.
- Part 2 serves to sub-cool the methane wash column C1 before being mixed with the flow 41.
- the third part 37 serves to cool the head of the column CO / CH4 C3.
- the formed flow 39 is returned to the compressor V1.
- a flow 11 cools partially in the exchanger 9, is expanded in a turbine T, warms up in the exchanger 9 and joins the inlet of the compressor V2.
- FIG. 3 a separator pot C1, a depletion column C2, a CO / CH 4 C3 separation column and a CO C4 denitrogenation column are recognized. To simplify Figure 3, only the synthesis gas inlet the carbon monoxide cycle is shown.
- a flow rate 45 containing carbon monoxide, hydrogen, methane and nitrogen is cooled in exchanger 9 by heat exchange with a flow of carbon monoxide 1 and then in exchanger 17 and is sent to the separator pot.
- the tank liquid of the pot C1 is sent to the top of the depletion column C2.
- the overhead gas of the C1 column enriched in hydrogen leaves the installation.
- the bottom liquid of the exhaustion column C2 is cooled in the exchanger 17 and sent to a CO / methane C3 separation column. This bottom liquid cools in the exchanger 17, is divided in two, a portion 57 is sent to the CO / methane separation column and the remainder 55 is expanded, reheated in the exchanger 17 to an intermediate temperature and sent to the CO / C3 methane separation column.
- a flow of impure carbon monoxide 1 at a low pressure is sent to a compressor stage V1.
- Medium pressure carbon monoxide is divided in half.
- the medium pressure flow 3 cools in the exchanger 9 and mixed with carbon monoxide from the turbine T and is sent to the bottom of the denitrogenation column C4.
- a portion 11 at an intermediate temperature is expanded in a turbine T and sent to the denitrogenation column.
- a fraction 13 completely crosses the exchanger before being divided into three.
- a first flow 19 serves to reboil the exhaust column C2
- a second flow 23 serves to reboil the CO / methane C3 column and the two cooled flow rates 19, 23 are sent with the third flow 21 to a heat exchanger 17 where they liquefy .
- the flow 23 is divided in two, a portion 25 being expanded in a valve 27 and then vaporized in the exchanger 17 and sent in gaseous form to the denitrogenation column C4.
- the remainder 26 of the flow 23 is expanded to a pressure of 2.6 bar and sent to a separator pot 35 after expansion in a valve.
- the flow rates 21, 19 are also expanded in valves and sent to the same separator pot 35.
- the gas 43 formed in the separator pot 35 is returned to the compressor V1 after reheating in the exchanger 9.
- the liquid of the separator pot 35 is divided into three.
- a part 1 is sent to a separator pot 33 where it forms a gaseous fraction 41 and a liquid fraction 31.
- the liquid fraction 31 vaporizes in the exchanger 17.
- the gaseous fraction 41 is heated in the exchanger 17 against the flow rates 19 , 21, 23 before being returned to the compressor V1.
- Part 2 serves to cool the head of the column CO / CH 4 C3.
- the formed flow 39 is returned to the compressor V1.
- the third part 37 serves to cool the head of the denitrogenation column C4.
- the formed flow 39 is returned to the compressor V1.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL07871946T PL2122282T3 (pl) | 2006-12-21 | 2007-12-14 | Sposób rozdzielania mieszaniny tlenku węgla, metanu, wodoru i azotu przez destylację kriogeniczną |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0655775A FR2910603B1 (fr) | 2006-12-21 | 2006-12-21 | Procede de separation d'un melange de monoxyde de carbone, de methane, d'hydrogene et eventuellement d'azote par distillation cryogenetique |
| FR0755103A FR2916264A1 (fr) | 2006-12-21 | 2007-05-16 | Procede de separation d'un melange de monoxyde de carbone, de methane, d'hydrogene et eventuellement d'azote par distillation cryogenique |
| PCT/FR2007/052530 WO2008087318A2 (fr) | 2006-12-21 | 2007-12-14 | Procédé de séparation d'un mélange de monoxyde de carbone, de méthane, d'hydrogène et éventuellement d'azote par distillation cryogénique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2122282A2 true EP2122282A2 (fr) | 2009-11-25 |
| EP2122282B1 EP2122282B1 (fr) | 2018-06-27 |
Family
ID=39636422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07871946.5A Active EP2122282B1 (fr) | 2006-12-21 | 2007-12-14 | Procédé de séparation d'un mélange de monoxyde de carbone, de méthane, d'hydrogène et d'azote par distillation cryogénique |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8959952B2 (fr) |
| EP (1) | EP2122282B1 (fr) |
| CN (1) | CN101680713B (fr) |
| ES (1) | ES2683145T3 (fr) |
| FR (1) | FR2916264A1 (fr) |
| PL (1) | PL2122282T3 (fr) |
| WO (1) | WO2008087318A2 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019180374A1 (fr) * | 2018-03-21 | 2019-09-26 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede et appareil de separation d'un gaz de synthese par distillation cryogenique |
| FR3079288A1 (fr) * | 2018-03-21 | 2019-09-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede et appareil de separation d'un gaz de synthese par distillation cryogenique |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2930332A1 (fr) * | 2008-04-18 | 2009-10-23 | Air Liquide | Procede et appareil de separation cryogenique d'un melange d'hydrogene et de monoxyde de carbone |
| CN102963944B (zh) * | 2011-08-30 | 2014-09-03 | 中国石油化工股份有限公司 | 一种co变换冷凝液汽提塔 |
| FR2991442B1 (fr) * | 2012-05-31 | 2018-12-07 | L'air Liquide,Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Appareil et procede de separation cryogenique d'un melange de monoxyde de carbone et de methane ainsi que d'hydrogene et/ou d'azote |
| FR2992307B1 (fr) * | 2012-06-25 | 2014-08-08 | Air Liquide | Procede et installation pour la production combinee de gaz de synthese d'ammoniac et de dioxyde de carbone |
| FR3011069B1 (fr) * | 2013-09-24 | 2015-09-11 | Air Liquide | Procede et appareil de separation cryogenique d'un melange contenant au moins du monoxyde de carbone, de l'hydrogene et de l'azote |
| FR3011320A1 (fr) * | 2013-10-02 | 2015-04-03 | Air Liquide | Procede et appareil de separation par distillation cryogenique d'un melange compose d'hydrogene, de monoxyde de carbone et de methane |
| FR3052159B1 (fr) * | 2016-06-06 | 2018-05-18 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede et installation pour la production combinee d'un melange d'hydrogene et d'azote ainsi que de monoxyde de carbone par distillation et lavage cryogeniques |
| US11137204B2 (en) * | 2016-08-25 | 2021-10-05 | Praxair Technology, Inc. | Process and apparatus for producing carbon monoxide |
| FR3058996B1 (fr) * | 2016-11-18 | 2022-01-07 | Air Liquide | Procede et installation de separation cryogenique d’un melange gazeux par lavage au methane |
| CN107543369B (zh) * | 2017-08-15 | 2020-06-16 | 成都深冷液化设备股份有限公司 | 一种深冷分离co、h2的双循环甲烷洗涤系统及方法 |
| FR3084739B1 (fr) * | 2018-07-31 | 2020-07-17 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Echangeur de chaleur a configuration de passages amelioree, procedes d'echange de chaleur associes |
| CN108826831B (zh) * | 2018-08-24 | 2023-09-29 | 杭州中泰深冷技术股份有限公司 | 氮循环制冷的深冷分离一氧化碳气体的装置和工艺 |
| CN110398133B (zh) * | 2019-07-14 | 2023-05-23 | 杭氧集团股份有限公司 | 一种分离合成气生产高纯co、压缩天然气的深冷分离装置 |
| FR3099563B1 (fr) * | 2019-08-01 | 2021-07-30 | Air Liquide | Echangeur de chaleur avec configuration de passages et structures d’échange thermique améliorées |
| FR3100057A1 (fr) * | 2019-08-20 | 2021-02-26 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Procede et appareil de production de monoxyde de carbone par condensation partielle |
| CN113862051B (zh) * | 2021-09-27 | 2024-02-13 | 北京石油化工工程有限公司 | 双制冷循环甲烷洗合成气深冷分离装置及分离方法 |
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| GB1351598A (en) * | 1970-03-26 | 1974-05-01 | Air Prod & Chem | Separation of gas mixtures |
| US4102659A (en) * | 1976-06-04 | 1978-07-25 | Union Carbide Corporation | Separation of H2, CO, and CH4 synthesis gas with methane wash |
| DE2912761A1 (de) * | 1979-03-30 | 1980-10-09 | Linde Ag | Verfahren zum zerlegen eines gasgemisches |
| DE3215829A1 (de) * | 1982-04-28 | 1983-11-03 | Linde Ag, 6200 Wiesbaden | Verfahren zur gewinnung von kohlenmonoxid |
| FR2718428B1 (fr) * | 1994-04-11 | 1997-10-10 | Air Liquide | Procédé et installation de production de monoxyde de carbone. |
| DE4433114A1 (de) * | 1994-09-16 | 1996-03-21 | Linde Ag | Verfahren zum Gewinnen einer Kohlenmonoxid-Reinfraktion |
| GB9800693D0 (en) * | 1998-01-13 | 1998-03-11 | Air Prod & Chem | Separation of carbon monoxide from nitrogen-contaminated gaseous mixtures |
| GB9800692D0 (en) * | 1998-01-13 | 1998-03-11 | Air Prod & Chem | Separation of carbon monoxide from nitrogen-contaminated gaseous mixtures also containing hydrogen and methane |
| FR2775275B1 (fr) * | 1998-02-20 | 2000-05-19 | Air Liquide | Procede et installation pour la production combinee d'un melange de synthese d'ammoniac et de monoxyde de carbone |
| GB0218815D0 (en) * | 2002-08-13 | 2002-09-18 | Air Prod & Chem | Process and apparatus for the production of hydrocarbon compounds from methane |
| JP2009502714A (ja) * | 2005-07-28 | 2009-01-29 | イネオス ユーエスエイ リミテッド ライアビリティ カンパニー | 炭化水素流からの一酸化炭素及び水素の回収 |
-
2007
- 2007-05-16 FR FR0755103A patent/FR2916264A1/fr active Pending
- 2007-12-14 CN CN2007800477381A patent/CN101680713B/zh active Active
- 2007-12-14 EP EP07871946.5A patent/EP2122282B1/fr active Active
- 2007-12-14 US US12/519,922 patent/US8959952B2/en active Active
- 2007-12-14 ES ES07871946.5T patent/ES2683145T3/es active Active
- 2007-12-14 PL PL07871946T patent/PL2122282T3/pl unknown
- 2007-12-14 WO PCT/FR2007/052530 patent/WO2008087318A2/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008087318A2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019180374A1 (fr) * | 2018-03-21 | 2019-09-26 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede et appareil de separation d'un gaz de synthese par distillation cryogenique |
| FR3079288A1 (fr) * | 2018-03-21 | 2019-09-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede et appareil de separation d'un gaz de synthese par distillation cryogenique |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008087318A2 (fr) | 2008-07-24 |
| CN101680713B (zh) | 2013-08-14 |
| CN101680713A (zh) | 2010-03-24 |
| US20100043489A1 (en) | 2010-02-25 |
| ES2683145T3 (es) | 2018-09-25 |
| US8959952B2 (en) | 2015-02-24 |
| EP2122282B1 (fr) | 2018-06-27 |
| FR2916264A1 (fr) | 2008-11-21 |
| WO2008087318A3 (fr) | 2009-11-26 |
| PL2122282T3 (pl) | 2018-12-31 |
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