Patent application number | Description | Published |
20080196583 | PROCESS FOR RECYCLING OF TOP GAS DURING CO2 SEPARTION - An improved process for the separation of carbon dioxide from the flue gas of an oxy-combustion power plant is provided. The flue gas is compressed, cleaned, cooled and dried. This flue gas stream contains carbon dioxide and oxygen, and is sent to a column. This column may be a distillation column or a stripping column. This column separates the inlet stream into a top gas stream and a bottom liquid stream. The top gas from the column is combined with the inlet stream. | 08-21-2008 |
20080196584 | PROCESS FOR FEED GAS COOLING IN REBOILER DURING CO2 SEPARATION - An improved process for the separation of carbon dioxide from the flue gas of an oxy-combustion power plant is provided. An inlet stream containing carbon dioxide and oxygen is at least partially condensed in the reboiler of a stripping column. The condensed inlet stream is then separated in a separator, thereby producing a first liquid stream and a first gas stream. The first liquid stream is then separated into a top gas stream and a bottom liquid stream in the stripping column. The top gas stream is then warmed by indirect heat exchange in the heat exchanger. The warmed top gas stream is then recycled and combined with the inlet stream | 08-21-2008 |
20080196585 | Process for Vaporizing the Product CO2 at Two Different Pressures during CO2 Separation - An improved process for the separation of carbon dioxide from the flue gas of an oxy-combustion power plant is provided. At least a first product stream and a second product stream are separated from a flue gas stream, wherein the pressure of the first product stream and the pressure of the second product stream are different. The first product stream is warmed and vaporized. The second product stream is then warmed and vaporized | 08-21-2008 |
20080196587 | CO2 SEPARATION APPARATUS AND PROCESS FOR OXY-COMBUSTION COAL POWER PLANTS - An improved process for the separation of carbon dioxide from the flue gas of an oxy-combustion power plant is provided. The flue gas is compressed, cleaned, cooled and dried. This clean, compressed dry flue gas is then further cooled, partially condensed and separated into liquid and vapor streams. The liquid streams, which contain a high concentration of carbon dioxide, are vaporized, compressed and exported to an end user. The vapor streams are heated and expanded, in order to extract useable energy. At least two expanders are used to extract this energy, with an intermediate warming step. | 08-21-2008 |
20090007595 | Low Temperature Air Separation Process for Producing Pressurized Gaseous Product - A compressed air stream is cooled in an exchanger to form a compressed cooled air stream. The stream is then cryogenically compressed in a first compressor to form a first pressurized gas stream. The first pressurized gas stream is further cooled in the exchanger, cryogenically compressed in a second compressor, and then it is cooled and partially liquefied. The cooled and partially liquefied product is then fed to a system of distillation columns. A liquid product is removed from the system of distillation columns. This product is then pressurized, vaporized and warmed in the exchanger to yield pressurized gaseous product. | 01-08-2009 |
20090013717 | PROCESS AND APPARATUS FOR THE SEPARATION OF A GASEOUS MIXTURE - A process for separating carbon dioxide from a carbon dioxide containing fluid comprises the steps of: compressing the fluid in a compressor to form a compressed fluid, drying at least part of the compressed fluid to form a compressed and dried fluid, cooling at least part of the compressed and dried fluid to form a compressed, dried and cooled fluid, separating the compressed, dried and cooled fluid at a temperature lower than 0° C. into a carbon dioxide rich stream, a carbon dioxide lean stream and at least one intermediate purity liquid stream having a carbon dioxide purity lower than that of the carbon dioxide rich stream and higher than that of the carbon dioxide lean stream, expanding at least one intermediate purity liquid stream to produce at least one expanded stream using at least one expanded stream to cool the compressed and dried fluid and recycling at least part of the expanded stream. | 01-15-2009 |
20090013868 | PROCESS AND APPARATUS FOR THE SEPARATION OF A GASEOUS MIXTURE - A process for separating carbon dioxide from a compressed, dried and cooled carbon dioxide containing fluid comprises separating the fluid into at least a carbon dioxide enriched stream, and a carbon dioxide depleted stream, expanding at least part of the carbon dioxide lean stream in an expander, compressing a process stream wherein the power for the compression step is at least in part provided by the power generated by the expander. | 01-15-2009 |
20090013871 | PROCESS AND APPARATUS FOR THE SEPARATION OF A GASEOUS MIXTURE - A process for separating carbon dioxide from a fluid containing carbon dioxide, NO | 01-15-2009 |
20090178408 | THERMAL INTEGRATION OF OXYGEN PLANTS - A process for the integration of a cryogenic air separation plant and an oxy-combustion power plant is presented. This process includes producing a pressurized nitrogen stream and a pressurized oxygen stream within said cryogenic air separation plant. This process also includes burning a fuel stream thereby generating a steam stream from a boiler feed water stream, wherein said stream is used for work expansion within said oxy-combustion power plant. This process also includes heating said pressurized nitrogen stream and said pressurized oxygen stream with a compressed air stream that is extracted from the air compressor of said cryogenic air separation plant, thereby forming a heated pressurized nitrogen stream and a heated pressurized oxygen stream. This process also includes burning a fuel stream with said heated pressurized oxygen stream to produce a flue gas stream. This process also includes heating said heated pressurized nitrogen stream to form a hot pressurized nitrogen stream. This process also includes work expanding said hot pressurized nitrogen stream to a lower pressure thereby forming a hot exhaust nitrogen stream and recovering energy. And this process also includes heating said boiler feed water stream by indirect heat exchange with said hot exhaust nitrogen stream. | 07-16-2009 |
20100077796 | Hybrid Membrane/Distillation Method and System for Removing Nitrogen from Methane - A hybrid gas separation membrane/cryogenic distillation method and system produces high purity gaseous methane from a gas mixture containing a majority of methane and a minority of nitrogen. | 04-01-2010 |
20100206165 | Method For The Purification Of A Gas Containing CO2 Using An Adsorption Purification Unit - A method for the purification of a feed gas stream containing CO | 08-19-2010 |
20100206202 | Process and Apparatus For The Separation of A Gaseous Mixture - A process for separating carbon dioxide from a fluid containing carbon dioxide, NO | 08-19-2010 |
20100263529 | Method For The Purification Of A Gas Containing CO2 - A method for the purification of a feed gas stream containing at least CO | 10-21-2010 |
20110146343 | 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. | 06-23-2011 |
20110146344 | 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. | 06-23-2011 |
20110302956 | Rare Gases Recovery Process For Triple Column Oxygen Plant - The present invention is a process for recovering rare gases from a multiple column oxygen plant, wherein the multiple column oxygen plant comprises a higher pressure column, a lower pressure column, a middle pressure intermediate column, and a low pressure intermediate column, said middle pressure intermediate column comprising a first bottom reboiler and said low pressure intermediate column comprising a second bottom reboiler. The process includes providing a first oxygen rich liquid stream containing rare gases from the higher pressure column, wherein said first oxygen rich liquid stream is introduced to the first bottom reboiler. The process also includes removing a second oxygen rich liquid stream rich in rare gases from the bottom of the middle pressure intermediate column, wherein said second oxygen rich liquid stream is introduced to the low pressure intermediate column. The process also includes removing a first liquid purge stream concentrated in rare gases is removed from the low pressure intermediate column, wherein said first liquid purge stream is further concentrated downstream. And the process includes removing a third oxygen rich liquid stream lean in rare gases at a location that is at least one tray above the first bottom reboiler, wherein said third oxygen rich liquid stream is introduced to the lower pressure column. | 12-15-2011 |
20120144861 | Process And Installation For Producing High-Pressure Nitrogen - A method and apparatus for producing high pressure nitrogen is provided. This system includes a first compressor for compressing air and cooling air to substantially the dew-point, a high pressure column, a medium pressure column, a conduit for introducing at least a portion of the compressed air at a base of the high pressure column; a conduit for removing a oxygen enriched liquid from the base of the high pressure column; a first valve for reducing the pressure of the oxygen enriched liquid to a medium pressure, where the medium pressure is between the high pressure and atmospheric pressure, a conduit for introducing the oxygen enriched liquid at an intermediate place of the medium pressure column; a second expander for reducing the pressure of at least a part of the liquid removed from the base of the medium pressure distillation column, to a low pressure to cool a top condenser of the medium pressure column and to form a waste vapor stream; a cold compressor for compressing a vapor stream removed form the medium pressure column, cooling the compressed vapor stream, and introducing it into the base of the high pressure column; a heat exchanger for heating the waste vapor stream, a first expander for expanding the heated stream to produce power; a conduit for withdrawing liquid from the top of the medium pressure column, pump for pumping the withdrawn liquid to high pressure and injecting it at the top of the high pressure column; and conduit for withdrawing product nitrogen from the top of the high pressure column. | 06-14-2012 |
20120151961 | Liquid Air As Energy Storage - A method of liquid air energy storage is provided. This method includes liquefying and storing air to form a stored liquid air during a first period of time; during a second period of time, introducing a compressed air stream into a cryogenic system, wherein the cryogenic system comprises at least one cold compressor, and at least one heat exchanger. The method includes producing a first exhaust stream and a second exhaust stream. The method also includes vaporizing at least part of the stored liquid air stream in the heat exchanger, thereby producing a first high pressure compressed air stream, then combining the first high pressure compressed air stream, the first exhaust stream and the second exhaust stream to form a combined exhaust stream, heating the combined exhaust stream, then expanding the heated combined exhaust stream in an expansion turbine to produce power. | 06-21-2012 |
20130219959 | PROCESS AND APPARATUS FOR THE SEPARATION OF AIR BY CRYOGENIC DISTILLATION - The present invention relates to a process and apparatus for the separation of air by cryogenic distillation. In particular, it relates to a process for separation of air using three cryogenic distillation columns for the production of gaseous oxygen. Certain embodiments of the invention are particularly efficient for the production of gaseous oxygen at pressures between 30 and 45 bars abs, in which the oxygen is produced by removing liquid oxygen from a distillation column, pressurizing the oxygen and vaporizing the pressurized liquid by heat exchange with air. | 08-29-2013 |
20130255313 | PROCESS FOR THE SEPARATION OF AIR BY CRYOGENIC DISTILLATION - A process for separation of air by cryogenic distillation, including cooling a first purified feed air stream in a heat exchanger, thereby producing a cooled first feed stream, removing a first portion from the heat exchanger at a first intermediate temperature, and compressing the cooled first portion in a first booster compressor, cooling the compressed first portion in the heat exchanger, thereby producing a cooled first portion, removing a second portion from the heat exchanger at a second intermediate temperature, and compressing the cooled second portion in a second booster compressor, cooling the compressed second portion in the heat exchanger, thereby producing a cooled second portion, and vaporizing a pressurized liquid stream from the column system in the heat exchanger at a vaporization temperature to form a pressurized gaseous product stream, wherein, both the first discharge temperature and said second discharge temperature are below −55° C. | 10-03-2013 |
20140165648 | PURIFICATION OF INERT GASES TO REMOVE TRACE IMPURITIES - A method for purifying an argon stream is provided. The method includes pretreating an argon waste stream to remove impurities to provide a pre-treated argon waste stream having argon, nitrogen, and hydrogen; cooling the argon waste stream to create a cold feed stream; and condensing the cold feed stream to create a liquid feed stream. The liquid feed stream is fed to the cryogenic distillation column to create a bottoms argon product stream and a gas waste stream. The bottoms argon product stream travels to an expansion device to provide a cooled bottoms argon product stream, which can optionally be combined with an argon lift stream downstream of the expansion device. The combined argon lift stream and cooled bottoms argon product stream are fed to the overhead condenser and vaporized to create a purified vapor phase argon stream. | 06-19-2014 |
20140165649 | PURIFICATION OF INERT GASES TO REMOVE TRACE IMPURITIES - An argon purification system is provided which includes a cryogenic heat exchanger, a cryogenic distillation column. The cryogenic heat exchanger is configured to remove heat from a pre-treated argon waste stream to create a cold feed stream. The cryogenic distillation column includes packing, a reboiler, and an overhead condenser, as well as an upper portion and a lower portion and is configured to receive a liquid feed stream and to produce a bottoms argon product stream and a gas waste stream. The reboiler is positioned in the lower portion of the cryogenic distillation column and is configured to condense the cold feed stream to produce the liquid feed stream. The condenser is positioned in the upper portion of the cryogenic distillation column and is configured to heat the bottoms argon product stream such that the bottoms argon product stream evaporates to a purified vapor phase argon stream. | 06-19-2014 |
20140260422 | Low Temperature Air Separation Process for Producing Pressurized Gaseous Product - A compressed air stream is cooled in an exchanger to form a compressed cooled air stream. The stream is then cryogenically compressed in a first compressor to form a first pressurized gas stream. The first pressurized gas stream is further cooled in the exchanger, cryogenically compressed in a second compressor, and then it is cooled and partially liquefied. The cooled and partially liquefied product is then fed to a system of distillation columns. A liquid product is removed from the system of distillation columns. This product is then pressurized, vaporized and warmed in the exchanger to yield pressurized gaseous product. | 09-18-2014 |
20140318179 | Process And Apparatus For The Separation Of Air By Cryogenic Distillation - An apparatus for the separation of air by cryogenic distillation comprises a column system including a double column, an intermediate pressure column, and an argon column having a top condenser, a heat exchanger, means for pressurizing and vaporizing oxygen rich liquid and nitrogen rich liquid from the double column, conduits configured to: send argon enriched gas from the low pressure column to the argon column, remove argon rich fluid from the top of the argon column, send a liquid air stream at least in part to a top condenser of the intermediate pressure column where it is partially vaporized to form a vapor and a liquid, send the vapor formed in the top condenser of the intermediate pressure column to the low pressure column, and send the liquid from the top condenser of the intermediate pressure column to the intermediate pressure column to be separated. | 10-30-2014 |