Abstract: A method for separating air is provided, in which a flow of oxygen-rich liquid is sent to a top of a pure oxygen column, having a pure oxygen reboiler, in which said flow is purified in order to form a vessel liquid containing at least 98 mol % of oxygen and the vessel liquid is drawn off as a product. A supercharged airflow at a second pressure is sent to the pure oxygen reboiler and to a liquid oxygen vaporizer; a nitrogen-rich gas is drawn from the top of the medium-pressure column and sent to an intermediate reboiler of the low-pressure column and the condensed gas is sent to the top of the medium-pressure column; and a nitrogen-rich gas or air is sent to a vessel reboiler of the low-pressure column and the liquid that condenses therein is sent to the medium-pressure column.

Abstract: Device for separating air comprises a pipe for withdrawing liquid oxygen from the low-pressure column and for sending it to a first pump, a pipe for sending liquid oxygen that has been pressurized to a pressure of below 9 bar as from the first pump to a vaporizer, a pipe for sending gaseous oxygen from the vaporizer to a main exchanger Where it is heated up, a pipe for sending liquid oxygen for purging from the vaporizer to a second pump to pressurize it and a pipe for sending the pressurized oxygen from the second pump to an exchanger where it vaporizes to form gaseous oxygen.

Abstract: An apparatus for compressing air and producing a carbon dioxide-rich fluid includes an air compressor, an element for bringing the air bound for the air compressor into contact with water to produce humidified air and cooled water, a pipe for sending the humidified compressed air from the air compressor to an installation producing a carbon dioxide-rich gas, a carbon dioxide-rich gas compressor for compressing the carbon dioxide-rich gas, at least one heat exchanger upstream and/or downstream the carbon dioxide-rich gas compressor and pipes for conveying into the heat exchanger water cooled in the contact element and the carbon dioxide-rich gas.

Abstract: In a process for delivering pressurized gas from an apparatus for separating air by cryogenic distillation, a stream of oxygen-rich liquid or gas having a nominal flow rate is withdrawn from a low-pressure column, an oxygen-rich liquid purge stream is withdrawn as bottoms from the low-pressure column and the oxygen-rich liquid purge stream is sent to a storage tank, in the event of a reduction in the production by the column system or an increase in the demand by a customer, a back-up stream is withdrawn from the storage tank and vaporized in a back-up reboiler and only if the liquid level in the storage tank exceeds a given threshold, a liquid stream is withdrawn from the storage tank constituting at most 2% of the nominal production output of the oxygen-rich stream and is sent to the back-up reboiler.

Abstract: In a process for separating air by cryogenic distillation, an oxygen-rich stream having a first oxygen purity of less than 98 mol % oxygen is withdrawn from the column system and sent to a customer, an oxygen-rich liquid stream having a second oxygen purity, possibly lower than 98 mol % oxygen, is sent to a storage tank, liquid is periodically withdrawn from the storage tank and sent to a back-up reboiler, to produce a back-up product, and a liquid stream having a third oxygen purity, lower than the first purity, is withdrawn from the bottom of at least one column of the column system and/or from the auxiliary reboiler and sent to the storage tank as a purge stream during a stoppage in the operation of the column system.

Abstract: The invention relates to a method for treating a gas stream comprising combustion fumes containing CO2 in an initial proportion, water vapor, one or more volatile acid compounds, and one or more additional impurities selected from among oxygen, nitrogen and argon, comprising the steps of: i) compressing the gas stream to a final pressure of 1 bar to 74 bar absolute; ii) cooling the gas stream to a temperature of around ?10° C. to around ?130° C. and eliminating at least one additional impurity; and iii) recovering a CO2-enriched gas stream containing a final proportion of CO2 greater than the initial proportion of CO2 in the stream to be treated. In addition, the method comprises, prior to step i), a step of pre-drying the stream for removing therefrom at least a portion of the water vapor which it contains.

Abstract: In a method for separating air in a column system, by cryogenic distillation, compressed, purified and cooled air is separated in the column system in order to form an oxygen-enriched flow and a nitrogen-enriched flow. At least one column of the column system contains a vaporizer-condenser for ensuring the vaporization of a liquid enriched in oxygen in relation to the air by means of heat exchange with a calorigenic fluid, the calorigenic fluid having been compressed upstream of the vaporizer-condenser in a compressor having a cryogenic inlet temperature, the calorigenic fluid being at least partially condensed in the vaporizer-condenser, and a cryogenic liquid is added to the calorigenic fluid upstream of the vaporizer-condenser.

Abstract: An air separation unit having a medium-pressure column, a low-pressure column, a chamber, a heat exchanger, a bottom condenser of the low-pressure column and a condenser placed in the chamber is provided. The air separation unit also includes an expansion device configured to expand oxygen-rich liquid from the bottom of the low-pressure column before the oxygen-rich liquid is introduced to the chamber and a compressor configured to compress the gas from the chamber, wherein the compressor is downstream of the chamber and upstream of the low-pressure column.

Abstract: The invention relates to a method for compressing and cooling air upstream from a facility for cryogenic separation of air, with no means for exchange by indirect heat, in which humid air is compressed in a compressor, the air compressed in the compressor is cooled in a first exchanger having indirect heat exchange, water is recovered from the air upstream and/or downstream from cooling in the first exchanger, the air cooled in the first exchanger is sent to a purification unit in order to produce air purified of carbon dioxide and/or water, the purified air is sent to the cryogenic separation facility, and at least one gas is recovered from the cryogenic separation facility.

Abstract: The invention relates to a method for purifying a feedstock gas flow including a main compound, water (H2O) and carbon dioxide (CO2) as well as so-called secondary impurities, that comprises: a) feeding the feedstock gas flow into at least one 2-grid radial adsorber comprising as a single adsorption bed an activated alumina or silica gel bed on which H2O is preferably adsorbed; b) feeding the gas resulting from step a) into at least one 2-grid radial adsorber comprising as a single adsorption a molecular sieve bed on which CO2 and secondary impurities are preferably adsorbed; and c) recovering a gas resulting from step b) enriched with the main compound and suitable for cryogenic distillation.

Abstract: A method and apparatus for providing nitrogen is provided.

Abstract: A method and to an apparatus for producing oxygen by separating air using cryogenic distillation is presented.

Abstract: A method and a plant for producing a cooled compressed syngas is presented.

Abstract: A unit for separating air using cryogenic distillation is provided.

Abstract: An air distillation unit comprises an air distillation column (10) suitable for producing a nominal flow of gaseous nitrogen, the top of said column being connected to a liquid nitrogen source (8), and operates by carrying out the following steps: a flow of compressed, cooled and purified air is sent to an exchanger (11) and then to the column, a flow of gaseous nitrogen is withdrawn from the column, the level of liquid at the bottom of the column is controlled; and injection liquid (20), sent from the source to the column, is no longer sent if the required production reduces to at most the nominal production. Application to the separation of air by cryogenic distillation.

Abstract: An oxycombustion apparatus comprising an air separation unit (2) in which oxygen (10) is produced optionally by cryogenic distillation, an oxycombustion boiler (1), means for sending the oxygen and a fuel (14) to the oxycombustion boiler, means (19) for recovering carbon dioxide-containing flue gases from the oxycombustion boiler, and means (7) for purifying the flue gases in order to extract carbon dioxide therefrom, the air separation unit being provided for producing oxygen to be sent to the boiler having a purity not exceeding 95 mol %.

Abstract: The invention relates to an air separating device by means of cryogenic distillation for producing nitrogen, comprising an exchange line (3), a simple distillation column (7) containing plates and/or structured packings, a supply line for delivery of compressed purified air (1) to the exchange line, a supply line for delivery of the compressed purified and cooled air from the exchange line to the distillation column, a line for withdrawal of a liquid (11) enriched in oxygen from the distillation column for delivery to the exchange line, said exchange line having two sections, a rectifying section (3B) and a heat exchange section (3A), the rectifying section being connected to the column and the line for the enriched liquid and the heat exchange section is connected to the air supply line and the rectifying section.

Abstract: An apparatus and method of use for treating at least one fluid, in a container that holds at least one mass of a particulate material between two perforated walls. Near the upper part of the mass, at least one deflector extends from the first wall towards the second wall. Fluid flows through the walls horizontally, and the deflector is positioned at an angle to this horizontal fluid flow direction. With this particular apparatus configuration, an area close to the second wall and opposite the adjacent end of the deflector is formed, which is generally free of particulate matter; thus, resulting in a more efficient treatment process.

Abstract: An apparatus and method of use for treating at least one fluid, in a container that holds at least one mass of a particulate material between two perforated walls. Near the upper part of the mass, at least one deflector extends from the first wall towards the second wall. Fluid flows through the walls horizontally, and the deflector is positioned at an angle to this horizontal fluid flow direction. With this particular apparatus configuration, an area close to the second wall and opposite the adjacent end of the deflector is formed, which is generally free of particulate matter; thus, resulting in a more efficient treatment process.

Abstract: A reboiler/condenser bath heat exchanger for heat exchange between a first fluid to be vaporized and a second fluid to be condensed includes a number of passages for heat exchange between the two fluids in order to make the second fluid flow, which fluid has a temperature of T2-2 at the outlet of the passages; a vessel containing the passages for making the first fluid flow between the passages by thermosiphon effect from the bottom upwards over a height h, the first fluid having an entry temperature T1-1 where T1-1<T2-2 and an exit pressure P1-2; elements for giving the entry pressure P1-1 of the first fluid a value such that the pressure P1-2 is greater than a minimum pressure Pm,ex and elements for ensuring that at least one of the following two conditions is fulfilled: the height h of the passages is at least equal to 2.5 m; and the temperature T2-2 of the second fluid is less than T1-1+1.2° C.