Method and apparatus for producing at least one argon-enriched fluid and at least one oxygen-enriched fluid from a residual fluid
AssigneeL'air Liquide Societe Anonyme Pour L'etude Et Expl
InventorJean-Pierre Tranier
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for producing an argon-enriched fluid and an oxygen-enriched fluid from a fluid resulting from a method for purifying of oxy-fuel combustion fumes, wherein said method comprises purifying the residual gas by a purification method in order to produce a gas enriched with carbon dioxide and a residual gas lean in carbon dioxide, pre-treating the residual gas lean in carbon dioxide in order to obtain a flow enriched with carbon dioxide and a flow lean in carbon dioxide, treating the flow lean in carbon dioxide by a cryogenic technique so as to extract at least an argon-enriched fraction, an oxygen-enriched fraction, and a fraction lean in argon and/or oxygen.
Claims27
1-18. (canceled)
A method for producing at least one argon-enriched fluid and at least one oxygen-enriched fluid from a residual fluid resulting from a method for purifying a residual gas, the residual gas containing carbon dioxide and oxygen and/or argon, the residual gas being derived from an installation supplied with oxygen containing argon, which is an oxy-fuel combustion installation, comprising the following steps:
- recovering fumes resulting from the oxy-combustion of a fuel by means of a gas rich in oxygen and in carbon dioxide and containing argon in the combustion chamber of a boiler as they leave the boiler,
- purifying the fumes by a low-temperature purification method, so as to produce a first stream enriched with carbon dioxide and a residual fluid depleted of carbon dioxide;
- pre-treating the residual fluid depleted of carbon dioxide in order to obtain a second stream enriched with carbon dioxide and a stream lean in carbon dioxide;
- and
- cryogenically treating the stream lean in carbon dioxide so as to extract therefrom at least one fraction enriched or rich in argon and at least one fraction enriched or rich in oxygen and at least one fraction depleted of argon and/or oxygen.
An installation for producing at least one argon-enriched fluid and at least one oxygen-enriched fluid from a residual fluid resulting from a method for purifying a residual gas, the residual gas containing carbon dioxide and argon and/or oxygen, the residual gas being derived from an installation supplied with oxygen containing argon, which is an oxy-fuel combustion installation, comprising:
- a unit for purifying the residual gas, comprising fumes leaving a boiler for oxy-combustion of a fuel by means of a gas rich in oxygen and carbon dioxide, in which case the purification unit may be a low-temperature purification unit so as to produce a fluid enriched with carbon dioxide and a residual fluid depleted of carbon dioxide;
- a unit for pretreatment of the residual fluid in order to obtain a flow enriched with carbon dioxide and a flow lean in carbon dioxide;
- and
- a unit for cryogenic treatment of the flow lean in carbon dioxide so as to extract therefrom a fraction enriched with argon, a fraction enriched with oxygen and a fraction depleted of argon and/or oxygen.
Dependencies are inferred from the claim text.