Adapting of an oxy-combustion plant to energy availability and to the amount of CO2 to be trapped
AssigneeL'Air Liquide Societe Anonyme pour l 'Etude et l 'Exploitation des Procedes Georges Claude
InventorsPhilippe Court, Arthur Darde, Jean-Pierre Tranier, Patrick Le Bot, Jean-Marc Tsevery
Life of this patent
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Abstract
A carbon fuel combustion process, employing an air gas separation unit, a combustion unit operating either with air or with an oxidizer leaner in nitrogen than air, coming from the air gas separation unit, and a unit for compressing and/or purifying the CO2 coming from the combustion flue gas, wherein the power consumed by the air gas separation unit and/or the flow of oxygen produced by the air gas separation unit and/or the capture of the CO2 coming from the combustion flue gas are variable over time is presented.
Claims28
A process for the combustion of carbon fuel comprising;
- a) providing an air gas separation unit, wherein over a finite period T;
- wherein the electrical power required by the air gas production unit is variable;
- b) providing a combustion unit configured to operate either with air or with an oxidizer leaner in nitrogen than air, the oxidizer leaner in nitrogen than air at least partly coming from the air gas separation unit, the combustion unit producing flue gas containing CO2;
- c) providing a unit for compressing and/or purifying the CO2 in the flue gas, the unit capturing the CO2 from the combustion flue gas, wherein over the finite period T the capture may be is intermittent, wherein the CO2 coming from the CO2 compression and/or purification unit is bottled or it feeds a CO2 line for an industrial usage or an underground storage tank;
- and
- d) operating the combustion unit alternately with air and with the oxidizer leaner in nitrogen than air.
A process for the combustion of carbon fuel comprising:
- a) providing an air gas separation unit, wherein over a finite period T;
- wherein the electrical power required by the air gas production unit is variable;
- b) providing a combustion unit configured to operate either with air or with an oxidizer leaner in nitrogen than air, the oxidizer leaner in nitrogen than air at least partly coming from the air gas separation unit, the combustion unit producing flue gas containing CO2;
- c) providing a unit for compressing and/or purifying the CO2 in the flue gas, the unit capturing the CO2 from the combustion flue gas, wherein over the finite period T the capture may be is intermittent;
- d) operating the combustion unit alternately with air and with the oxidizer leaner in nitrogen than air, wherein the combustion unit has a carbon fuel consumption and said combustion unit &livers power, wherein the carbon fuel consumption by the combustion unit is constant over the period. T, wherein the power delivered by said combustion process is variable over the period T.
A carbon fuel combustion installation comprising;
- a) an air gas production unit;
- b) a combustion unit configured to operate in at least two modes of operation, wherein in a first mode of operation, the combustion unit is configured to operate air and in a second mode of operation, the combustion unit is configured to operate with an oxidizer leaner in nitrogen than air, coming from the air gas separation unit;
- an oxidizer leaner in nitrogen than air, coming from the air gas separation unit;
- c) a unit for compressing and/or purifying the CO2 coming from the combustion flue gas, wherein the operation of these three units is controlled by a computer so that, over a finite period T;
- d) the electrical power required by the air gas production unit is variable;
- and/or
- e) the capture of the CO2 coming from the combustion flue gas, via the CO2 compression and/or purification unit, is intermittent,
- wherein the air gas production unit, the combustion unit and the CO2 compression and/or purification unit are automatically controlled so as to adapt to the variation in energy costs necessary for operating these units.
Dependencies are inferred from the claim text.