Method and device for producing a fluid enriched with carbon dioxide from a waste gas of a ferrous-metallurgy unit
AssigneeL'Air Liquide, Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude
InventorsAlain Briglia, Christophe Szamleski, Olivier De Cayeux, Richard Dubettier-Grenier, Alain Guillard, Xavier Traversac
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Abstract
The present invention relates to a process and apparatus for producing a fluid enriched in carbon dioxide starting from a waste gas from a ferrous metallurgy unit.
Claims16
1-15. (canceled)
A process for the production of a fluid enriched in carbon dioxide starting from a waste gas from a ferrous metallurgy unit (HF) comprising carbon dioxide and carbon monoxide, the process comprising;
- compressing at least a portion of the waste gas in a first compressor,
- drying the compressed waste gas,
- separating the dried waste gas by an adsorption process in an adsorption unit to produce a first gas gas enriched in carbon dioxide and depleted in carbon monoxide and a second gas depleted in carbon dioxide and enriched in carbon monoxide,
- separating the first gas in a separation unit, to produce a fluid enriched in carbon dioxide and a recycling gas comprising carbon monoxide,
- removing the fluid enriched in carbon dioxide as product,
- recycling the recycling gas from the separation unit to the adsorption unit at the inlet pressure of the adsorption unit and
- sending at least a portion of the gas depleted in carbon dioxide to the ferrous metallurgy unit or another ferrous metallurgy unit.
An apparatus for the production of a fluid enriched in carbon dioxide starting from a waste gas from a ferrous metallurgy unit comprising carbon dioxide and carbon monoxide, comprising:
- i) a ferrous metallurgy unit,
- ii) a first compressor in which at least a portion of the waste gas originating from the ferrous metallurgy unit is compressed,
- iii) an adsorption unit where the dried waste gas is separated by an adsorption process to produce a first gas enriched in carbon dioxide and depleted in carbon monoxide and a second gas depleted in carbon dioxide and enriched in carbon monoxide,
- iv) a separation unit where separation is carried out in the first gas, to produce a fluid enriched in carbon dioxide and a recycling gas comprising carbon monoxide, and means for exiting the fluid rich in carbon dioxide as product from the appliance,
- v) a pipe for sending the recycling gas from the separation unit to the adsorption unit, and
- vi) a pipe for sending at least a portion of the gas depleted in carbon dioxide to the ferrous metallurgy unit or another ferrous metallurgy unit.
Dependencies are inferred from the claim text.