Process and apparatus for cooling and compressing a wet gas rich in carbon dioxide
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsAlain Briglia, Philippe Court, Arthur Darde
Life of this patent
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Abstract
In a cooling and compressing process, a wet feed gas (1) that is rich in carbon dioxide is scrubbed with water and with an antifreeze agent in a column (3) in order to produce a flow of gas that is rich in carbon dioxide, water-depleted and cooled, the flow of gas rich in carbon dioxide is compressed in a compressor (20) and a liquid rich in carbon dioxide (18) is vaporized in order to cool the water and antifreeze agent before sending them to the scrubbing operation, it being possible for the liquid to originate from an external source.
Claims9
A process for cooling and compressing a gas rich in carbon dioxide comprising:
- i) cooling a mixture against a liquid rich in carbon dioxide, wherein the mixture comprises water and an antifreeze agent, wherein the liquid rich in carbon dioxide vaporizes to form a carbon dioxide rich gas:
- ii) cooling a wet feed gas, which is rich in carbon dioxide, with the mixture in a column in order to produce a flow of gas rich in carbon dioxide;
- and
- iii) compressing the flow of gas rich in carbon dioxide in a compressor;
- and
- iv) mixing the carbon dioxide rich gas formed in step i) with the flow of gas rich in carbon dioxide at a location that is selected from the group consisting of downstream the compressor, at an inter-stage of the compressor, at the head of the column, and combinations thereof,
- wherein the liquid rich in carbon dioxide originates from a source selected from the group consisting of an external source, a liquid produced by or derived from liquefaction of the flow of gas rich in carbon dioxide compressed in the compressor, and combinations thereof.
An apparatus for cooling and compressing a gas rich in carbon dioxide, the apparatus comprising:
- a column configured to cool a mixture of water and an antifreeze agent, wherein the column is further configured to cool a wet feed gas that is rich in carbon dioxide in order to produce a flow of gas rich in carbon dioxide, wherein the flow of gas rich in carbon dioxide is also water-depleted and cooled as compared to the wet feed gas;
- a compressor;
- a duct configured to send the flow of gas rich in carbon dioxide from the column to the compressor such that the compressor is configured to compress the flow of gas rich in carbon dioxide;
- a heat exchanger;
- a duct configured to send the mixture of water and antifreeze agent to the heat exchanger upstream of the column;
- a duct configured to send a liquid rich in carbon dioxide to the heat exchanger in order to cool the mixture of water and antifreeze agent, wherein the liquid rich in carbon dioxide originates from a source selected from the group consisting of an external source, a liquid produced by or derived from liquefaction of the flow of gas rich in carbon dioxide compressed in the compressor, and combinations thereof;
- a means for sending a carbon dioxide rich gas formed in the heat exchanger via vaporization of the liquid rich in carbon dioxide and means for mixing the carbon dioxide rich gas formed in the heat exchanger with the flow of gas rich in carbon dioxide at a location that is selected from the group consisting of downstream the compressor, at an inter-stage of the compressor, at the head of the column, and combinations thereof.
Dependencies are inferred from the claim text.