Flue gas treatment method
AssigneeALSTOM Technology Ltd
InventorsMichael Charles BALFE, Peter Kniesburges
Life of this patent
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Abstract
The present invention relates to a method and system for cleaning a process gas containing carbon dioxide and contaminants, by bringing the process gas into direct contact with an alkaline solution or slurry, and capturing in the alkaline solution or slurry at least a part of the contaminants of the process gas; and bringing the process gas, depleted in contaminants, into direct contact with a cooling liquid to form a cooled process gas; wherein said alkaline solution or slurry is separate from the cooling liquid.
Claims15
A method of cleaning a process gas containing carbon dioxide and contaminants, said method comprising:
- bringing the process gas into direct contact with an alkaline solution or slurry, and capturing in the alkaline solution or slurry at least a part of the contaminants of the process gas;
- and
- bringing the process gas, depleted in contaminants, into direct contact with a cooling liquid to form a cooled process gas;
- wherein said alkaline solution or slurry is separate from the cooling liquid.
A gas cleaning system for cleaning a process gas containing carbon dioxide and contaminants, said gas cleaning system comprising:
- an alkaline cleaning system comprising a gas-liquid contacting device operative for removing, at least partly, contaminants from the process gas, by bringing the process gas into direct contact with an alkaline solution or slurry, and capturing in the alkaline solution or slurry at least a part of the contaminants of the process gas;
- and
- a cooling system comprising a gas-liquid contacting device operative for cooling the process gas depleted in contaminants by bringing the process gas depleted in contaminants into direct contact with a cooling liquid;
- wherein said alkaline solution or slurry is separate from the cooling liquid.
Dependencies are inferred from the claim text.