Method for generating and circulating a foam in an installation and system for application of this method
AssigneeCommissariat a l'Energie Atomique
InventorsBruno Fournel, Maria Faury, Jean-Marie Le Samedy
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Abstract
The invention relates to a method for generating a foam from a liquid phase and a gas phase, a method for placing a foam in circulation in an installation, and a method for cleaning an installation by placing a, foam in circulation. Generation of the foam is made by aspiration of an appropriate liquid phase and an appropriate gas phase to generate a foam through a porous lining. The invention also relates to a system for generating a foam and to a system for generating and placing a foam in circulation in an installation.
Claims22
Method for generating a foam from a liquid phase and a gas phase, comprising a step consisting of generating the foam by aspiration of the liquid phase and of the gas phase through a porous lining.
Method according to any of claims, 1 to 6, in which the liquid phase contains:
- 3 to 6 mol.l−1 sulphuric acid;
- 0.1 to 1% by weight of a viscosing compound,
- 0.2 to 0.5% by weight of betaine,
- 0.3 to 1% by weight of an oligosaccharide alkyl ether, and optionally
- 0.2 to 1% by weight of a destabilising agent.
System for generating a foam comprising:
- a chamber provided with at least one inlet opening and at least one outlet opening,
- a porous lining placed between the inlet and outlet openings of the chamber,
- means for inserting in said chamber a liquid phase and a gas phase through the said, at least one, inlet opening,
- means for aspirating said liquid phase and said gas phase through the porous lining, the generated foam being evacuated from said chamber by said aspiration means through said, at least one, outlet opening.
Dependencies are inferred from the claim text.