초록 ▼

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

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.

대표청구항 ▼

1. 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, wherein the porous lining acts as a contacter between the gas phase and the liquid phase, such t

1. 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, wherein the porous lining acts as a contacter between the gas phase and the liquid phase, such that the initial gas phase-liquid phase mixture is made in the porous lining in which interfaces are created, said porous lining being a medium offering a throughway permitting flow of the liquid phase and the gas phase through the porous lining in order to assure simultaneous mixing of the liquid phase and the gas phase and the generation of a foam, means for inserting the liquid phase and means for inserting the gas phase in said chamber, through the said, at least one, inlet opening, means for creating low pressure in said chamber and aspirating the foam generated in the porous lining through said, at least one, outlet opening, wherein said means for inserting in said chamber the liquid phase, said means for inserting in said chamber the gas phase, and said means for aspirating the generated foam from said chamber are such that the energy required for the mixture of the liquid phase and of the gas phase and for the generation of the foam is provided by the aspirating means. 2. System for placing a foam in circulation in an installation, the installation comprising a first end and a second end, the first and second ends delimiting at least part of the installation in which the foam is to be to in circulation, said system comprising:the foam generation system according to claim 1, and scaled connection means between said, at least one, outlet opening of the chamber and the first end of the installation, said means for aspirating being positioned at the second end of the installation such as to set up a low pressure in said part of the installation in which the foam is to be placed in circulation. 3. System according to claim 1, comprising in addition at least one spray means for spraying the liquid phase in the chamber.4. System according to claim 2, comprising in addition at least one spray means for spraying the liquid base in the chamber.5. System according to claim 3, in which the spray means is a nozzle or grid.6. System according to claim 1, in which the porous lining is made up of a material chosen from among a stack of metal grids, a knitted synthetic fibre, sand, diatoma, perlites, gauged solid beads, and material having interstices.7. System according to claim 2, in which the porous lining is made up of a material chosen from among a stack of metal grids, a knitted synthetic fibre, sand, diatoma, perlites, gauged solid beads, and a material having interstices.8. System according to claim 3, in which the porous lining is made up of a material chosen from among a stack of metal grids, a knitted synthetic fibre, sand, diatoma, perlites, gauged solid beads, and a material having interstices.9. System according to claim 4, in which the porous lining is made up of a material chosen from among a stack of metal grids, a knitted synthetic fibre, sand diatoma, perlites, gauged solid beads, and a material having interstices.10. System according to claim 5, in which the porous lining is made up of a material chosen from among a stack of metal grids, a knitted synthetic fibre, sand, diatoma, perlites, gauged solid beads, and a material having interstices.11. System according to claim 1, in which the insertion means for adding the gas phase to the chamber is at least one inlet opening for ambient atmospheric air.12. System according to claim 1, in which the insertion means for adding a liquid phase to said chamber through at least one inlet opening comprise a measuring pump and flow measurement means.13. System according to claim 11, in which the insertion means for adding a liquid phase to said chamber through at least one inlet opening comprise a measuring pump and flow measurement means.14. System according to claim 1, in which the aspiration means comprise a vacuum pump.15. System according to claim 2, in which the aspiration means comprise a vacuum pump.16. System according to claim 3, in which the aspiration means comprise a vacuum pump.17. System according to claim 4, in which the aspiration means comprise a vacuum pump.18. System according to claim 5, in which the aspiration means comprise a vacuum pump.19. System according to claim 6, in which the aspiration means comprise a vacuum pump.20. System according to claim 7, in which the aspiration means comprise a vacuum pump.21. System according to claim 8, in which the aspiration means comprise a vacuum pump.22. System according to claim 9, in which the aspiration means comprise a vacuum pump.23. System according to claim 10, in which the aspiration means comprise a vacuum pump.24. System according to claim 11, in which the aspiration means comprise a vacuum pump.25. System according to claim 12, in which the aspiration means comprise a vacuum pump.26. System according to claim 13, in which the aspiration means comprise a vacuum pump.27. System according to claim 14, in which the vacuum pump is fitted with a condensate trap.28. System according to claim 15, in which the vacuum pump is fitted with a condensate trap.29. System according to claim 2, comprising in addition a foam collector tank placed at the second end of the installation.30. System according to claim 29, comprising in addition collecting means for the liquid derived from destabilisation of the foam in the foam collector tank, and means for pumping said recovered liquid as far as the insertion means for the liquid phase in the chamber of the foam generation system.31. System according to claim 30, comprising in addition means for the purifying of the recovered liquid, said purification means being placed downstream from the foam collector tank and upstream from the insertion means for the liquid phase into the chamber of the foam generation system.32. System according to claim 6, in which the insertion means for adding the gas phase to the chamber is at least one inlet opening for ambient atmospheric air.33. System according to claim 6, in which the insertion means for adding a liquid phase to said chamber through at least one inlet opening comprise a measuring pump and flow measurement means.34. System according to claim 1, in which the porous lining is made up of a material chosen from among a knitted synthetic fibre, sand, diatoma, perlites, and gauged solid beads.