EP1047490B1 - Procede de generation et de mise en circulation d'une mousse dans une installation et dispositif pour la mise en oeuvre de ce procede - Google Patents
Procede de generation et de mise en circulation d'une mousse dans une installation et dispositif pour la mise en oeuvre de ce procede Download PDFInfo
- Publication number
- EP1047490B1 EP1047490B1 EP99900935A EP99900935A EP1047490B1 EP 1047490 B1 EP1047490 B1 EP 1047490B1 EP 99900935 A EP99900935 A EP 99900935A EP 99900935 A EP99900935 A EP 99900935A EP 1047490 B1 EP1047490 B1 EP 1047490B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- foam
- installation
- liquid phase
- liquid
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/235—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids for making foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
- B01F25/4524—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls
- B01F25/45241—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through foam-like inserts or through a bed of loose bodies, e.g. balls through a bed of balls
Definitions
- the invention relates to a method of generating of a foam from a liquid phase and a gas phase, to a circulation process of a foam in an installation and a method of cleaning a plant by putting into circulation of a foam.
- the invention also relates to a device of generating a foam and a device for generation and circulation of a foam in an installation.
- the method of the invention may be useful for example in a cleaning process and / or decontamination of an installation by a foam.
- the cleaning and / or liquid phase decontamination of a large volume having for example a geometry internal complex generate volumes of effluents important.
- the use of a foam, containing one or several cleaning reagents and / or decontamination allows a significant decrease volumes of effluents generated.
- Cleaning and / or decontamination of an installation is carried out by injection of the foam inside the installation clean and / or decontaminate and sometimes by circulation of foam in these facilities.
- the method of the invention is particularly advantageous for cleaning and / or decontamination of installations operating in depression such as a pneumatic transport network of samples intended for to analyzes, a ventilation circuit or a conduct, having undergone radioactive contamination.
- Foam generation is usually done by mechanical agitation of a liquid, by expansion brutal gas solubilized in a liquid, or by injection of gas and liquid under pressure at the entrance of a static porous medium.
- patent application EP-A-0 526 305 describes on the one hand a process for preparing a foam of passing a gas under pressure to through a sintered plate in the presence of a solution, the solution and the gas being suitable for forming a foam.
- the document cited above also describes a method of cleaning an installation in which the foam is propelled into the installation by the gas pressure used to generate the foam.
- the flow of gas and liquid are set to generate the foam, at the entrance of the installation, independently characteristics of said installation to be cleaned.
- the process of preparing a foam and cleaning of an installation described in this document are not suitable for cleaning sensitive installations, in particular of installations for which pressure above atmospheric pressure is prohibited.
- the present invention aims to provide a method of generating a foam from a phase liquid and a gas phase to generate a homogeneous foam with few or no pockets air.
- the method of the invention is characterized in that that it includes a step of generating the foam by aspiration of the liquid phase and the phase gas through a porous lining.
- the principle of the method of the invention consists in no longer inject liquid and gaseous phases under pressure in the porous lining, but to drain them through the pores or interstices of the packing, in establishing a constant depression downstream of this packing.
- the gaseous phase and the liquid phase are sucked simultaneously through the lining under the effect of the Depression.
- the porous lining therefore acts as a contactor between the gas phase and the liquid phase.
- the gas phase-liquid phase mixture is produced in the porous lining in which there is creation interfaces and therefore foam.
- the energy needed for mixing and creating interfaces is brought by the flow of the liquid and gaseous phases in the packing under the effect of depression.
- the chemical composition of the foaming solution is chosen according to the use to which it is intended for the generated foam.
- the foam can for example a cleaning foam, and / or decontamination of an installation, and / or a foam of degreasing, a rinsing foam, a foam intended for to apply a film with properties by example surfactants or bactericidal.
- a foam of constant quality will have a constant abundance.
- mosses prepared by the methods of the prior art present an abundance of about 10 to 15.
- the expansion also provides an order of magnitude of the value of the decrease in the volume of effluents generated liquids for example when the foam is used to clean an installation.
- the abundance also makes it possible to evaluate the amount of air pockets present in the foam, and therefore to evaluate the quality of this foam.
- the phase liquid may comprise in addition to at least one agent foaming surfactant conventionally used to generate a foam, at least one stabilizing agent or destabilization of a foam allowing to modify the lifetime of the foam and its moisture content, and / or at least one cleaning agent and / or at least one agent decontamination and / or at least one agent degreasing of an installation.
- the liquid phase can be an aqueous solution of at least one surfactant and at least one destabilizing agent of the foam.
- the constituents of the liquid phase in particular the agent of destabilization of the foam, and their quantity are chosen so as to obtain a lifetime of the foam 15 to 30 minutes and a humidity of 2 to 20%.
- the destabilizing agent can be a compound organic which destabilizes the foam by acting on the dynamic surface tension, for example an alcohol preferably having a boiling point slightly greater than that of water, for example a point boiling point 110 ° C to 130 ° C.
- a secondary alcohol C5 or C6 such as pentanol-2.
- the amount of agents destabilization represents 0.2 to 1% by weight of the liquid phase.
- the reagent of decontamination can consist of the reagents usually used in wet decontamination.
- reactants consisting of acids or inorganic or organic bases.
- acidic reagents include hydrochloric acid, nitric acid, sulfuric acid and acid which may be used alone or in combination with combination.
- Reagents can also be used organic, such as citric and oxalic acids.
- NAOH NAOH
- KOH KOH
- oxidants such as H 2 O 2 or the permanganate ion.
- their concentration in the liquid phase can be up to 10 mol.l -1 , for example, when it comes to basic reagents, their concentration can range up to 5 mol, for example. .l -1 .
- a viscosity compound such as polyethylene glycol, for example polyethylene glycol, is preferably added to the liquid phase.
- the sulfuric acid accelerates a phenomenon of direct decantation of the liquid phase through the interface separating the gas bubbles from the foam, but this can be slowed down by means of this viscosity compound.
- the concentration of viscous compound the liquid phase does not exceed 1% by weight.
- the liquid phase of the foam also includes less a surfactant promoting the formation of the foam, preferably two agents are used surfactants each consisting of betaine in particular a sulfobetaine and an ether alkyl oligosaccharide.
- two agents are used surfactants each consisting of betaine in particular a sulfobetaine and an ether alkyl oligosaccharide.
- the association of these two surfactants is interesting because it remains surfactant whatever the pH and therefore also suitable well in a neutral environment, for example for a rinse of an installation, whether in an acidic or basic environment, that is to say with the decontamination reagents acidic or basic.
- the betaine concentration is 0.2 to 0.5% by weight and the concentration in ether
- the alkyl oligosaccharide is 0.3 to 1% by weight.
- a sulfobetaine can be used such as that sold by the company SEPPIC under the trade name AMONYL (registered trademark).
- alkyl ether of oligosaccharide useful as a second surfactant we can mention the one sold by the company SEPPIC under the trade name ORAMIX CG110 (registered trademark), and sold by the company ROHM and HASS under the name commercial of TRITON CG60 (registered trademark).
- the levels of surfactants and / or stabilizing agents or destabilizers are chosen according to the duration of life of the foam that you want to get.
- the levels of Decontamination and / or cleaning reagents are chosen according to the nature of the objects to decontaminate and / or clean as well as the type and degree of decontamination and / or desired cleaning.
- Another variable involved in the quality of the foam generated according to the process of the invention is the flow of the liquid phase coming into contact with the porous packing.
- This flow can be fixed using a dosing pump.
- the flow rate of the liquid phase is adjusted depending on the flow rate of the gas phase and the aspiration of the liquid and gaseous phases through the porous packing.
- the flow of the liquid phase must also be adjusted according to the porous packing in particular of the pore size of this lining.
- the quality of the foam can also depend on the the way in which the liquid comes into contact with the porous lining; indeed, by promoting the arrival in contact with the porous lining the creation coarse foam, we increase the quality of the generated foam. So there is an influence of the mode spraying the liquid on the surface of the lining may lead to more distribution or less homogeneous of it.
- the arrival of the phase liquid in contact with the lining can be achieved by example by means of a spray nozzle, or in interposing a grid between the arrival of the phase liquid in the enclosure and the porous lining, that is to say above the porous lining.
- depression downstream of the porous filling this depression causing the aspiration of the liquid and gaseous phases through the porous packing.
- value of the flow of generated foam is a function of this downstream depression porous packing.
- depression chosen should take into account the loss of pressure in the porous lining. For this reason, one can control the flow of foam at the outlet of the lining porous using a flow meter, and you can adjust the value of this flow rate by means of a control system of depression.
- This lining can be any medium offering a passage allowing a flow of the liquid phase and the gas phase through the porous lining so to ensure their mixing.
- the pore openings of the porous lining can preferably be evenly distributed in the volume of the lining, these openings will preferably be of dimension low, for example from 100 ⁇ m to a few mm, in order to promote the mixing of the gas phase and the phase liquid and avoid the appearance of air pockets in the foam. However, too fine pores can cause significant pressure losses.
- the porous lining can be choice of a stack of metal grids, a fabric synthetic knit of the FORAFLON type (registered trademark), sand, diatomites or pearlites, balls calibrated solids, or any other material presenting adequate interstices to generate a foam.
- calibrated balls for example balls of calibrated glass.
- the value of the loss of pressure in the porous medium can thus be precisely and reproducibly controlled by the thickness of the bed of balls and the diameter of the balls.
- a bed of calibrated glass beads can initially be based on two relationships classics valid for incompressible fluids, homogeneous and Newtonian.
- the factor B expressed in m 2 is called permeability. This factor is characteristic of the porous medium and depends on its geometry.
- the KOZENY-CARMAN model allows calculate the permeability B of a porous medium consisting of calibrated spheres.
- the mathematical expression of this model will not be detailed here. We will remember that in the case of an incompressible Newtonian fluid, the permeability is inversely proportional to the square the diameter of the spheres making up the bed.
- the depression downstream of the porous lining can be from 5 ⁇ 10 3 to 80 ⁇ 10 3 Pa, preferably from 30 ⁇ 10 3 to 60 ⁇ 10 3 Pa.
- the enclosure can be covered by means of a cover having at least one opening allowing the gas inlet chosen for the development of the foam, or be open air in case the gas used to generate the foam is the ambient air.
- the flow foam at the outlet of the porous lining will be also function of the geometry of the enclosure.
- the method of the invention makes it possible to generate mosses having an abundance of 5 to 40.
- the gaseous phase for the process of the invention can be air, nitrogen, oxygen, a neutral gas such as argon or helium that can be used alone or in combination.
- the invention also relates to a method of putting a foam into circulation in an installation comprising a step of generating a foam by aspiration of a liquid phase and a phase gaseous gases through a porous level of a first end of the installation of such that the generated foam is introduced in said facility and flows through it to a second end of the installation, aspiration being achieved by creating a depression in said installation from said second end.
- the depression created in installing from said second end is at the origin of the aspiration of the liquid phases and gas through the porous lining and then putting in circulation of the foam in the installation.
- this method of setting circulation of a foam in an installation can be applied to a cleaning process a installation by a cleaning foam.
- the sentence liquid then comprises one or more agents cleaners.
- the liquid phase can furthermore comprise a degreasing agent.
- the cleaning foam can be in addition a decontaminating foam, this one comprises then one or more decontaminants.
- decontaminating agents may be for example radioactive decontamination agents or bacterial following the installation to be cleaned.
- the foam can be received in a receiving tank, from the second end of the enclosure, and destabilized naturally, chemically and / or mechanically.
- Natural destabilization achieves by the use of a foam having a duration of limited life, chemical destabilization is made by adding to the foam, in this tank of receiving a destabilizing agent cited previously, and mechanical destabilization can be realized for example by means of a generator ultrasound, a centrifuge or a turbine fins.
- the method may further comprise the steps of collecting the foam from the second end of the installation, to destabilize the foam collected in order to obtain a liquid, and use at least a portion of said liquid as a phase liquid to generate the foam put into circulation in said installation.
- This embodiment can also be called recycling mode.
- the liquid can be purified before to be used as a liquid phase to generate the foam.
- This purification aims, for example, in the case of cleaning processes and / or decontamination of an installation to eliminate wastes driven by the circulation of foam in installation.
- This purification can be carried out by for example, by means of adequate filters.
- the enclosure can have any shape, for circular example, and consists of a material that can be chosen according to the porous filling, the liquid phase, and the gas phase used, and depending on the depression applied to generate the foam.
- This enclosure is preferably waterproof.
- the enclosure can be "open sky".
- porous lining that can be used is previously described.
- the means of introduction into said enclosure by at least one inlet opening of a liquid phase can for example include a metering pump to introduce into the enclosure the phase liquid, this pump can be provided with a means of flow measurement of this liquid phase for example a flowmeter.
- This pump can be connected to a tank of preparation and storage of the liquid phase.
- a spray nozzle or a grid may be used, preferably a spray nozzle.
- This nozzle or grid in ensuring a good distribution of the liquid, allow to promote from the entry of the liquid phase on the porous filling creating a coarse foam on top of this lining thus increasing the quality generated foam.
- the means to introduce into the said pregnant the gas phase can include means regulating the gas introduction pressure in said enclosure and optionally a reservoir of said gas.
- the aspiration of the liquid and gaseous phases to through the porous packing causes the suction of the ambient air, it can then be provided on the enclosure, upstream of the porous lining, at least one opening Ambient atmospheric air inlet equipped possibly a flowmeter.
- the suction means of said liquid phase and of said gas phase through the porous lining, or means to create depression may be by example a vacuum pump possibly equipped with a condensate trap, this pump can realize evacuating from said enclosure the foam generated.
- the device may be provided with a valve or a solenoid valve for fixing and regulating the depression downstream of the lining in the enclosure.
- the device according to the invention can also be provided means for measuring the depression in said pregnant.
- the device for circulating a foam in a facility is particularly advantageous to clean and / or to decontaminate said installation.
- the enclosure, the lining, the means introducing into said chamber the liquid phase and the means for introducing into said enclosure the gas phase may be those described above.
- the sealed connection means may for example be gaskets that will be designed to ability to resist the chemical composition of the foam generated, and the depression needed to generate the suction foam from the liquid and gaseous phases to through the porous lining.
- the suction means of the liquid phase and gaseous through the porous and creative lining of the depression in the said part of the installation in which the foam must flow may be those previously described and may further include a condensate trap.
- This device can also include means of adjustment and measurement described previously.
- the device for generating a foam and putting a foam into circulation in an installation according to the invention may also include a foam flowmeter placed downstream of the porous lining of to be able to measure the amount of foam generated and regulate the depression in the installation and flow rates of the gaseous and liquid phases in the enclosure.
- This device may further comprise a tank of receiving the foam placed at the level of the second end of the installation. It can also include a pressure sensor, draining or recovering a liquid phase destabilization of said foam.
- the device can comprise in addition means for recovering a liquid from of a destabilization of the foam in the tank of receiving the foam, and means for pumping said liquid to the introduction means of the phase liquid in the enclosure of the generating device the foam.
- This device can then include valves isolation, a pumping system of this liquid from the tank for receiving the foam into the tank of preparation and storage of the liquid phase used to generate the foam. Said liquid can then be reintroduced, by the means of introduction of the phase liquid, in the enclosure containing the lining porous, for example by a dosing pump, from the preparation and storage tank of the phase liquid.
- the device can then operate in single pass mode or in recovery.
- the foam is received and stored in a receiving tank that can include means to destabilize the foam to accelerate the return to the liquid form.
- Destabilization can be natural, or be accelerated for example using a mechanical device such as those described previously and / or chemically adding by example a destabilizing agent such as alcohol.
- the vessel can then be emptied by means of a valve, continuous or periodically.
- recovery mode In recovery mode, called still mode recycling, the liquid resulting from the destabilization natural or accelerated foam, after a first passage in an installation for example to decontaminate and / or clean, is recovered periodically or continuously from the receiving tank to the means of a recovery pump, or pump of recycling, and reinjected into the preparation tank and storage of the liquid phase connected to the pump metering of the liquid phase.
- the mode of operation in recycling is particularly preferred for a industrial application of the decontamination system offers.
- a means of purifying the recovered liquid may be placed downstream of the receiving tank of the foam and upstream of the means of introduction of the liquid phase in the enclosure of the device generation of the foam, for example from the tank of preparation and storage of the liquid phase.
- Figure 1 schematically illustrates a mode of embodiment of a device 1 for generating a foam according to the invention comprising an enclosure 3, a porous packing 5 disposed in said enclosure 3, means 9 and 11 for introducing into said pregnant a liquid phase and a gaseous phase, respectively, suitable for generating a foam, and suction means of said liquid phase and of said gas phase through the porous lining 5, the generated foam being removed from said enclosure 3 by these suction means.
- the porous lining 5 consists of balls of calibrated glass, leaving gaps 7 across which the liquid phase percolates.
- Means 9 and 11 allow to introduce in the enclosure a liquid phase and a gaseous phase, respectively and in particular the means 9 of introducing the liquid phase into the enclosure comprises means for spraying 13 of the liquid phase in the enclosure, on the porous lining.
- Figure 2 schematically illustrates a device cleaning a plant 20 with a foam, facility 20 includes a first end 20a and a second end 20b, the first end 20a and the second end 20b delimiting the part of installation 20 to be cleaned by the foam.
- the device cleaning device comprising a generation device 1 of a foam as described above, means of sealed connection between the generation device 1 foam and the installation to be cleaned, and means 30, 32 and 34 to create a depression in said installation.
- the means 30, 32 and 34 are respectively a pressure sensor, a valve isolation and pressure regulation and a vacuum pump charged to create depression in the installation 20 and the device 1.
- This cleaning device also includes a reservoir 44 for preparation and storage of the phase liquid.
- a metering pump 48 makes it possible to take using a dip pipe 46 the liquid phase in this tank 44 and drive this liquid phase to the device 1 foam generator.
- a flowmeter 50 is placed upstream of the device foam generator to control the flow of the liquid phase introduced into this device 1.
- This cleaning device is also provided an isolation valve 24 disposed between the device 1 and the installation 20, of a foam flowmeter 22 arranged between the valve 24 and the installation 20, and of a receiving tank 26 of the foam at the level of second end 20b of the installation 20.
- the receiving vessel 26 of the foam comprises a valve 36 for setting the atmospheric pressure of installation.
- the foam after being generated in the device 1 by suction of the liquid phases and appropriate gas through the porous lining thanks to the vacuum pump 34, passes through the installation 20 from the first end 20a and then from the second end 20b is conducted using a piping 28 plunging to the bottom of the tank of reception 26.
- the foam can be stored in this receiving tank 26 and being destabilized by an agent chemical destabilization and / or device such as those mentioned above for accelerate its return to the liquid form.
- the tank can then be drained by a valve 38.
- the foam is destabilized chemically and / or mechanically in the receiving tank 26, to form a liquid which by so-called recycling or recovery means is carried back to the means 9 of spraying, this liquid again forming the liquid phase of a foam.
- These recycling means include, for example a valve 38, a pump 42 recycling, and 40, leading this liquid into the reservoir 44 for preparation and storage of the phase liquid to be carried back by means of a pipe plunger 46, a metering pump 48, and a flowmeter 50 in the device 1.
- This second embodiment of the invention, or recycling mode, is particularly preferred for a industrial application of a system of decontamination and / or cleaning according to the invention.
- the device may further comprise a purification device 52 of the outgoing liquid effluent of the receiving tank 26, by which the liquid transits, to be cleaned of cleaning waste and / or decontamination, before reaching the tank 44 storage.
- the entry and the exit of the effluent liquid in the purification device 52 can be controlled for example by means of valves 53.
- the speaker used in these examples for the generation of a foam has an internal diameter of 30 mm, and the installation is a cylindrical pipe of inner diameter substantially identical to that of the enclosure.
- the porous lining is a bed of glass balls, spherical, 1.6 mm in diameter and the cylindrical pipe has a length of 4 m. Tests were carried out with two z-bed thicknesses of 0.05 m and 0.08 m respectively, and at a constant depression of 15 ⁇ 10 3 Pa.
- the velocity of the foam V m was measured in ms -1 as a function of the liquid phase flow rate Ql passing through the porous liner in l / h.
- Figure 3 is a graph illustrating these results, on which the columns 60 a, 60 b, 60 c, 62 a, 62 b and 62 c show the same reference tests, V m the speed of foam in m / s and z the thickness of the bed of balls in m.
- the diameter of the glass balls of the porous packing is 3 mm or 1.6 mm
- the thickness of the packing z is 0.08 m
- the depression is constant at 15 ⁇ 10 3 Pa
- the length of the cylindrical pipe of 4 m.
- the velocity V m of circulation of the foam is measured in m / s in the cylindrical pipe.
- liquid and gaseous phases used are the same as those described for Example 1.
- Table 2 below groups the results of the measurements in this example.
- TESTS 70 a 70 b 70c 70 d 62 a 62 b 62 c DIAMETER OF POROUS TRIM BEADS (mm) 3 3 3 3 3 1.6 1.6 1.6 THICKNESS OF BED z (in m) 0.08 0.08 0.08 0.08 0.08 0.08 0.08 Ql in l / h 5 10 15 20 5 10 15 V m (m / s) 0.15 0.14 0.14 0.17 0,021 0,027 0,030
- Figure 4 is a graph illustrating these results on which the references 70 ad and 62 ac correspond to those given in the tests in Table 2.
- liquid and gaseous phases used are the same as those described in the previous examples and the length of the pipe cylindrical is 4 m.
- the tests of this example are carried out for two thicknesses z of the porous packing: 0.08 m (tests 80) and 0.11 m (tests 82).
- the diameter of the balls of the porous packing is 0.003 m for all the tests and the depression is constant at 15x10 3 Pa.
- the speed of circulation of the foam observed for each group of tests is constant: either 0.15 m / s for the 80 tests; and 0.12 m / s for tests 82.
- Figure 5 is a graphical representation of Table 3 results, on which the references 80 and 82 correspond to tests 80 and 82, respectively.
- Example 2 the liquid and gaseous phases of Example 1 are used, the cylindrical pipe has a length of 15 meters, the diameter of the balls is of 0.003 m and the thickness of the porous lining is 0.08 m.
- Figure 6 is a graphical representation of Table 4 results.
- This point A corresponds to the minimum vacuum ⁇ P in the circuit measured with respect to the atmospheric pressure, from which the foam exhibits a Newtonian-type rheological behavior.
- ⁇ P 43 ⁇ 10 2 Pa.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Gas Separation By Absorption (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
- F = le foisonnement en unité de foisonnement,
- Vgaz = le volume de la phase gazeuse dans la mousse,
- Vliquide = le volume de la phase liquide dans la mousse,
- Vmousse = le volume de la mousse.
- de 0,2 à 0,5% en poids de bétaïne,
- de 0,3 à 1% en poids d'éther alkylique d'oligosaccharide, et éventuellement
- de 0,2 à 1% en poids d'un agent de déstabilisation.
- 3 à 6 mol.l-1 d'acide sulfurique,
- 0,1 à 1% en poids d'un composé viscosant,
- 0,2 à 0,5% en poids de bétaïne,
- 0,3 à 1% en poids d'un éther alkylique d'oligosaccharide, et éventuellement
- 0,2 à 1% en poids d'un agent de déstabilisation.
- 3 à 5 mol.l-1 de NaOH,
- 0,1 à 1% en poids d'un composé viscosant,
- 0,2 à 0,5% en poids de bétaïne,
- 0,3 à 1% en poids d'un éther alkylique d'oligosaccharide, et éventuellement
- 0,2 à 1% en poids d'un agent de déstabilisation.
- une enceinte comprenant au moins une ouverture d'entrée et au moins une ouverture de sortie,
- un garnissage poreux disposé entre les ouvertures d'entrée et de sortie de l'enceinte,
- des moyens d'introduction dans ladite enceinte d'une phase liquide et d'une phase gazeuse par ladite, au moins une, ouverture d'entrée,
- des moyens d'aspiration de ladite phase liquide et de ladite phase gazeuse à travers le garnissage poreux, la mousse générée étant évacuée de ladite enceinte par lesdits moyens d'aspiration par ladite, au moins une, ouverture de sortie.
- un dispositif de génération d'une mousse tel que celui décrit précédemment, et
- des moyens de liaison étanches entre ladite, au moins une, ouverture de sortie de l'enceinte et la première extrémité de l'installation,
- La figure 1 est une vue en coupe transversale d'un mode de réalisation d'un dispositif de génération d'une mousse selon l'invention.
- La figure 2 est un schéma illustrant un mode de réalisation d'un dispositif de nettoyage d'une installation, par mise en circulation d'une mousse, utilisant le dispositif de génération d'une mousse schématisé sur la figure 1.
- La figure 3 est un graphique illustrant l'influence de l'épaisseur du lit de billes d'un garnissage poreux sur la vitesse de circulation d'une mousse, à dépression constante, à la sortie d'un générateur de mousse selon l'invention.
- La figure 4 est un graphique illustrant l'influence du diamètre des billes du garnissage poreux sur la vitesse de circulation, à dépression constante, d'une mousse générée selon le procédé de l'invention à la sortie d'un générateur de mousse selon l'invention.
- La figure 5 est un graphique illustrant l'influence du débit de la phase liquide sur le foisonnement, à dépression constante, d'une mousse mesurée pour deux diamètres de billes du garnissage poreux.
- La figure 6 est un graphique illustrant l'influence de la dépression en aval du garnissage poreux sur la vitesse de circulation d'une mousse générée selon le procédé de l'invention.
- 0,8% en poids d'ORAMIX CG 110 (marque déposée),
- 0,3% en poids d'AMONYL (marque déposée),
- 0,25% en poids de pentanol-2,
| ESSAI | 60a | 60b | 60c | 62a | 62b | 62c |
| EPAISSEUR DU GARNISSAGE z(m) | 0,05 | 0,05 | 0,05 | 0,08 | 0,08 | 0,08 |
| DEBIT DE LIQUIDE Qℓ (l/h) | 5 | 10 | 15 | 5 | 10 | 15 |
| VITESSE DE LA MOUSSE Vm(m/s) | 0,054 | 0,051 | 0,053 | 0,021 | 0,027 | 0,030 |
| ESSAIS | 70a | 70b | 70c | 70d | 62a | 62b | 62c |
| DIAMETRE DES BILLES DU GARNISSAGE POREUX (mm) | 3 | 3 | 3 | 3 | 1,6 | 1,6 | 1,6 |
| EPAISSEUR DU LIT z(en m) | 0,08 | 0,08 | 0,08 | 0,08 | 0,08 | 0,08 | 0,08 |
| Qℓ en l/h | 5 | 10 | 15 | 20 | 5 | 10 | 15 |
| Vm(m/s) | 0,15 | 0,14 | 0,14 | 0,17 | 0,021 | 0,027 | 0,030 |
| ESSAIS 80 z=0,08 m Vm=0,15 m/s | Qℓ en l/h | 3,6 | 9 | 14,4 | 18,8 |
| F | 51 | 26 | 17 | 15 | |
| ESSAIS 82 z=0,11 m Vm=0,12 m/s | Qℓ en l/h | 3,6 | 9 | 14,4 | 18,8 |
| F | 54 | 22 | 13 | 11 |
| DEPRESSION DANS LE CIRCUIT (x102Pa) | 150 | 200 | 300 | 350 | 400 | 450 |
| Vm (m/s) | 0,08 | 0,16 | 0,23 | 0,26 | 0,32 | 0,35 |
Claims (22)
- Procédé de génération d'une mousse à partir d'une phase liquide et d'une phase gazeuse, comprenant une étape consistant à générer la mousse par aspiration de la phase liquide et de la phase gazeuse à travers un garnissage poreux.
- Procédé de mise en circulation d'une mousse dans une installation comprenant une étape consistant à générer une mousse selon le procédé de la revendication 1 au niveau d'une première extrémité de l'installation de telle manière que la mousse générée soit introduite dans ladite installation et circule à travers celle-ci jusqu'à une deuxième extrémité de l'installation, l'aspiration étant réalisée en créant une dépression dans ladite installation à partir de ladite deuxième extrémité.
- Procédé de nettoyage d'une installation utilisant le procédé de la revendication 2, et dans lequel la mousse est une mousse nettoyante.
- Procédé selon la revendication 3, dans lequel la mousse nettoyante est en outre une mousse décontaminante.
- Procédé selon l'une quelconque des revendications 2 à 4 comprenant en outre les étapes consistant à collecter la mousse à partir de la deuxième extrémité de l'installation, à déstabiliser la mousse collectée de manière à obtenir un liquide, et à utiliser au moins une partie dudit liquide comme phase liquide pour générer la mousse mise en circulation dans ladite installation.
- Procédé selon la revendication 5, dans lequel le liquide est épuré avant d'être utilisé comme phase liquide pour générer la mousse.
- Procédé selon l'une quelconque des revendications 1 à 6, dans lequel la phase liquide comprend :de 0,2 à 0,5% en poids de bétaïne,de 0,3 à 1% en poids d'éther alkylique d'oligosaccharide, et éventuellementde 0,2 à 1% en poids d'un agent de déstabilisation.
- Procédé selon l'une quelconque des revendications 1 à 6, dans lequel la phase liquide comprend :3 à 6 mol.l-1 d'acide sulfurique,0,1 à 1% en poids d'un composé viscosant,0,2 à 0,5% en poids de bétaïne,0,3 à 1% en poids d'un éther alkylique d'oligosaccharide, et éventuellement0,2 à 1% en poids d'un agent de déstabilisation.
- Procédé selon l'une quelconque des revendications 1 à 6, dans lequel la phase liquide comprend :3 à 5 mol.l-1 de NaOH,0,1 à 1% en poids d'un composé viscosant,0,2 à 0,5% en poids de bétaïne,0,3 à 1% en poids d'un éther alkylique d'oligosaccharide, et éventuellement0,2 à 1% en poids d'un agent de déstabilisation.
- Procédé selon la revendication 1 à 9, dans lequel la phase gazeuse est choisie parmi de l'air, de l'azote, de l'oxygène, de l'argon ou de l'hélium, employés seul ou en combinaison.
- Dispositif (1) de génération d'une mousse comprenant :une enceinte (3) comprenant au moins une ouverture d'entrée (9, 11) et au moins une ouverture de sortie,un garnissage poreux (5) disposé entre les ouvertures d'entrée (9, 11) et de sortie de l'enceinte,des moyens d'introduction (13) dans ladite enceinte, d'une phase liquide, et une phase gazeuse par ladite, au moins, une, ouverture d'entrée (9, 11),des moyens d'aspiration de ladite phase liquide et de ladite phase gazeuse à travers le garnissage poreux, la mousse générée étant évacuée de ladite enceinte par lesdits moyens d'aspiration par ladite, au moins une, ouverture de sortie,
- Dispositif de mise en circulation d'une mousse dans une installation (20), ledit dispositif comprenant :lesdits moyens d'aspiration de la phase liquide et de la phase gazeuse à travers le garnissage poreux destinés à être placés au niveau d'une deuxième extrémité (20b) de l'installation de façon à pouvoir créer une dépression dans ladite partie de l'installation dans laquelle la mousse doit être mise en circulation, ladite dépression permettant de générer la mousse et de la mettre en circulation dans l'installation entre sa première extrémité (20a) et sa deuxième extrémité (20b).un dispositif de génération d'une mousse selon la revendication 11, etdes moyens de liaison étanches destinés à être placés entre ladite, au moins une, ouverture de sortie de l'enceinte et une première extrémité (20a) de l'installation,
- Dispositif selon la revendication 11 ou 12, comprenant en outre au moins un moyen d'aspersion (13) de la phase liquide dans l'enceinte.
- Dispositif selon la revendication 13, dans lequel le moyen d'aspersion (13) est une buse ou une grille.
- Dispositif selon l'une quelconque des revendications 11 à 14, dans lequel le garnissage poreux (5) est constitué d'un matériau sélectionné parmi un empilement de grilles métalliques, un tissu synthétique tricoté, du sable, des diatomées, des perlites, des billes solides calibrées, un matériau présentant des interstices.
- Dispositif selon l'une quelconque des revendications 11 à 15, dans lequel le moyen (11) d'introduction de la phase gazeuse dans l'enceinte est au moins une ouverture d'entrée (11) de l'air atmosphérique ambiant.
- Dispositif selon l'une quelconque des revendications 11 à 16, dans lequel les moyens d'introduction (9, 11) dans ladite enceinte (3), par au moins une ouverture d'entrée, d'une phase liquide comprennent une pompe doseuse (48) et un moyen (50) de mesure de débit.
- Dispositif selon l'une quelconque des revendications 11 à 17, dans lequel les moyens d'aspiration de 1a phase liquide et de la phase gazeuse à travers le garnissage poreux comprennent une pompe à vide (34).
- Dispositif selon la revendication 18, dans lequel la pompe à vide (34) est équipée d'un piège à condensat.
- Dispositif selon la revendication 12, comprenant en outre une cuve de réception (26) de la mousse placée au niveau de la deuxième extrémité de l'installation.
- Dispositif selon la revendication 20, comprenant en outre des moyens de récupération (38, 42) d'un liquide issu d'une déstabilisation de la mousse dans la cuve de réception (26) de la mousse, et des moyens (42, 48) pour pomper ledit liquide récupéré jusqu'aux moyens (9) d'introduction de la phase liquide dans l'enceinte du dispositif de génération de la mousse.
- Dispositif selon la revendication 21, comprenant en outre un moyen d'épuration (52, 53) du liquide récupéré, ledit moyen d'épuration étant placé en aval de la cuve de réception (26) de la mousse et en amont des moyens d'introduction (48, 9) de la phase liquide dans l'enceinte du dispositif de génération de mousse.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9800436 | 1998-01-16 | ||
| FR9800436A FR2773725B1 (fr) | 1998-01-16 | 1998-01-16 | Procede de generation et de mise en circulation d'une mousse dans une installation et dispositif pour la mise en oeuvre de ce procede |
| PCT/FR1999/000075 WO1999036165A1 (fr) | 1998-01-16 | 1999-01-15 | Procede de generation et de mise en circulation d'une mousse dans une installation et dispositif pour la mise en oeuvre de ce procede |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1047490A1 EP1047490A1 (fr) | 2000-11-02 |
| EP1047490B1 true EP1047490B1 (fr) | 2003-01-02 |
Family
ID=9521853
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99900935A Expired - Lifetime EP1047490B1 (fr) | 1998-01-16 | 1999-01-15 | Procede de generation et de mise en circulation d'une mousse dans une installation et dispositif pour la mise en oeuvre de ce procede |
Country Status (10)
| Country | Link |
|---|---|
| US (2) | US6561200B1 (fr) |
| EP (1) | EP1047490B1 (fr) |
| JP (1) | JP4166945B2 (fr) |
| AU (1) | AU2058899A (fr) |
| DE (1) | DE69904694T2 (fr) |
| ES (1) | ES2190192T3 (fr) |
| FR (1) | FR2773725B1 (fr) |
| RU (1) | RU2191623C2 (fr) |
| UA (1) | UA59427C2 (fr) |
| WO (1) | WO1999036165A1 (fr) |
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| FR2773725B1 (fr) * | 1998-01-16 | 2000-02-25 | Commissariat Energie Atomique | Procede de generation et de mise en circulation d'une mousse dans une installation et dispositif pour la mise en oeuvre de ce procede |
| FR2817170B1 (fr) * | 2000-11-30 | 2003-01-03 | Commissariat Energie Atomique | Procede, module et dispositif de mise en contact d'un gaz et d'un liquide |
| FR2824753B1 (fr) * | 2001-05-17 | 2003-07-25 | Commissariat Energie Atomique | Procede et dispositif de mise en circulation d'une mousse dans une installation |
| FR2827610B1 (fr) * | 2001-07-17 | 2005-09-02 | Commissariat Energie Atomique | Composition de degraissage utilisable pour le degraissage et/ou la decontamination de surfaces solides |
| FR2841802B1 (fr) * | 2002-07-08 | 2005-03-04 | Commissariat Energie Atomique | Composition, mousse et procede de decontamination de surfaces |
| DE10234472A1 (de) * | 2002-07-29 | 2004-02-12 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Beseitigen von Schaum im Laugenbehälter einer Trommelwaschmaschine |
| US8323420B2 (en) | 2005-06-30 | 2012-12-04 | Lam Research Corporation | Method for removing material from semiconductor wafer and apparatus for performing the same |
| FR2889085B1 (fr) * | 2005-07-28 | 2007-09-21 | Chabbert Chimie Sarl | Dispositif melangeur a des fins de generation de mousse notamment pour la reduction d'emissions de poussieres dans l'air |
| EP1973475B1 (fr) * | 2006-01-17 | 2010-07-14 | Baxter International Inc. | Dispositif, systeme et procede de melange |
| US20090038701A1 (en) | 2006-01-17 | 2009-02-12 | Baxter International Inc. | Device, system and method for mixing |
| US20070221255A1 (en) * | 2006-03-22 | 2007-09-27 | Burdge Adelbert D | Method for cleaning industrial equipment exposed to volatile organic compounds |
| US20080135071A1 (en) * | 2006-12-11 | 2008-06-12 | Kelley James P | Foam system |
| FI20085146L (fi) * | 2007-12-21 | 2009-06-22 | Maricap Oy | Menetelmä ja laitteisto pneumaattisessa materiaalinsiirtojärjestelmässä |
| FI20085145L (fi) * | 2007-12-21 | 2009-06-22 | Maricap Oy | Menetelmä ja laitteisto pneumaattisessa materiaalinsiirtojärjestelmässä |
| US8641661B2 (en) * | 2010-01-05 | 2014-02-04 | Baxter International Inc. | Mixing system, kit and mixer adapter |
| US8839661B2 (en) | 2010-10-26 | 2014-09-23 | Dow Global Technologies Llc | Direct quantitative colorimetric measurement of liquid foam |
| US20140026481A1 (en) * | 2011-03-04 | 2014-01-30 | Karl Podmajersky | Liquid foam production method and apparatus |
| DE102015011501A1 (de) * | 2015-09-09 | 2017-04-27 | Washtec Holding Gmbh | Schaumerzeuger |
| GB201615066D0 (en) * | 2016-09-06 | 2016-10-19 | Ge Healthcare Bioprocess R&D Ab | Packed bed emulsification |
| CN111623383B (zh) * | 2019-02-28 | 2023-10-13 | 青岛海尔智慧厨房电器有限公司 | 一种清洗装置、集成灶及其控制方法 |
| US12566118B2 (en) * | 2022-03-25 | 2026-03-03 | University Of Wyoming | Apparatus and methods for foam generation and foam evaluation |
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| DE1781104A1 (de) * | 1968-08-23 | 1970-10-22 | Wolfgang Muetzelburg | Landebahnbeschaeumungsgeraet mit veraenderlichen Verschaeumungsfaktoren,angepasst an die meteorologischen Verhaeltnisse |
| GB1532861A (en) * | 1975-08-18 | 1978-11-22 | Barry Wehmiller Co | Container washing apparatus |
| US4133773A (en) * | 1977-07-28 | 1979-01-09 | The Dow Chemical Company | Apparatus for making foamed cleaning solutions and method of operation |
| US4974618A (en) * | 1983-08-31 | 1990-12-04 | Duraclean International, Inc. | Apparatus and method for fabric cleaning with foam |
| SU1281283A1 (ru) * | 1985-07-18 | 1987-01-07 | Предприятие П/Я Р-6767 | Устройство дл образовани и разрушени пены |
| SU1706681A1 (ru) * | 1985-12-02 | 1992-01-23 | Предприятие П/Я Р-6956 | Устройство дл гомогенизации и распределени газожидкостной смеси по параллельным каналам |
| JPH0660068B2 (ja) * | 1988-06-10 | 1994-08-10 | 株式会社日静プラン | 起泡コンクリート用起泡形成装置 |
| US4934393A (en) * | 1988-06-30 | 1990-06-19 | John S. Lighthall | Spray gun cleaning apparatus |
| US4969488A (en) * | 1989-08-15 | 1990-11-13 | Milliken Research Corporation | Foam cleaner for loom reeds |
| US6454871B1 (en) * | 1997-06-23 | 2002-09-24 | Princeton Trade & Technology, Inc. | Method of cleaning passageways using a mixed phase flow of gas and a liquid |
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| AUPO797697A0 (en) * | 1997-07-16 | 1997-08-07 | Cooper, Norman William | Bin washer |
| RU2122889C1 (ru) * | 1997-10-10 | 1998-12-10 | Общество с ограниченной ответственностью "Региональный научно-технический центр "Стройтехнология" | Пеногенератор |
| FR2773725B1 (fr) * | 1998-01-16 | 2000-02-25 | Commissariat Energie Atomique | Procede de generation et de mise en circulation d'une mousse dans une installation et dispositif pour la mise en oeuvre de ce procede |
-
1998
- 1998-01-16 FR FR9800436A patent/FR2773725B1/fr not_active Expired - Lifetime
-
1999
- 1999-01-15 WO PCT/FR1999/000075 patent/WO1999036165A1/fr not_active Ceased
- 1999-01-15 DE DE69904694T patent/DE69904694T2/de not_active Expired - Lifetime
- 1999-01-15 US US09/582,529 patent/US6561200B1/en not_active Expired - Lifetime
- 1999-01-15 EP EP99900935A patent/EP1047490B1/fr not_active Expired - Lifetime
- 1999-01-15 ES ES99900935T patent/ES2190192T3/es not_active Expired - Lifetime
- 1999-01-15 RU RU2000121630/12A patent/RU2191623C2/ru not_active IP Right Cessation
- 1999-01-15 UA UA2000074228A patent/UA59427C2/uk unknown
- 1999-01-15 JP JP2000539926A patent/JP4166945B2/ja not_active Expired - Fee Related
- 1999-01-15 AU AU20588/99A patent/AU2058899A/en not_active Abandoned
-
2003
- 2003-03-05 US US10/378,882 patent/US6932330B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US20030150480A1 (en) | 2003-08-14 |
| WO1999036165A1 (fr) | 1999-07-22 |
| DE69904694T2 (de) | 2003-09-18 |
| AU2058899A (en) | 1999-08-02 |
| FR2773725A1 (fr) | 1999-07-23 |
| UA59427C2 (uk) | 2003-09-15 |
| ES2190192T3 (es) | 2003-07-16 |
| EP1047490A1 (fr) | 2000-11-02 |
| JP4166945B2 (ja) | 2008-10-15 |
| US6561200B1 (en) | 2003-05-13 |
| JP2002509019A (ja) | 2002-03-26 |
| US6932330B2 (en) | 2005-08-23 |
| DE69904694D1 (de) | 2003-02-06 |
| FR2773725B1 (fr) | 2000-02-25 |
| RU2191623C2 (ru) | 2002-10-27 |
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