FR3037049A1 - DEVICE FOR TREATING MULTIPHASIC LIQUIDS - Google Patents

Abstract

This device (10) for treating multiphasic liquids from leaks produced by an installation comprises a tank (12) including a settling chamber (32), an evacuation chamber (34, 38) having a main outlet (46), and a recovery chamber (40). It further comprises means (20, 58, 60) for feeding, into the settling chamber (32), a mixture of water and at least one other liquid which is little or immiscible in water, and at least two passages (30, 42) between the settling chamber (32) and respectively the discharge (34, 38) and recovery (40) chambers, arranged to exploit differences in densities between water and said at least one other liquid for directing water to the evacuation chamber (34, 38) and said at least one other liquid to the recovery chamber (40).

Description

The present invention relates to a multiphase liquid recovery device from leaks, for example light and identified, produced by an installation. By "multiphase liquids" is meant all types of liquids having at least two liquid phases which are poor or immiscible and possibly at least one solid phase that is poorly or immiscible in the liquid phases. The installations concerned by this type of device are, for example, electrical transformers equipping the electricity distribution networks or other consumer equipment for cooling liquids and installed outdoors, subjected to bad weather and likely to pollute the grounds. Their possible leaks, light and identified, are generally recovered in the form of a mixture of water (from bad weather) and other liquids (coming from the installation itself, especially cooling liquids) or solid (coming from floors or other external elements).

"Other liquids" means all types of liquids other than water which may be dangerous, polluting, toxic, harmful, corrosive and / or flammable. Thus, electrical transformers, essentially used to change the voltage of a current, produce a large amount of heat that must be dissipated. The cooling of these transformers is ensured by immersing their cores and windings in a coolant and dielectric liquid. This liquid, generally chosen from mineral oils and Polychlorinated Biphenyls (PCBs), is often polluting. Considering, for example, the highly toxic nature of PCB liquids, these compounds being ubiquitous, bioaccumulative and persistent pollutants whose toxicity varies according to their molecular weight (ie according to the number of chlorine atoms that their molecules contain) and the spatial configuration of their molecules, electrical transformers used in electricity distribution networks are generally installed above pits or holding tanks intended to collect the liquids contained in these devices when a leak occurs. In addition, it is recommended not to install an electrical transformer in a place exposed to conditions such as road traffic, corrosive atmosphere or high heat. In addition, the floor around the transformer must not have a throat to prevent any leakage of dangerous liquid, pollutant, toxic, harmful, corrosive and / or flammable is transformed, via a sewer system, rejection in the natural environment.

3037049 2 A retention pit for electrical transformer station is thus proposed in the patent FR 2 965 835 B1. It is buried in the ground and comprises two chambers, communicating with each other by means of a conduit, the first of which is arranged under the transformer and the second, remote, is provided with means 5 of continuous water evacuation . They are buried at different depths in the soil so as to separate the water from the other liquids by differences in densities, then to evacuate the water through the second chamber to recover the other liquids in the first chamber. Such a solution is impractical for two main reasons. On the one hand, this retention pit is intransportable once installed. On the other hand, it is difficult to recover liquids other than water, which must be pumped into the first chamber that receives the mixture of water and other liquids under the installation. Transportable devices for treating multiphasic liquids resulting from leaks produced by electrical installations have been marketed by the applicant since 1996, in particular under the references BAF and ICE. Each of these devices is in the form of a galvanized sheet metal tray having a single chamber for receiving a mixture of water and other liquids. This tray is intended to be arranged under the electrical installation. Its receiving chamber is advantageously covered with a hood with sloped slats and brought together in such a way as to avoid any fire being triggered by avoiding a sufficient supply of oxygen inside the tank, while allowing access of the potentially flammable mixture to the reception room. But, although transportable, these devices are nonetheless cumbersome and are not suitable for localized leaks, for example light and 25 identified, can still occur regularly. On the other hand, the other liquids are not effectively separated from the water in the receiving chamber and there is also a risk of overflow. These devices must then be supplemented by pits or tanks remote reinforced concrete such as those described in patents FR 2 948 647 B1 and FR 2 960 532 B1.

It may thus be desired to provide a multiphasic liquid treatment device which makes it possible to overcome at least some of the aforementioned problems and constraints. It is therefore proposed a device for treating multiphase liquids from leaks produced by an installation, comprising: a tank including at least three separate chambers: a settling chamber, an evacuation chamber having a main outlet and a recovery chamber, means for feeding, into the settling chamber, a mixture of water and at least one other liquid which is little or immiscible in water, and at least two passages between the settling chamber and respectively the evacuation and recovery chambers, arranged to exploit differences in densities between the water and the at least one other liquid to direct the water towards the evacuation chamber and said at least one other liquid to the recovery chamber. Thus, by providing a device in which at least three specific chambers for settling, evacuation and recovery are arranged in a single tank, it becomes possible to simply and effectively treat the regular and localized leaks, including in particular light leaks and identified.

According to this innovative configuration, it is indeed easy to design a lightweight device, that is to say easy to dispose releasably under a leak, and inexpensive. This device is also robust to the risks of soil pollution. Optionally, a multiphase liquid treatment device according to the invention may comprise a water filtration system disposed at the main outlet of the evacuation chamber. Since the liquid received in this chamber has already undergone a first separation between the water and the other liquid (s) simply by exploiting the differences in densities, the efficiency of the device is then further improved thanks to the filtration system. Optionally also, the water filtration system includes a removable filter cartridge disposed in a conduit extending outside the vessel from the main outlet of the exhaust chamber. Optionally also, a multiphase liquid treatment device according to the invention can be transportable manually and include for this gripping means, including at least two handles, disposed on an outer wall of the vessel. Also optionally, the settling chamber is provided with a coalescer system. Also optionally, the coalescer system extends into a lower half of the interior of the settling chamber and has a plurality of substantially parallel slats therebetween, inclined with respect to a base plane of the vessel. at least a portion of the slats having their lower end resting on a perforated plate substantially parallel to the base plane of the vessel. Also optionally: the evacuation chamber is subdivided into an evacuation antechamber and a main evacuation chamber, two passages, between the evacuation antechamber and respectively the decantation and main evacuation chambers, are arranged, one in the lower part, the other in the upper part of the tank, to direct the water 10 from the settling chamber to the main evacuation chamber through the antechamber evacuation, and the outlet main is located in the main evacuation chamber. Also optionally, the main evacuation chamber has a secondary outlet disposed with respect to the main outlet at a height such that it allows water to be evacuated in the event of clogging or blockage of the main outlet. Also optionally, a multiphasic liquid processing device according to the invention may include a liquid level indicator in the recovery chamber, this indicator being connected from outside the tank to two outlets of the recovery chamber. one in the lower part, the other in the upper part. Optionally also, the feed means of the mixture are arranged in a lid, disposed above the tank when the latter is placed on the ground, this lid having a base having an opening disposed 25 vis-à-vis of the settling chamber. Optionally also, the lid further comprises a mixture recovery grate extending above and away from its base, this grid having a cover disposed above the opening of the lid base. The invention will be better understood with the aid of the description which follows, given solely by way of example and with reference to the appended drawings, in which: FIG. 1 represents, schematically and in transparent perspective, the structure In a simplified embodiment of a multiphase liquid transportable device, according to an embodiment of the invention, FIG. 2 is a diagrammatic sectional view along a plane AA indicated in FIG. FIG. 3 is a top view without a cover of the transportable device 5 of FIG. 1, FIG. 4 shows a section of the transportable device of FIG. 1 along a plane BB indicated in FIG. 3. in which a coalescer system is further illustrated, FIG. 5 is a perspective view of the coalescer system of FIG. 4, and FIG. 6 is a side view of the coalescer system. transportable device of Figure 1, in a direction D indicated thereon. The multiphase liquid transportable transport device 10 shown diagrammatically in FIG. 1 is intended to be disposed under a leak, for example a light and identified leak, produced by an electrical transformer or other installation (not shown). It is in the form of a cylindrical tank 12, having a circular solid base 14 constituting its bottom and a cylindrical side wall 16, open at the top 18 and intended to be covered with a lid 20. The circular cylindrical general shape of the tank 12 20 is described by way of non-limiting example, it may be different (parallelepiped or otherwise) depending on the uses and applications envisaged. To be able to dispose the tank 12 on the ground stably, three legs 22 are optionally provided under the base 14 of the tank 12. Each of these feet is for example constituted by a metal plate folded in "S" or "U" at its ends, one of these ends being integral with the base 14, the other being intended to rest on the ground and the middle part of the foot can be inclined so as to improve the stability of the assembly. By further disposing these three legs 22 at 120 degrees from each other, a stable and evenly distributed base for the transportable device 10 is obtained. This base is also provided by way of non-limiting example. It may be different in number and shape of the feet, depending on the uses and applications envisaged. Finally, to improve the hand-held portability of the transportable device 10, handles 24, for example two, are optionally provided on the outer face of the side wall 16. These handles 24 may take the form of metal hoops in "U" whose folded ends are secured to the side wall 16 of the vessel 12, for example by welding. They are also illustrated by way of non-limiting example. They may be different in number and shape, depending on the uses and applications envisaged. By transparency, FIG. 1 makes it possible to visualize the internal volume of the tank 12. It comprises several distinct chambers separated by flat internal walls intended to be substantially vertical when the device 10 is placed on the ground. A first inner wall 26 extends between two inner portions of the side wall 16 of the tank 12, the base 14 of the tank 12 to its upper part 18. This first inner wall 26 is eccentric (ie it does not pass not 10 by the central axis of the cylindrical volume of the vessel 12) so as to separate the interior of the vessel 12 into two interior spaces of unequal volumes. In the smaller of these two interior spaces, a second inner wall 28 extends substantially orthogonal from the first inner wall 26 to the side wall 16. It is as high as the first inner wall 26. In contrast, it does not reach the base 14 in the lower part of the tank 12, so as to provide a passage 30 between two chambers 32 and 34 which it delimits in this smaller one of the two interior spaces of the tank 12. large of the two interior spaces of the tank 12, a third inner wall 36 extends from the axis of intersection between the first inner wall 26 and the second inner wall 28 20 to the side wall 16. This third inner wall 36 is as high as the first and second inner walls 26 and 28 and reaches the base 14 in the lower part of the tank 12, so as to spare no passage between two chambers 38 and 40 that it delimits In the largest of the two interior spaces of the tank 12, the configuration of the chambers 32, 34, 38 and 40 in the tank 12 is such that the chambers 34 and 38 are terraced and the chambers 32 and 40 are terraced. The third inner wall 36 extends more precisely at an angle of less than 90 degrees, for example at an angle of 60 degrees, to the side of the chamber 38 and thus to an additional adjacent angle greater than 90 degrees, for example at an angle The chamber 32, which is in the example of FIG. the interior of the tank 12, is intended to receive, from the top of the tank 12, a mixture of water and at least one other liquid little or immiscible in water, this mixture being derived from a slight leakage and identified under which the transportable device 10 is installed. By an effect of the differences in densities between the water and the other liquid or liquids, the mixture will decant in this chamber 32, so as to have at least two phases. By taking the example of a liquid which is dangerous, polluting, toxic, harmful, corrosive and / or flammable less dense than water, which is generally the case when this other liquid is a mineral oil or a PCB, the phase containing essentially water will settle under the phase containing essentially the other liquid. This chamber 32 can be described as a settling chamber. The passage 30 between the two chambers 32 and 34, disposed at the bottom of the tank 12, then allows evacuation of the water by exploiting the differences in densities 10 from the settling chamber 32 to the chamber 34, which can thus be qualified antechamber of evacuation. The first inner wall 26 also has two rectangular openings 42 and 44 in the upper part. The first 42 of these two openings allows the settling chamber 32 to communicate from the top with the largest of the two chambers of the largest of the two interior spaces of the tank 12. Thus, this opening 42 forms a passage between the settling chamber 32 and chamber 40 for recovery, by exploiting differences in densities, of the other liquid from above in the chamber 40. The latter can thus be described as hazardous liquid recovery chamber, pollutant, toxic, harmful, corrosive and / or flammable. The second 44 of the two openings of the first inner wall 26 allows the exhaust antechamber 34 to communicate from the top with the smallest 38 of the two chambers of the largest of the two interior spaces of the tank 12. Thus, this opening 44 forms a passage between the exhaust antechamber 32 and the chamber 38 for upward water recovery in the chamber 38. The latter further comprises two outlets to which drain ducts (partially illustrated on this figure), one referenced 46 in the lower part and the other referenced 48 in middle or high part, and can be described as a main chamber for continuous discharge of water. The outlet 46 is the main outlet for continuously discharging the water while the outlet 48 is a secondary outlet, provided in the event of clogging or blocking of the main outlet 46. It will be noted that it is important that the base of the passage 42 between the settling chamber 32 and the recovery chamber 40 is at a height greater than that of the base of the passage 44 between the exhaust antechamber 34 and the main discharge chamber 38 when the transportable device 10 is placed on the floor, so that the water can escape through the passage 44 without water can escape into the recovery chamber 40 through the passage 42. It will also be noted that the exit 48 in the middle or upper part of the main evacuation chamber 38 must be at a lower height than the base of the passage 44 to 5 properly fulfill its secondary evacuation function. Optionally, outlets may be provided in the lower parts of the settling chamber 32 and recovery 40 for specific emptying of these two chambers. Thus, an outlet 50, to which an evacuation duct may be connected, is provided in the lower part of the settling chamber 32, while an outlet 52, to which an evacuation duct can also be connected, is provided in the lower part of the recovery chamber 40. An outlet 54 is further provided in the upper part of the recovery chamber 40 to perform an optional level indication function in cooperation with the output 52, as will be detailed later.

The cover 20 intended to cover the tank 12 comprises, for example, a solid base 58 in which an opening 60 is arranged. This opening 60 must be above the settling chamber 32 when the lid 20 is correctly positioned on the tank 12 to bring any liquid mixture received by the lid 20 to this settling chamber 32. The lid 20 may further comprise a gate 62 above and at a distance from its solid base 58 so as to filter at least roughly a number of possible solid residues (leaves, branches, soil, pebbles, etc.). Advantageously, the grid 62 then has a solid cover 64 above the opening 60 to protect the latter from finer residues. The lid 20, with at least its full base 58 and its opening 60, provides means for feeding any liquid mixture leaking over the transportable device 10 to the settling chamber 32. The lid 20 is shown in FIG. 2 in section along a plane AA shown in Figure 1. It shows that its solid base 58 may optionally have a slight downward slope to the opening 60 to guide liquid leakage to the settling chamber 32 below. It may further comprise at least one locking notch (not shown) to ensure correct angular positioning on the tank 12. The top view without lid illustrated in Figure 3 shows an example of respective sizing of the four chambers 32, 34, 38 and 40 by means of the positioning of the inner walls 26, 28 and 36. In the illustrated example, the recovery chamber 40 occupies more than two-thirds or more than three-quarters of the interior volume of the vessel 12 , the volume of the settling chamber 32 is more than three times greater than that of the evacuation anteroom 34 which itself represents only slightly more than half that of the main evacuation chamber 38.

That said, the sizing of the four chambers 32, 34, 38 and 40 is left to the discretion of those skilled in the art according to the needs or constraints of each specifically contemplated application. The top view of FIG. 3 also makes it possible to more completely illustrate the exhaust ducts connected to the outlets 46, 48, 50, 52 and 54.

A duct 66 is thus connected to the outlet 46 situated in the lower part of the main evacuation chamber 38, just above the base 14. It has a cubit and then a rectilinear portion extending substantially parallel to the ground, or even on a slight slope to facilitate the flow of discharged water. In a first part of its rectilinear portion, it comprises a valve 68, then, in a second part downstream of the valve 68 in the direction of the water flows, a system 70 for filtering water. This system 70 takes for example the form of a removable filter cartridge allowing the water to pass by retaining the dangerous products in case it remains residual after passage of the water in the settling chamber 32, then in the exhaust antechamber 34, then into the main discharge chamber 38. Advantageously, this filter cartridge 70 forms a plug when it is saturated. It can be chosen from those described in US Pat. Nos. 6,485,639 B1, US 6,503,390 B1 or US 6,841,077 B2. It thus consists of at least one tube filled with at least one gelling agent and / or a powdery material such as sand, activated charcoal, diatomaceous earth granules (or Kieselguhr) or granules. clay. The gelling agent may consist of particles and / or water insoluble polymer fibers capable of adsorbing mineral oil particles or PCBs. For example, they may be styrene-substituted and styrene-substituted polymer particles, vinyl chloride copolymers including a vinyl chloride copolymer, and comonomers such as vinyl acetate, dichloroethylene, acrylonitrile, and the like. , methacrylonitrile, acrylates, methacrylates and the like, acrylic polymers such as methyl methacrylate polymers, ethyl acrylate and the like, styrene polymers such as polystyrene, styrene copolymers and divinylbenzene, polymers and styrene alkyl copolymers or a combination thereof. As an example, the filter cartridge 70 is a Petro-Pipe (Trade Mark) cartridge marketed by Solidification Products International (SPI). A duct 72 is connected to the outlet 48 situated at the middle or upper part of the main discharge chamber 38. It consists mainly of a bend 5 downwards and serves to evacuate the transportable device 10 to the outside. - Full of water in the main discharge chamber 38, for example in case of high flow rates caused by bad weather, filter cartridge 70 clogged, or valve 68 closed. Optionally and independently of the transportable device 10, an outer bin (not shown) may be provided below the free end of the conduit 72 to accommodate this overflow. In this case, the outer tank may comprise a bottom grid and at least one absorbent pad placed on the grid, to filter the water one last time before being discharged into the natural environment. A duct 74 is connected to the outlet 50 located in the lower part of the settling chamber 32, just above the base 14. This duct 74 is provided with a valve 76 and performs a function of emptying the chamber. decantation 32 for easy maintenance of the transportable device 10. A duct 78 is connected to the outlet 52 located in the lower part of the recovery chamber 40, just above the base 14. This duct 78 is provided with a valve 80 and performs a function of emptying the recovery chamber 40 for easy maintenance of the transportable device 10. Finally, a conduit 82 is connected to the outlet 54 located in the upper part of the recovery chamber 40. This conduit 82 comprises a first bent 84 downwards, followed by a transparent tube (not visible in this figure) extending vertically along the side wall 16 of the tank 12, itself followed by a second lateral bend 86 allowing a connection to the conduit 78. The portion of the duct 82 located between the second lateral bend 86 and the duct 78 may be provided with a valve 88. The function of this duct 82, more precisely carried out by its transparent tube, is to visually indicate the level of liquid contained in the recovery chamber 40 when the valve 88 is open. In this way, a user can be alerted to empty or empty the recovery chamber 40 when the indicated liquid level reaches or exceeds a certain predetermined threshold. Part of the duct 82, in particular the transparent tube, can be protected by a grid 90 fixed to the side wall 16 of the tank 12. FIG. 4 represents a section of the transportable device 10, along a plane BB indicated in FIG. This section also makes it possible to illustrate certain optional elements not shown in the preceding figures for the sake of clarity and simplicity. In particular, the settling chamber 32 may comprise an additional wall 92 at the bottom of the tank 12. This additional wall 92 extends from the base 14 to a height only slightly greater than that of the passage 30 facing the latter. It is erected between the first inner wall 26 and the side wall 16 parallel to the second inner wall 28 at a distance therefrom. It thus fulfills a function of retention of any sludge or elements with a density higher than that of the water inside the settling chamber 32. This sludge or other elements thus retained can then be evacuated by emptying at the same time. assistance of the exit 50. If unfortunately a part of these sludge or elements arrives until the antechamber of evacuation 34, this one retains them anyway in view of the important difference in level between the passage 30 and the passage 44.

In particular also, the settling chamber 32 may comprise a coalescer system 94, that is to say a filter system for improving the settling of the mixture received in the settling chamber 32 by accelerating the phase separation between water and the other liquid or liquids of lower density. Advantageously, this coalescer system 94 extends in an intermediate zone of the settling chamber 32 located under the opening 60 of the cover 20 in a lower half of the interior space of the settling chamber 32. As illustrated in FIG. 4, but also in Figure 5 which shows in perspective, it is mounted on a cylindrical foot 96 to be placed at a certain height despite everything and has a plurality of lamellae 98 25 substantially parallel to each other, inclined at an angle between 40 and 60 degrees relative to the plane of the base 14 of the tank 12. These strips 98 are mounted between two parallel arms 100 extending substantially horizontally from the second inner wall 28. At least a portion of the lamellae 98 have their lower end which rests on a perforated plate 102 itself supported by the cylindrical foot 96. The perforated plate 102 is substantially rectangular, essential parallel to the plane of the base 14 and comprises a plurality of circular holes whose diameter can be adapted as a function of the liquid phases to be separated, for example 4 mm when it is a question of separating water and mineral oils or PCB.

The side view of the transportable device 10 illustrated in FIG. 6 in a direction D indicated in FIG. 1 makes it possible to better visualize the duct 82 and in particular its vertical transparent tube, which here bears the reference 104. The L-shape of this 82, which allows it to extend mainly vertically while connecting laterally to the duct 78, imposes a lateral shift of the outlets 52 and 54. In addition, the protective grid 90 of the transparent tube 104 can extend over any or part of its length. In terms of the materials used to make the transportable device 10, galvanized sheet may be chosen to design the tank 12 and its base 10 as well as its handles 24, the cover 20, the inner walls 26, 28, 36, 92 and the Coalescer System 94. The normal operation of the transportable device 10 can be summarized as follows. When a slight leak is detected in an installation, the transportable device 10 is placed under this leak so that a mixture of water and other liquid can be received by its cover 20. The liquid mixture passes through the gate 62 , falls on the solid base 58 of the lid 20 and is guided towards the opening 60 and then towards the inside of the settling chamber 32. As the level of the liquid mixture rises in this settling chamber 32, the separation of the liquid phases is possibly accelerated thanks to the optional presence of the coalescer system 94.

By virtue of differences in densities, assuming that the other liquid is less dense than water, the liquid phase other than water is positioned above the aqueous phase. The water is evacuated towards the exhaust antechamber 34 through the passage 30, the sludge or other elements of density higher than that of the water being retained in the settling chamber 32 by the additional wall 92.

When the water in the evacuation antechamber 34 reaches the base of the passage 44, it flows into the main evacuation chamber 38 and is evacuated to the duct 66 for ultimate filtration by the system 70. liquid in the settling chamber 32 reaches the base of the passage 42, the liquid phase other than the water flows into the recovery chamber 40, the level of the aqueous phase remaining limited by the level of the base of the passage 44 which is lower than that of the base of the passage 42. The level of liquid recovered in the chamber 40 is permanently indicated by the vertical transparent tube 104. For optimum operation of the transportable device 10, it can be previously filled with water when his installation. This means that water is then present in the settling chamber 32 and in the evacuation antechamber 3037049 13 34 to the level of the base of the passage 44, the recovery chamber 40 and the main chamber. evacuation 38 remaining empty. It is clear that a multiphasic liquid treatment device such as that described above makes it possible to simply and efficiently treat regular, localized, light and identified leaks in potentially polluting installations, according to a design that allows for poor embodiments. expensive to make. It will furthermore be noted that it can advantageously be used in cooperation with other known leak treatment systems, such as the sealing devices sold by Kinectrics under the name Sorbweb Plus (registered trademark) or the like. For example, a sealing system such as that described in US Pat. No. 7,527,738 B2 may be retained. A device according to the invention finds its practical applications not only in the recovery of light and identified leaks from electrical transformers equipping the electricity distribution networks, but also in the recovery of liquids from other installations without exiting of the scope of the invention. Note also that the invention is not limited to the embodiment described above.

As a variant in particular, the shapes and relative dimensions of the constituent elements of the device detailed with reference to FIGS. 1 to 6 may be adapted to the particular circumstances envisaged by those skilled in the art. Also as a variant and for the sake of simplicity, the exhaust antechamber 34 and the main evacuation chamber 38 could be grouped into a single evacuation chamber. Starting from the embodiment of FIGS. 1 to 6, it would suffice, for example, to suppress the inner wall 36, to eliminate the passage 44, to remove the outlets 46 and 48 and to add a single outlet at the top of the chamber 34 for connection to the exhaust duct 66. In this case, the conduit 68 provided in case of overflow could be replaced by a gooseneck branch disposed in the upper part of the duct 66. In a variant also, the relative positioning of the passages between settling chambers recovery and evacuation can be easily adapted if the liquids to be recovered are of higher density than that of water. It will be apparent more generally to those skilled in the art that various modifications may be made to the embodiment described above in light of the teaching just disclosed to it. In the following claims, the terms used are not to be construed as limiting the claims to the embodiment set forth in this specification, but should be interpreted to include all the equivalents that the claims are intended to cover because of their formulation. and whose prediction is within the reach of the person skilled in the art by applying his general knowledge to the implementation of the teaching which has just been disclosed to him.

Claims (11)

REVENDICATIONS1. Device (10) for treating multiphasic liquids resulting from leaks produced by an installation, characterized in that it comprises: a tank (12) including at least three distinct chambers: a settling chamber (32), discharge (34, 38) having a main outlet (46), and - a recovery chamber (40), means (20, 58, 60) for supplying, in the settling chamber (32), a mixture of water and at least one other liquid that is immiscible or immiscible in water, and at least two passages (30, 42) between the settling chamber (32) and the evacuation chambers (34, 38) respectively. ) and recovery (40), arranged to exploit differences in densities between water and said at least one other liquid to direct water to the evacuation chamber (34, 38) and said at least one other liquid to the recovery chamber (40). 2. Device (10) for treating multiphase liquids according to claim 1, comprising a system (70) of water filtration disposed at the main outlet (46) of the discharge chamber (34, 38). The multiphase liquid processing device (10) of claim 2, wherein the water filtration system (70) includes a removable filter cartridge disposed in a conduit (66) extending out of the vessel (12) from the main outlet (46) of the evacuation chamber (34, 38). 4. Device (10) for treating multiphase liquids according to any one of claims 1 to 3, transportable manually and comprising for this gripping means (24), in particular at least two handles, arranged on an outer wall (16) of the tank (12). The multiphase liquid processing device (10) according to any one of claims 1 to 4, wherein the settling chamber (32) is provided with a coalescer system (94). The multiphase liquid processing apparatus (10) of claim 5, wherein the coalescer system (94) extends into a lower half of the interior of the settling chamber (32) and includes a plurality lamellae (98) substantially parallel to each other, inclined with respect to a base plane (14) of the tank (12), at least a portion of the lamellae (98) having their lower end resting on a perforated plate (102) substantially parallel to the base plane (14) of the vessel (12). 5 7. Device (10) for treating multiphase liquids according to any one of claims 1 to 6, wherein: the evacuation chamber (34, 38) is subdivided into an evacuation anteroom (34) and a main chamber two passages (30, 44), between the exhaust antechamber (34) and the decanting chambers (32) and the main discharge chamber (38) respectively, are arranged, one (30) in the lower part, the other (44) in the upper part of the tank (12), for directing water from the settling chamber (32) to the main discharge chamber (38) via the Ventilation anteroom (34), and the main outlet (46) is disposed in the main discharge chamber (38). The multiphase liquid processing device (10) according to claim 7, wherein the main discharge chamber (38) has a secondary outlet (48) disposed with respect to the main outlet (46) at a height of 20 it allows a water evacuation in case of congestion or blockage of the main exit (46). The multiphase liquid processing device (10) according to any one of claims 1 to 8, including a liquid level indicator (104) in the recovery chamber (40), said indicator (104) being connected by the outside of the two-outlet tank (52, 54) of the recovery chamber (40), one (52) in the lower part, the other (54) in the upper part. 10. Device (10) for treating multiphase liquids according to any one of claims 1 to 9, wherein the means (20, 58, 60) for feeding the mixture are arranged in a cover (20), disposed above the tank (12) when the latter is placed on the ground, this cover (20) having a base (58) having an opening (60) disposed vis-à-vis the settling chamber (32). The multiphase liquid processing device (10) of claim 10, wherein the lid (20) further comprises a grate (62) for recovering the mixture extending above and away from its base (58). ), this gate (62) having a cover (64) disposed above the opening (60) of the base (58) of the cover (20).