BG64414B1 - Device for agitation and aeration of a liquid and foam elimination in a tank for the treatment of the above liquid - Google Patents

Abstract

The device is used for the treatment of fatty extracts taken out of the town sewing waste waters or from the food industry. It is of improved design and higher efficiency. The device includes a vertical canal (11) continuing along part of the reservoir height (1), a funnel (14) fitted around the upper part of canal (11), first series of holes (17) provided for in the upper part of canal (11), second series of holes (18) fitted in canal (1) above the bottom of funnel (14), vertical shaft (19) in the interior of the canal (11), spiral (20) fitted to the free part of shaft (19), under the bottom of funnel (14), antivortex mechanism (24) mounted inside the canal (11) under spiral (20), devices (25) for the adjustment of the level of the liquid in the funnel (14) and devices for gas (33) injection under pressure in canal (11).

Description

(54) LIQUID MIXTURING AND AERING DEVICE AND FOAM ELIMINATION IN A LIQUID GAS TREATMENT TANK

Technical field

The invention relates to a device for stirring and aerating a liquid and eliminating foam in a reservoir for treating this liquid, for example, oily stains extracted from sewage from urban sewage or from the food industry.

BACKGROUND OF THE INVENTION

It is known that sewage that moves into sewage systems such as urban sewage is collected at treatment plants where various treatment operations are carried out so that these waters can be treated before being returned to the natural environment.

This treatment produces by-products related to the treatment, such as fats, mud.

As the drainage pipes absorb less and less of these products, they need to be treated by treatment plants.

The grease trapped on entry to the treatment plant is poured into the biodegradation tank described in EP 0687497, equipped with a mechanical stirrer to stir this fluid.

This type of aeration and stirring device is particularly suitable for lower density liquids, i. E. low-viscosity, and its effectiveness decreases rapidly for fluids that contain fat.

Purification of the liquid with this type of device, for example for greasy waste, creates a thick layer of foam on the surface of the liquid, which pollutes the environment.

SUMMARY OF THE INVENTION

The invention aims to avoid the disadvantages of the prior art by creating a device for stirring and aeration of liquid, especially greasy waste extracted from urban sewage or food industry, to effectively treat this type of liquid and to collect the foam that floats on the surface of this liquid through simple means and with low energy consumption.

The invention provides a device for stirring and aeration of the liquid and for removing the foam in the fluid treatment tank, which inside has a vertical channel that extends part of the height of the tank and is closed at its upper end, and is open at its lower end, where the channel and the bottom of the tank are joined in a passage for the fluid. A funnel 10 is connected around the upper end of the channel and its upper edge forms a free space for fluid passage through the tank wall. A vertical shaft, driven at one end rotatably, is located inside the channel and extends from its upper 15 end to the bottom of the funnel. The main spiral is attached to the free part of the shaft, in the groove below the bottom of the funnel. An anti-vortex mechanism is located inside the channel below said spiral. The tank also includes means for regulating the level of fluid in the funnel and means for injecting pressurized gas into the channel under the anti-vortex mechanism.

According to the invention, the device includes static agitators by cavitation of the fluid inside the channel, these means being located under the channel's anti-vortex mechanism.

According to the invention, the device further includes a first series of openings located at the top of the duct at the level of the fluid inside the funnel, a second series of openings in the duct above the bottom of the funnel, and means for regulating the level of the fluid in the funnel.

According to the invention, the means for regulating the flow of liquid and foam, which are sucked from the spiral of the vertical channel and include a first cuff located around the channel at the level of the first series of openings, and a second cuff located around the channel at the level of the second series of openings , the position of the cuffs against the corresponding openings can be adjusted vertically.

Cavitation static agitators include a vertical tube that is located inside the channel extending from the bottom of the tank and reaching under the anti-vortex mechanism and static obstacles located one above the other inside the channel and attached to that tube.

The device includes a second anti-vortex mechanism located inside the duct and above the main coil. This mechanism includes at least two vertical plates, each extending upward with a reinforcing rib that extends to the upper end of the channel. The device includes an accelerator of fluid inside the channel, means for aeration of the surface of the liquid inside the tank, a vortex pump for suction from the surface of the liquid inside the channel, which is located above the second anti-vortex mechanism and at the level of the first series of openings. The device also includes a single-channel spiral for suction of the fluid inside the channel located above the second anti-vortex mechanism and at the level of the first series of openings, and a two-channel spiral for suction of the liquid inside the channel located above the second anti-vortex mechanism and at the level of the first series open.

The tank is insulated.

Further features and advantages of the invention are set forth below in the description and in the appended figures.

Description of the attached figures

Figure 1 shows a schematic sectional view of a fluid treatment tank provided with a device for stirring and aerating said fluid according to a first embodiment of the invention;

Figure 2 is a sectional view taken along line 2-2 of FIG. 1;

Figure 3 is a schematic sectional view of a purification tank provided with a device for stirring and aerating said fluid according to a second embodiment of the invention;

Figure 4 is a sectional view taken along line 4-4 according to FIG. 3;

Figure 5 is a schematic sectional view of a fluid mixing and aeration device according to a third embodiment of the invention;

Figure 6 is a schematic sectional view of a fluid accelerator of the agitation and aeration device according to the invention;

Figure 7 is a schematic sectional view of the liquid surface aeration means;

Figure 8 is a partial schematic view and section view of a fluid mixing and aeration device according to a fourth embodiment of the invention;

Figure 9 is a schematic view and a full scale view of a vortex pump according to a fourth embodiment of the device of the invention;

Figure 10 is a sectional view taken along line 10-10 of FIG. 9;

Figure 11 is a partial schematic view and sectional view of a fluid mixing and aeration device according to a fifth embodiment of the invention;

Figure 12 is a sectional view taken along line 12-12 of FIG. 11;

Figure 13 is a schematic view and sectional view of a fluid mixing and aeration device according to a sixth embodiment of the invention;

Figure 14 is a sectional view taken along line 14-14 of FIG. 13.

Figures 1 and 3 show a reservoir 1 provided at the upper end with an opening 2 for the inlet of the liquid 3 to be treated, such as oily tributaries that are extracted from urban sewage inflows.

The face of the treatment tank 1 is covered with insulating material and includes a device for stirring and aeration of the liquid and foam removal, generally referred to as No. 10.

The device 10 according to the invention, located inside the tank 1, consists of a vertical channel 11 disposed on part of the height of the tank 1.

The upper end of the Pan channel 11 is closed with the plate 12, and the lower end of the channel 11 is open and forms a passage 13 for the liquid 3 with the bottom of the tank 1.

Device 10 also comprises an upwardly extending funnel 14, the upper edge of which forms, with the wall of the tank 1, a free space 15 for passage of fluid 3, and its lower edge is connected to a channel 11 at some distance from the upper end of the channel 11.

The assembly formed by channel 11 and funnel 14 is secured inside the tank 1 by suitable means, for example legs 16, between which passages are formed to pass the fluid.

Channel 11 includes a first series of openings 17, which are evenly distributed along this channel 11 and are located at the level of the liquid, inside the funnel 14.

Channel 11 is also provided with a second series of openings 18, which are evenly distributed along the channel 11 and are located above the bottom of the funnel 14.

Apparatus 10 is also provided with means for sucking liquid and foam inside the channel 11 through openings 17 and 18, which consist of a vertical shaft 19 located inside that channel 11, starting from the upper end of the channel 11, to the bottom of the funnel 14, and through a main spiral 20 attached to the free end of the shaft 19 below the bottom of the funnel 14.

The diameter of the main coil 20 is smaller than the inner diameter of the channel 11.

The shaft 19 and the spiral 20 are rotated by a motor gear 21, which is secured to a plate 12 to close the upper end of the channel 11.

Device 10 is provided with means for regulating the flow of liquid and the suction foam from the main coil 20 inside the channel 11 through openings 17 and 18.

These adjusting means are formed by a cuff 22 located around the channel 11 at the level of the first series of openings 17, and by a second casing 23 located around the channel 11 at the level of the second series of openings 18.

The position of each of the cuffs 22 and 23 with respect to the respective openings 17 and 18 is vertically adjusted by suitable tightening means not shown in the figures. An anti-vortex device 24 is located inside the channel 11, below the spiral 20, to prevent fluid from rotating in the channel 11.

As shown in Figure 2, the anti-vortex device 24 consists of 3 vertical plates 24a, spaced 120 ° in the interior of the channel 11.

The apparatus 10 is also provided with means for regulating the level of the fluid 3 in the funnel 14, which consists of an overflow tube 25 located inside the funnel and whose position is vertically adjustable.

According to a second embodiment of the invention shown in FIG. 3, the device 10 includes devices for static stirring by cavitation of the liquid 3, which consist, on the one hand, of a vertical pipe 31 located inside the channel 11, which starts from the bottom of the tank 1 and reaches below the anti-vortex device 24 and, on the other hand, from static obstacles 32 located one above the other inside the channel 11 and attached to the pipe 31.

The pipe 31 is secured to the bottom of the tank 1 by suitable means. Static obstacles 32 form, along with the inner wall of channel 11, passageways for fluid circulation.

According to Figure 3, static obstacles 32 are distributed on a tube 31 below the anti-vortex device and on the bottom of the channel 11.

For example, the tube 31 contains at its upper end, below the vortex 24, two static obstacles 27 arranged one above the other, and at the lower end of the channel 11 there are also two static mechanisms 32 arranged one above the other.

In one embodiment, the side obstacles 32 may be evenly distributed throughout the section of the pipe 31 located in the channel 11.

According to another embodiment of FIG. 3, static obstacles 32 are formed by concave bowls, the concave side of which is directed towards the bottom of the tank 1.

The apparatus 10 also includes means 33 for injecting pressurized gas, for example air into the duct 11.

These injection means 33 are made up of at least one pipe 34 that is connected to the channel 11, for example at a level below the static obstacles 32 located at the upper end of the pipe 31.

An exemplary embodiment of the invention

The described device works as follows.

The fluid 3 to be treated is poured through the opening 2 in the tank 1 to a level above the upper edge of the funnel 14.

The gearbox 21 is driven by a shaft 19, which in turn drives the main coil 20 by rotation.

At the same time, the pressurized gas is injected into the duct 11 via a pipe 34. The rotation of the main coil 20 causes the fluid 3 to be sucked in through the duct 11 through openings 17 and 18, so that the fluid 3 circulates continuously from top to bottom in duct 11, then passes into space 13 and circulate from bottom to top between channel 11 and the inner wall of tank 1, etc.

The anti-vortex device 24 prevents the fluid from rotating in the channel 11 under the coil 20.

The fluid level 3 inside the funnel 14 is below the fluid level inside the tank 1 and this fluid level inside the funnel 14 is adjusted by an overflow pipe 25 such that this level is substantially half the height of the openings 17 .

In addition, due to the aspiration created by the spiral 20 inside the channel 11, the level of fluid inside this channel 11 is below the level of the fluid inside the funnel 14.

The air introduced into channel 11 by rotation of the spiral 20, as well as the pressurized gas injected into the channel 11, form gas bubbles which are dispersed in the liquid 3 inside the channel 11 by the action of rotation of the spiral 20.

When the fluid 3 is circulated inside the channel 11, static obstacles 32 give rise to under each of them a cavitation effect that favors the agitation and aeration of the fluid 3. These obstacles 32 have the advantage of being static, favoring the agitation and aeration of the fluid in the channels 11 and interfere with the retention of fibers inside this channel 11. In this way, the liquid 3 is stirred and the gas bladders are separated into microbubbles that favor the dispersion of the gas and hence the aeration of the liquid. Article 3.

Between the inner wall of the tank 1 and the duct 11, gas bubbles accelerate the fluid flow, facilitating the circulation of that fluid inside the tank 1, which improves the efficiency.

The fluid to be purified is repeatedly passed into channel 11 and thus enriched repeatedly with oxygen.

The flow of fluid 3 can be adjusted by moving the cuffs 22 and 23 with respect to the openings 17 and 18.

Stirring the liquid 3 through the helix 20 and static obstacles 32 results in the formation of foam on the surface of the liquid 3 in the tank 1.

The rotation of the coil 20 inside the tube 11 causes pumping of the level of the surface of the liquid 3 inside the funnel 14 and suction of foam floating on the surface of the liquid 3, as well as the fall of the level of this liquid inside the channel 11.

In this way, the foam is absorbed, immersed and mixed with the liquid 3 inside the tank 1, and gradually removed.

The position of the cuffs 22 and 23 with respect to the openings 17 and 18 regulates the flow rate of the suction fluid and foam inside the channel 11 and through the spiral 20. The choice of the main spiral 20 and the rotational speed of that spiral 20 allows to adjust the energy consumption , depending on the liquid to be treated.

In case the device according to the invention does not contain static obstacles 32 as shown in FIG. 1, this naturally creates turbulence inside the channel 11.

However, the efficiency is low and is suitable for less loaded liquids.

Static obstacles 32 favor the agitation of the fluid by cavitation, which increases the efficiency of the device.

In one embodiment, the cavitation static agitators comprise static barriers that are secured to the inner wall of the channel 11 and form an axial passage of fluid circulation 3.

These static obstacles are distributed evenly throughout the channel 11, which is located above the anti-vortex device 24 or inside the channel 11, on the one hand below the anti-vortex device 24 and on the other, in the lower part of the pipe 11.

In this case, the static obstacles are also formed, for example, by concave bowls whose concave side is oriented towards the bottom of the tank 1 or through disks.

According to a third embodiment of FIG. 5, the device includes a second anti-vortex mechanism 40 located inside the channel 11 and above the main coil 20. This second anti-vortex mechanism 40 includes at least two vertical plates 40a, each of which extends upward from the reinforcing rib 41 to the upper end of channel 11.

Preferably, the second anti-vortex mechanism 40 is formed by 4 vertical plates 40a, distributed evenly inside the channel 11, each extending upward with a reinforcing rib 41.

According to another embodiment of FIG. 6, the device includes a fluid accelerator inside the channel 11. This fluid accelerator includes a second helix 45 located above the second anti-vortex mechanism 40 that interacts with the rotation of the shaft 19. The second helix 45 has a segment that is oriented in the same direction. such as the section of the main spiral 20. The fluid accelerator also includes an anti-vortex mechanism 46 located above the second spiral 45 and inside the cylindrical shaft 47. The shaft 47 is secured to the inner edge of the reinforcing holes 41 so as to off channels with channel 11 and between reinforcing ribs 41 of fluid passage 48.

The second coil 45, the anti-vortex mechanism 46, and the shaft 47 are disposed between the two series of openings 17 and 18, which in this embodiment are provided with means for regulating the flow rate of the liquid 3 and the foam sucked inside the channel 11.

Rotation of the main coil 20 causes the suction of liquid 3 into the channel 11 through the openings 17 and 18 so that the liquid circulates continuously from top to bottom in that channel.

As a result of the rotation of the second helix 45, the suction of the fluid 3 into the channel 11 through the openings 17 and 18 is accelerated and a portion of the liquid is returned up through the passages 48 formed between the channel 11 and the shaft 47, which further accelerates the fluid acceleration inside channel 11.

In this case, the adjustment of the fluid level 3 inside the channel 11 is always made from the position of the cuffs 22 and 23 with respect to the openings 17 and 18.

The anti-rotation mechanism 46 prevents the fluid from rotating in the shaft 47.

This conversion option is also suitable for products that are particularly sparkling.

In fact, due to the acceleration of the suction of the fluid inside the shaft 47 due to the recirculation of part of that fluid in passages 48, the foam floating on the surface of the fluid 3 is sucked inside the shaft 47.

According to another embodiment of FIG. Ί the device includes means for aeration of the surface of the liquid 3 inside the tank 1. The means for aeration of the surface of the liquid 3 include a secondary coil 50 located above the second anti-vortex mechanism 40 which interacts with the rotation of the shaft 19. This secondary coil 50 has inverted section with respect to the section of the main spiral 20. The means for aerating the surface of the liquid 3 also include a counter-rotating mechanism 51 located above the secondary spiral 50 and inside a cylindrical over azhna shaft 52. The longitudinal shaft 52 is fixed on the inner edges of the reinforcing nervures 48 so formed with the channel 11 and the reinforcing nervures 48 passages 55 for the liquid 3.

The secondary coil 50 and the vortex mechanism 51 are disposed between the two series of openings 17 and 18 and the longitudinal shaft 52 extends from the middle of the first series of openings 17 to the upper edge of the second series of openings 18.

A cover 53 is mounted on a shaft 19 above the upper edge of the longitudinal shaft 52.

The vertical position of the lid 53 is adjusted to form an adjustable passage 54 with the upper edge of the shaft 52.

Rotation of the main coil 20 causes the fluid 3 to be sucked in through openings 17 and 18, so that fluid 3 circulates from the bottom up into the channel 11 and thus one part of the liquid 3 is sucked into the channel 11 through the openings 18 and the other part of the fluid 3 is sucked in through openings 17 and circulates from top to bottom in passages 55 formed between shaft 52 and channel 11.

Considering the projection of the secondary coil 50, which is facing the projection of the main coil 20, part of the liquid is sucked into the longitudinal shaft 52 from the bottom up and discharged into the air at the surface of liquid 3 inside the funnel 14, passing through passage 54. Thus, the ejection of a portion of the fluid permits the aeration of the surface of the fluid 3 and thus reduces the formation of foam on that surface. The anti-vortex mechanism 51 prevents the fluid 3 from rotating in the longitudinal shaft 52 above the secondary coil 50.

In this embodiment, the flow of fluid 3 in the channel 11 can also be adjusted by moving the cuffs 22 and 23 with respect to the openings 17 and 18.

According to an embodiment of FIGS. 8 to 10, the device includes a vortex pump 60 for suction from the surface of the liquid inside the channel 11. The vortex pump 60 is driven by rotation of a shaft 19 and includes, on the one hand, a circular disk attached to a shaft 19 and provided on its upper surface with radial and vertical blades 62 and, on the other hand, a short tube 63 fixed to the upper edge of the blades 62.

The assembly consisting of disk 61, blades 62 and short tube 63 is secured to the shaft 19 by a cuff 61 a that can be adjusted on the shaft 19.

The cuff 61a is secured to the shaft by a mechanism, for example, consisting of a fastening screw not shown in the figures.

As shown in Figures 8 and 9, the upper edge of the blades 62 is provided with a termination portion 64 extending beyond the short tube 63.

The short tube 63 is mounted to the top of the tank 1, essentially from the middle of the first series of openings 17 to the upper edge of the blades 62. This short tube 63 forms an inner passage 65 and is connected at the bottom to the interior of the channel 11 by annular passages 66 formed between the blades 62 and between the end portion 64 of the disk 61.

Preferably, the short tube 63 is conical and the cone is directed to the top of tank 1, as shown in FIG. 9.

In one embodiment, the short tube 63 may be cylindrical.

The blades 62 are even or curved from the outside and are three in number, preferably evenly distributed on the disk 61, as shown in FIG. 10.

The rotation of the main coil 20 causes the fluid 3 to be sucked into the groove 11 and through openings 17 and 18, so that this liquid 3 circulates continuously from top to bottom in said channel 11. In addition, the rotation of the vortex pump 60 is driven by a shaft 19, t .f. the rotation of the assembly, consisting of a disk 61, blades 62 and the short tube 63, causes the surface of the fluid 3 to be sucked into passage 65, after which this fluid passes through annular openings 66 and is again discharged into tank 1.

In this embodiment, it is not necessary to regulate the flow of the fluid through the cuffs 22 and 23 inside the channel 11.

This embodiment is particularly suitable for many foamed products, because the foam floating on the surface of the liquid 3 is sucked in by the vortex pump 60, which enables the foam to be removed quickly and efficiently.

According to the embodiment shown in Figures 11 and 12, the device includes a single-channel spiral 70 for suction of liquid 3 inside the channel 11. This single-channel spiral 70 is located above the second anti-vortex mechanism 40 and at the level of the first series of openings 17.

The single-channel spiral 70 is rotated by shaft 19 and includes, on the one hand, a circulating disk 71 fixed to the shaft 19 and located at the fluid level 3 of tank 1 and, on the other, inside the fluid 3, a vertical plate 72 that forms the spiral, attached to the front of the disk 71 around the shaft 19.

As shown in FIG. 12, the plate 72 delineates a side opening 73 for the fluid extending over the entire height of the plate 72, a vertical channel 74 for circulation of the liquid from top to bottom and a lower outlet 75 for the liquid.

The assembly consisting of a disk 71 and a vertical plate 72 is secured to a shaft 19 by a cuff 71a, the vertical position of which on this shaft can be adjusted. For this purpose, the cuff a is secured to the shaft 19 by a mechanism consisting, for example, of a fixing screw not shown. The inner edge of the vertical plate comprises a vertical deflector 76, inclined toward the center of the spiral formed by said plate 72. On the other hand, the distance between the plate 72 and the axis of the shaft 19 decreases gradually, as shown in FIG. 12.

The rotation of the single-channel coil 70 driven by shaft 19, i. the rotation of the kit consisting of disc 71 and plate 72 in the direction indicated by the arrow in FIG. 12, causes fluid to be sucked inside said plate 72 through the side opening 73.

This fluid is stirred inside the vertical channel 74 and circulated therein from above to be discharged into the channel 11 through the side opening 75.

The deflector 76 improves the agitation of the fluid inside the vertical channel 74 and prevents the fluid from returning through the side opening 73.

According to another embodiment of FIG. 14, the device includes a two-channel spiral 80 for suction of fluid 3 inside the channel 11. This two-channel spiral 80 is located above the second anti-vortex mechanism 40 and at the level of the first series of openings 17.

The two-channel spiral 80 is driven by a rotation of the shaft 19 and includes, on the one hand, a circular circular disk 81 fixed to that shaft 19 and located above the level of the liquid 3, in the tank 1, and on the other, inside the liquid 3, two vertical plates - blades 82 and 83. The vertical blades 82 and 83 are fixed on the inside face of the disk 80 and each of them has the shape of one of the two halves of a mussel shell, which are opposed and spaced apart, as shown in FIG. . 14.

The two blades 82 and 83 define two lateral inlets 84 and 85 of the fluid, two channels 86 and 87 for circulation of these liquids from top to bottom, and a lower outlet 88 for the fluid.

The assembly, consisting of a circular circular disk 81 and vertical blades 82 and 83, is secured to the shaft 19 by a cuff 81a, the vertical position of which on this shaft 19 can be adjusted.

The cuff 81a is secured to the shaft 19 by a mechanism, for example, consisting of a fastening screw not shown in the figure.

As shown in particular in FIG. 14, the edge of each blade 82 and 83 is disposed opposite the groove 86 or 87, separated by another blade containing a vertical deflector 89 and 90, respectively.

The rotation of the two-channel coil 80 is driven by a shaft 19, i. E. the rotation of the kit consisting of disk 81 and both blades 82 and 83 in the direction indicated by the arrow in FIG. 14, causes the suction of liquid 3 through the openings 17.

This fluid penetrates through the side openings 84 and 85, is stirred inside channels 86 and 87, and circulates from top to bottom inside these channels 86 and 87, and is then discharged into channel 11 through the lower outlet 88.

The baffles 89 and 90 increase the agitation of the fluid inside the channels 86 and 87 and prevent the fluid from re-entering through the side openings 84 and 85.

In these two embodiments, no adjustment of the flow rate of the fluid through the cuffs 22 and 23 of the channel 11 is necessary, the two latter embodiments being particularly used in cases where the fluid level inside the tank 1 is variable.

To improve the flow rate of the single-channel coil 70 or two-channel coil 80, a pumping device not shown in the figure may be provided on a shaft 19, below the single-channel coil or below the two-channel coil.

Application of the invention

The apparatus according to the invention is applicable, for example, to the treatment of urban waste water, industrial waste water, biodegradation fats, drainage materials, livestock waste and all industrial biodegradable products.

The device according to the invention can also be used for ozonation of water by ozonation gas, with or without catalyst, in stabilizing the mud or in heat treatment or for liquids containing suspended materials, for example organic or mineral materials.

This device can be used as a reactor that operates in a liquid or mobile bed.

The device according to the invention has the advantage that it purifies the liquid and at the same time gradually removes the foam floating on its surface in the purification tank, thus protecting the environment from contamination.

Claims (33)

Claims A device for stirring and aerating a liquid and eliminating foam in a reservoir (1) for purifying a liquid, which includes, inside the reservoir (1), a vertical channel (11) extending over a portion of the height of the reservoir (1) and comprising at least one opening (17) with an inlet passage for the liquid (3) at its upper end, and at least one second opening representing the exit passage (13) for the liquid (3) near the bottom of this tank; a funnel (14) positioned around the top of a duct (11) and connected to that duct (11), forming, along with the wall of the tank (1), a free space (15) for fluid penetration with the top edge of that funnel (14) (3); a main spiral (20) located inside the channel (11) below the bottom of the funnel (14); a vertical shaft (19) driven at one end by a rotation located inside the groove (11) above the spiral (20), driving the latter by rotation; anti-vortex mechanism (24) located inside the duct (11), under the spiral (20), means (33) for injection of pressurized gas into the duct (11), under the anti-vortex mechanism (24), characterized in that also includes static agitators (31,32) solely by the turbulence of a fluid (3) in the interior of the channel (11), these means being located under the anti-vortex mechanism (24). Device according to claim 1, characterized in that it comprises a first series of openings (17) formed at the top of the channel (11) and the level of the liquid (3) inside the funnel (14); and a second series of openings (18) formed above the bottom of the funnel (14), and means (25) for regulating the level of the fluid (3) in the funnel (14) are also provided. Apparatus according to claim 2, characterized in that it includes means (22, 23) for adjusting the flow rate of liquid (3) and foam, sucked in by a spiral (20) inside the channel (11). Device according to claim 3, characterized in that the means for regulating the flow rate of the liquid (3) and the foam, sucked by the spiral (20), consist of a first cuff (22) located around the channel (11) at the level of the first series of openings (17), and of the second cuff (23) located around the groove (11) at the level of the second series of openings (18), the position of these cuffs (22,23) with respect to the corresponding openings (17 , 18) is adjusted vertically. Device according to one of Claims 1 to 4, characterized in that the static turbulence generators consist of a vertical pipe (31) located inside the channel (11) and extending from the bottom of the tank (1). ) to the anti-vortex mechanism (24) and below it, and static obstacles (32) located one above the other inside the channel (11) and fixed to the pipe (31). Apparatus according to claim 5, characterized in that the static obstacles (32) form passages for the circulation of fluid (3) on the inside of the channel (11). Device according to claims 5 and 6, characterized in that the static obstacles (32) are evenly distributed over the entire surface of the pipe (31) located in the channel (11). Device according to claims 5 and 6, characterized in that the static obstacles (32) are distributed over a pipe (31), under the anti-vortex mechanism (24) and on the lower part of the channel (11). Device according to claim 5, characterized in that the static turbulence stirring means consist of static obstructions fixed by the inner wall of the channel (11) and form an axial passage for circulating fluid (3). A device according to claim 9, characterized in that the static obstacles are evenly distributed over the entire portion of the channel (11) located below the anti-vortex mechanism (24). A device according to claim 10, characterized in that the static obstacles are distributed inside the channel (11), on the one hand - under the anti-vortex mechanism (24) and on the other - on the lower part of the channel (11). Apparatus according to claims 5 to 11, characterized in that the side obstacles are formed by cups (32), the concave side of which is directed towards the bottom of the tank (1). Apparatus according to claims 5 to 11, characterized in that the static obstacles are formed by disks. Device according to any one of the preceding claims, characterized in that the tank (1) is insulated. Apparatus according to any one of the preceding claims, characterized in that the means for regulating the level of fluid (3) in the funnel (14) consist of an overflow pipe (25) which is located inside the funnel (14) and positioned it is adjusted vertically. Device according to any one of the preceding claims, characterized in that it comprises a second anti-vortex mechanism (40) located inside the channel (11) and above the main coil (20), said second anti-vortex mechanism (40) comprising at least two vertical plates (40a), each extending upward with a reinforcing rib (41) reaching the upper end of the channel (11). Device according to one of the preceding claims, characterized in that it includes a fluid accelerator (45,46,47) inside the channel (11). Device according to one of the preceding claims, characterized in that the fluid accelerator consists of a second coil (45) positioned above the second anti-vortex mechanism (40) acting in synchronization with the rotation of the shaft (19) and with a step, pointing in the same direction as the step of the main coil (20) and from a counter-rotating mechanism (46) located above the second coil (45) and inside a cylindrical shaft (47) secured to a reinforcing rib (41) such as the second spiral (45), anti-vortex mechanism (45) and shaft (47) are located m zhdu two series of holes (17, 18). Device according to one of Claims 1 to 16, characterized in that it includes means (50,51,52) for aeration of the liquid surface inside the tank (20). Device according to one of Claims 1 to 16 and 19, characterized in that the means for aeration of the liquid surface are formed by a secondary spiral (50) positioned above the second anti-vortex mechanism (40) acting in synchronization with rotation of a shaft (19) and a step opposite to the step of the main spiral (20), and of a counter-rotating mechanism (51) positioned above the secondary spiral (50) and inside a vertically longitudinal cylindrical shaft (52) mounted on reinforcing ribs (41), such as the secondary helix (50) and against the vortex mechanism (51) is located between the two series of openings (17,18) and above the false shaft (52), which extends substantially from the middle of the first series of openings (17) to the upper edge of the second series of openings (18). Device according to claim 20, characterized in that the cover (53) is mounted on a shaft (19) above the upper edge of the over-lying shaft (52) and forms an adjustable passage (54) with the upper edge. Apparatus according to one of Claims 1 to 3 and 5 to 16, characterized in that it includes a vortex pump (60) for suction of liquid from the surface inside the channel (11) located above the second anti-vortex mechanism (40 ) and at the level of the first series of openings (17). A device according to claim 22, characterized in that the vortex pump (60) includes a circular disk (61) rotating with a shaft (19) and provided with radial and vertical blades (62) on its upper surface and a short a pipe (63) attached to the upper edge of the blades (62) extending to the upper part of the tank (1) substantially from the middle of the first series of openings (17) to the upper edge of the blades (62). Device according to claim 23, characterized in that the short tube (63) is conical and its cone is directed to the upper part of the tank (1). A device according to claim 23, characterized in that the short tube (63) is cylindrical. A device according to claim 23, characterized in that the blades (62) are straight or curved from outside to inside. Device according to one of Claims 1 to 3 and 5 to 16, characterized in that it includes a single-channel spiral (70) for suction of liquid (3) inside the channel (11) located above the second anti-vortex mechanism ( 40) and at the level of the first series of openings (17). A device according to claim 27, characterized in that the single-channel spiral (70) includes a circulating disk (71) which operates in synchronization with the rotation of the shaft (19) and is located at the level of the fluid (3) in the reservoir (1). ), and a vertical plate (72) housed in the fluid (3) and attached to the underside of the disk (71) around a shaft (19), wherein the plate (72) defines a lateral inlet (73) for the fluid (3) , a vertical channel (74) for fluid circulation from top to bottom and a lower outlet (75) for fluid. A device according to claim 28, characterized in that the inner edge of the vertical plate (72) has a vertical deflector (76) inclined towards the center of the spiral. Device according to one of Claims 1 to 3 and 5 to 1 6, characterized in that it includes a two-channel spiral (80) for suction of liquid (3) inside the channel (11) located above the second anti-vortex mechanism (40) and at the level of the first series of openings (17). A device according to claim 30, characterized in that the two-channel spiral (80) includes a circular circular disk (81) operating in synchronization with the rotation of the shaft (19) and located at the level of the fluid (3) in the reservoir (1) and placed in the liquid (3) two vertical plates (82,83) which are secured to the underside of the disk (81) and have the shape of two half shells facing each other, defining two lateral entrances (84, 85) for the fluid, two vertical channels (86, 87) for the circulation of the liquid from top to bottom, and one lower outlet (88) h and the liquid. A device according to claim 31, characterized in that the edge of each vertical plate (82, 83) is located opposite the groove (86, 87) bounded by the other plate, which contains a vertical deflector (89,90). Device according to claim 27 or 29, characterized in that the pumping spiral is secured to the shaft (19), under the single-channel spiral (70) or under the two-channel spiral (80). Attachment: 14 figures