LID FOR FRACTIONING FOAM.

Description

DESCRIPTION Attached to a patent application for an INDUSTRIAL INVENTION having by title: “Lid for foam separation” ******* The present invention relates to a lid for fractionation of foams configured to close a device at the top for the reduction and / or removal of foam and a device for the removal and / or demolition of foam equipped with the aforementioned lid. 5 A device for the reduction and / or removal of foam, also called foam suppressant, is a component of a device called protein skimmer which has the purpose of forming foam and subsequently breaking it down and remove it from the inside of the water of aquatic environments, for example basins artificial, whether freshwater, brackish or saltwater. 10 Such artificial basins are generally shallow, such as for example ponds, closed or semi-closed lakes, in which there may be pollutants. In particular, a protein skimmer is used in oxygenation processes or mechanical mixing of water, configured to generate 15 foam suspensions, so that the solid pollutants, which remain in the water basin due to water stagnation, have bubbles on the surface and / or are brought to the surface by them, thus facilitating their removal. The device for the demolition and / or removal is the component that 20 specifically deals with breaking down the foam formed. In particular, the residual foam and pollutants are collected in a suitable collection basin to be subsequently eliminated for gravity or pumping. In particular, the foam formed is generally not very dense and takes up 25 so much volume inside the device. Currently known state-of-the-art devices are not always capable of to effectively remove all the foam resulting in accumulation of dirt inside the device. The gases used to make the foam give it a structure 5 light and inconsistent, making the task difficult for the device to manage to eliminate it completely. Therefore, it is necessary to direct the working action of the device to at least partially release the gas trapped inside the foam in so as to make it heavier, making it easier to remove and making it more 10 quickly creates space for new foam to form. In particular, it is currently known to make a device for foam abatement where the device is composed of a body of tubular shaped and vertically oriented collection and a lid shaped like a transparent bell positioned above the body of 15 collection. The foam rises up the collection body to the lid and carries it with it surface impurities. The lid is equipped internally with a rotating basket which It breaks down foam when it comes into contact with it. 20 Any dirt seeps onto the walls of the collection body and, in particular, going to settle in a drainage well, from which it is subsequently aspirated and eliminated. Disadvantageously, the current solutions mentioned in the prior art highlight some problems. 25 A first problem is found in the appearance of the lid transparent, configured to allow observation of the correct operation of the device, it tends to get dirty quite quickly. Therefore, an operator is forced to cyclically stop and open the device to check the internal status and make appropriate adjustments 30 cleaning and maintenance operations. A further disadvantage encountered is given by the fact that, in the presence of abundant foam, often the basket does not have enough strength to break it down effectively and this leads to the foam coming out of the vent openings, dirtying the outside of the house in an uncontrolled manner 5 device. A further disadvantage is that, in the presence of gas injection by the protein skimmer other than oxygen or its derivatives, such as example pure ozone, such gases, if in quantities greater than the degree of dissolving in water, they tend to remain volatile and be released into the atmosphere 10 outside the device. In the event that the foam abatement device is placed in a closed environment, the gas risks saturating the environment with consequent health risk to human operators within the environment itself. The technical task of the present invention is therefore to provide 15 provision a lid for the fractionation of foams configured for a device for the reduction and / or removal of foam and a device for the reduction and / or removal of foam exceeding the defects and deficiencies found in the prior art. The aim of the present invention is therefore to make available 20 a cover for a device for the felling and / or removal of the foam and a device for the abatement and / or removal of foam that allows the foam reduction process to be optimised even in presence of large volumes of foam generated. A further aim of the present invention is therefore to provide 25 provision a lid for the fractionation of foams configured for close the top of a device for the demolition and / or removal of the foam and a device for the reduction and / or removal of foam that they are self-cleaning, minimising the number of machine downtimes and internal cleaning and maintenance operations by operators. 30 A further aim of the present invention is therefore to provide provision of a lid for the separation of foams configured for a device for the reduction and / or removal of foam and a device for the reduction and / or removal of foam configured for minimize if not eliminate external fluid losses, both liquids that of gas, within the work environment, minimizing the effort 5 necessary for cleaning and maintaining health of the external environment by the operators. The technical task and the technical purposes specified are essentially reached by a lid for the fractionation of foams, containing the features illustrated in one or more of the present claims. 10 In particular, the lid for the foam fractionation is made transparent and in use configured to close the top of a device for the reduction and / or removal of foam. The lid is substantially concave in shape and equipped at least one vent hole for fluids at the top. 15 The lid comprises a collection body comprising a wall of collection configured to allow percolation of the foam, a primary central opening in use configured to face a volume containment of the foam removal device and a secondary central opening, arranged opposite and coaxial to the opening 20 primary power plant with respect to the collection body. The lid further comprises at least one rotating member for the removal of foam, above and coaxial with respect to the opening primary power plant with respect to the collection body. The rotating organ comprises a basket, equipped with a plurality of holes 25 passers-by. The rotating member further comprises a centrifugal propeller, arranged inside the basket, configured for fractionation and projection of the foam on the collection wall. Advantageously, the lid allows for better 30 foam fractionation function by means of the presence of the centrifugal propeller, managing to thicken it and make it more concentrated in terms of weight. In particular, the presence of the centrifugal propeller allows for better fractionation of the foam and projecting the liquefied foam into 5 most effective way on the collection wall. The foam when fractionated it is denser and heavier, and being liquefied percolates more effectively downwards, dragging any impurities. According to a first embodiment, the lid as a whole 10 defines a bell-shaped geometry, which, advantageously, allows for more effective percolation of the foam from the collection wall. According to an alternative embodiment, the lid overall it defines a cylindrical or truncated conical geometry, the 15 which, advantageously, allows for a more efficient implementation economic lid. According to one aspect of the present invention, the centrifugal propeller comprises a central support and a plurality of developing blades radially with respect to the central support and arranged transversely with respect to 20 a plane of rotation of the central support. Each blade comprises a portion proximal to the support central and a portion distal to the central support, in which the distal portion has a superior superficial extension compared to to the proximal portion. 25 Advantageously, the distal portion with superior superficial extension allows for more effective collection and projection of the foam on the collection wall, according to a suction movement vertical in correspondence with the central support and movement of the foam in a radially outward direction. 30 According to one aspect of the present invention, each blade of such plurality of blades is arranged perpendicular to a plane of rotation of the central support. Advantageously, an arrangement of the blades perpendicular to the rotation plane of the central support allows to increase the amount of foam treated compared to currently known devices in the 5 state of the art. According to one aspect of the present invention, the distal portion of a blade is shaped with a linear cross-section. Advantageously, the linear cross-section of the blade allows for carry out suction more effectively and extensively 10 central and the projection of the foam on the collection wall. According to one aspect of the present invention, the centrifugal propeller comprises a support disk comprising a first side from which they develop perpendicularly away from the central support and the blades, and a second facade, opposite to the first facade, configured 15 to be fixed firmly to the basket. Advantageously, the presence of the disc constituted integral with the support central and the blades allows for a more effective transmission of the rotational motion on the blades and the flow of the foam towards the portion distal blades due to centrifugal force. 20 According to one aspect of the present invention, the device comprises further an inlet pipe connected to the main body, configured to introduce a flow of a liquid intercepting the basket and the centrifugal propeller. Advantageously, the inlet tube introduces additional liquid, 25 preferably clean fresh water, on the basket and on the centrifugal propeller. From on one side, the liquid performs a cleaning action on the rotating organ and the lid within which the rotating organ rotates, on the other the liquid tends to weigh down the foam projected onto the collection wall, allowing for a more effective percolation of the same. 30 Furthermore, the collection wall being transparent allows an operator external to view the functioning of the various components inside of the lid by virtue of the cleaning action promoted by the rotating organ which keeps the wall clean, ensuring transparency and therefore visibility inside, of the lid wall Therefore, adding additional liquid helps speed up the 5 percolation of foam from the wall so as to free the wall from the residual foam adhering to the wall which otherwise it would tend to dry out, covering the wall and obscuring the view inside the lid. According to one aspect of the present invention, the lid comprises 10 further a separating disk arranged transversely to the internal surface of the collection wall and comprising at least one breathing opening, in which the disc is interposed between the basket and at least such a vent hole so as to define a slowing path of the foam. 15 Advantageously, the disc acts as a barrier to excessive rising of the foam, limiting its escape and such as to rechannel the foam towards the rotating basket. According to one aspect of the present invention, the basket is shaped like a cylindrical or truncated conical drum, comprising a first portion of 20 base, a second base portion and a side section portion circular transversal interposed between the two. The second base portion is open, giving access to the inside of the basket. According to a first embodiment, the inlet pipe is 25 positioned in correspondence with the lateral portion of the basket. According to a second embodiment, the attachment is positioned in correspondence of the first portion of the base of the basket. In particular, the attack is positioned in correspondence with the opening of separator disk breathing. Preferably, the separating disc is arranged parallel to the plane of rotation of the basket and the breathing opening is made coaxial with the secondary central opening. Advantageously, the disk, arranged parallel to the plane of rotation of the 5 basket and having the breathing opening coaxial with the central opening secondary, allows you to channel the energy more effectively foam towards the basket. Furthermore, this configuration allows a direct coaxial connection with organs for transmitting motion to a driving element located outside 10 of the lid. The technical task and the technical purposes specified are essentially further achieved by an improved device for the removal of the foam. The improved device for removing foam comprises a 15 tubular body, oriented vertically and comprising at the top a circular opening, a liquid collection separating wall, housed internally to the tubular body and comprising at least one channel peripheral drainage and at least one central inlet mouth of the substances to be broken down. 20 The improved device also includes a lid for the foam fractionation, as described above, configured to close the tubular body at the top, in which the central opening primary is arranged coaxially to the circular opening of the tubular body and in in which the rotating organ is above and coaxial with the mouth of 25 tubular body entrance. Advantageously, the device is configured to allow the lid to divide the foam rising from the central mouth for by means of the rotating organ and allow the collection and disposal of the percolated foam, being shaped to allow the foam to percolate 30 from the collection wall to the inside of the peripheral drainage well. According to a first embodiment, the improved device for the Foam removal is achieved in fluid communication with the outside. According to a second embodiment the improved device for the foam removal is made hermetically sealed compared to 5 outside. In particular, the device perfected for the reduction of foam includes at least one extraction duct connected to a corresponding vent hole and in use configured to achieve a communication of hermetically sealed fluid with a corresponding extraction medium 10 fluids. Advantageously, the improved device for removing foam, according to the second embodiment, it can be used inside closed environments and avoid risks to the health of operators present within such closed environments. 15 Further features and advantages of the present invention will appear clearer from the indicative, and therefore non-limiting, description of an embodiment of a lid for the fractionation of foams and an improved device for removing foam. This description will be presented below with reference to the united 20 drawings, provided for indicative purposes only and therefore not limiting, in which: - Figure 1 illustrates an improved device for the felling of foams, seen in section; - figure 2 shows a detail of the rotating part of the device perfected for the removal of foam illustrated in figure 1; 25 - Figure 3 illustrates an overall view of a first form of construction of a lid for foam separation; - Figure 4 shows a side view of the cover illustrated in figure 3; - Figure 5 shows a sectional view of the cover along a 30 cutting plane AA illustrated in figure 4; - Figures 6 and 7 show two exploded views of a lid according to figures 3-5; - Figure 8 shows a detail of the propeller shown in Figures 6 and 7; - figures 9 and 10 respectively illustrate two side views of a 5 second embodiment of a lid for the foam fractionation. With reference to figures 1 and 2, 1 has been indicated as a whole an improved device for the reduction of foam, subsequently called just “device 1”. 10 As will become clearer later, the device 1 as illustrated in the present figures it is configured not only to break down the foam but also to generate them, thus resulting in a protein skimmer. The device 1 comprises a tubular body 2, closed at the top by a lid for the fractionation of foams 3, subsequently 15 called only “lid 3”. Device 1 defines a containment volume “V” within which the fractionated foam is collected. In particular, the volume of “V” containment is located substantially inside the tubular body 2. The tubular body 2 is oriented vertically and has a top 20 a circular opening 20. The lid 3 is made transparent and in use configured to close the device 1 at the top, in particular the tubular body 2. The lid 3 is shaped substantially concave and equipped with at least one vent hole 17 on the top. The lid 3 comprises a collection body 15. 25 The collection body 15 comprises a collection wall 21 configured for allow for foam percolation, a primary central opening 22 and a secondary central opening 23. The primary central opening 22 is in use configured to face the containment volume “V” of device 1. 30 The secondary central opening 23 is arranged opposite and coaxial to the primary central opening 22 with respect to the collection body 15. The primary central opening 22 is arranged below the cover 3 and configured in use to face, preferably coaxially, respectively to the circular opening 20 of the tubular body 2. The cover 3 further comprises at least one rotating member 16 for 5 the removal of foam, above and coaxial with respect to the opening primary power unit 22. The rotating organ 16 comprising a basket 25 drilled, in rotary use and provided with a plurality of through holes 26. The rotating member 16 further comprises a centrifugal propeller 27, arranged inside the basket 25 and in rotating use. 10 The centrifugal propeller 27 is configured to fractionate and project the foam on the collection wall 21. The foam reaches centrifugal propeller 27 moving along a path defined between the primary central opening 22 and the secondary central opening 23. 15 Inside the containment volume “V” of the tubular body 2 is housed a truncated conical separating wall 4, which has a sloping bottom that slopes towards the periphery of the tubular body 2. The separating wall 4 peripherally comprises a well of drainage 5 for the collection of any captured pollutants, 20 whether solid or liquid, and has a central inlet opening 6, to which a vertical neck 6' is connected. The 6' vertical neck has a circular cross-section with terminal parts arranged horizontally and is configured to convey the foams inside the tubular body 2 and subsequently in the collection body 15 25 of the lid 3. In particular, the vertical neck 6' ends near of the primary central opening 22 of the cover 3. In other words, the 6' vertical neck is essentially a cylindrical tube cable. The 6' vertical neck can be reversibly installed inside the 30 tubular body 2 and 6' vertical neck can be made in lengths variables. Inside the drainage well 5, there are collection means 7, 8 of the substances. The collection means, in a variant illustrated in figure 1, can include a vertical suction tube 7, exiting from the body 5 tubular 2, placed in depression by a motor organ 8. Alternatively, the collection media 7,8 can be defined by a pump suction, preferably a submersible pump. The foam therefore passes through the inlet mouth 6, runs along the neck vertical 6' attracted by the basket 25 and is fired by the centrifugal propeller 27 10 against the collection body 15 to be collected, in liquefied form, in the drainage well 5. An annular seal 9 is housed on the internal walls of the body tubular 2 and externally to the separating wall 4. The gasket 9 ensures the peripheral seal of the shooting wall 4 with respect to the inside 15 of the tubular body 2, such separating wall 4 being telescopically mobile. In particular, the separating wall 4 is configured to translate vertically with respect to the tubular body 2 thanks to integral vertical rods 10 below the separating wall 4. 20 The vertical rods 10 can be further configured through through the lid 3. Fastening means of known type can be inserted into annular grooves 11 obtained on the vertical rods 10, and can be used to position the wall separator 4 at various heights with respect to the lid 3. 25 The device 1 illustrated also includes tools for generating foams, thus effectively being a protein skimmer. In particular, with reference to figure 1, below the wall separator 4 and laterally to the tubular body 2 may be present, on the walls of the tubular body 2, a tangential inlet 12, of inclination and 30 note form, which contains an input organ 13, of type known, the operation of which leads to the formation of foam inside the tubular body 2. Alternative embodiments may include a device 1 lacking such tools for generating foam and being 5 dedicated exclusively to the reduction of foam and removal of the pollutants from them. With reference to figures 1 to 7, the cover 3 comprises a body of collection 15, shaped according to a substantially a bell, placed in the center of a flat base 24. Preferably, the body of 10 collection 15 has a base diameter greater than the mouth diameter of entrance 6 but less than the circular opening 20 of the tubular body 2. The collection body 15 is coupled to the flat base 24, preferably through a plurality of threaded screws 14. The flat base 24 is configured to overlap and completely cover the circular opening 20 of the body 15 tubular 2. The vertical rods 10 are preferably configured for cross the flat base 24. Alternative embodiments, as illustrated in Figures 9 and 10, can provide a collection body 15 shaped according to a cylindrical or truncated conical geometry. 20 With particular reference to cover 3, the secondary central opening 23 is located at the top of the collection body 15, which can be used for the connection between the rotating organ 16 arranged inside the body of collection 15 with a driving element 19 placed externally. Preferably, the rotating member 16 is driven via a shaft 18, 25 preferably vertical, interposed between the driving element 19 and the organ rotating 16. Therefore, preferably, the collection body 15 and the organ rotating 16 are coaxial to the inlet mouth 6 of the separating wall 4. Preferably, the cover 3 comprises a plurality of vent holes 17 30 for the release of excess gas and foam accumulated inside the collection body 15. Preferably, the vent holes 17 are made as small holes crossing the collection body 15 and arranged radially around the perimeter of the secondary central opening 23. The rotating member 16 is limited externally by the basket 25 which defines 5 a dome shape equipped internally with a chamber with perforated walls inside which the centrifugal propeller 27 is located. Preferably, the basket 25 has a substantially curved geometry. dome or cylindrical or truncated cone. In the present embodiment, the basket is made in a truncated cone shape. 10 and comprising a first base portion 28, a second base portion 28, base 29 and a lateral portion 30 with a circular section placed between the two. The second portion of base 29 is open, giving access to the interior of the basket 25. Preferably, both the first base portion 28 and the lateral portion 30 includes through holes 26. 15 With particular reference to figures 6, 7 and 8, the centrifugal propeller 27 comprises a central support 31 and a plurality of blades 32 arranged transversal to a plane of rotation of the central support 31 and developing radially with respect to the central support 31. The central support 31 is substantially cylindrical and axially 20 concentric with the axis of rotation of the basket 25 and, overall, coinciding with the axis of rotation of the rotating organ 16 itself. Therefore, the plane of rotation of the rotating member 16 is substantially perpendicular to the central support 31. Each blade 32 comprises a portion 33 proximal to the 25 central support 31 and a distal portion 34 with respect to the support central 31. The distal portion 34 has a superficial extension superior to the proximal portion 33. Each blade 32 of this plurality is arranged perpendicular to the plane of rotation of the rotating organ 16. According to embodiments not illustrated in the present figures, the blades 32 of the centrifugal propeller 27 can be made according to geometries and inclinations different from the illustrated embodiment. According to the embodiment illustrated in the present figures, the propeller 5 centrifuge 27 comprises a support disk 35 comprising a first facade 36, from which they develop perpendicularly in removal of the central support 31 and the blades 32, and a second facade 37, opposite the first facade 36, configured to be fixed in solidarity with basket 25. 10 In particular, both the support disk 35 and the propeller basket 25 centrifuge 27 are equipped with corresponding fixing holes 38, aligned in use and compatible with fastening devices, for example threaded ones. According to the embodiment illustrated in the present figures, the lid 3, may further comprise an inlet tube 40 15 connected to the collection body 15. The inlet tube 40 is configured to inject a flow of a liquid intercepting the basket 25 and the centrifugal propeller 27. The liquid can correspond to pure water or water containing additives of various kinds commonly used in the prior art. 20 According to a first embodiment, illustrated in figures 3 to 10, the inlet tube 40 is arranged on the collection body 15 in correspondence of the lateral portion 30 of the basket 25. According to a second alternative embodiment not illustrated, the inlet tube 40 is arranged on the collection body 15 in 25 correspondence of the first base portion 28 of the basket 25. In both embodiments, the outgoing water flow is configured to wet the basket 25 in rotating use, the flow having pressure adjusted according to the rotation speed of the basket 25 to penetrate through the through holes 26 of the basket 25, and graze the propeller 30 centrifuge 27 to facilitate the dissolution of the foam that is shot on the collection wall 21. With particular reference to figure 7, the cover 3 may comprise furthermore a separator disk 41 arranged transversely to the internal surface of the collection wall 21 and comprising at least one breathing opening 42, wherein the separator disk 41 is interposed between the 5 basket 25 and at least one vent hole 17 so as to define a path of labyrinthine foam slowdown. The breathing openings 42 together with the vent holes 17 are located in proximity of the tree 18 so as to channel the air into a region central, close to the shaft 18, of the collection body 15 so that the 10 air flow, generated by the basket 25, comes out from the lid 3 interfering with the as little as possible with foam. At the same time the breathing openings 42 are not coaxial with the vent holes 17 to force the air, exiting from cover 3, to take a longer path and tortuous so as to prevent the foam, carried by the air, from being able to 15 exit from the vent holes 17. According to the embodiment illustrated in the present figures, the disk separator 41 is arranged parallel to the plane of rotation of the basket 25 and the breathing opening 42 is made coaxial with the central opening secondary 23. The separator disc 41 has a through passage 43 20 centrally arranged through which the shaft 18 transmits the rotary motion supplied by the driving element 19. According to the embodiment illustrated in the present figures, the disk separator 41 comprises a plurality of breathing openings 42 arranged radially around the through passage 43. 25 Advantageously, the presence of the separator disk 41 equipped with the holes of breath 42 imposes, to the air and to foam particles possibly drag, a maze-like path that allows you to slow down and make deposit the foam inside the lid, before the foam reaches at least one vent hole 17 located on the collection body 15, 30 thus avoiding any possible escape of foam from the vent holes on the external surface of the collected wall 21. The separator disc 41 in this embodiment can be preferably fixed configuration. In the embodiment illustrated in the present figures, the disk separator 41 is preferably fixed to the flange of the driving element 5 19. According to an alternative embodiment, illustrated in figures 9 and 10, the improved foam removal device 1 is made hermetically sealed from the outside. In the figures, it was decided to represent as an example a 10 lid made substantially cylindrical. The collection body 15 of the lid 3 preferably comprises at least extraction duct 44, in use connected to a corresponding vent hole 17 and configured to achieve sealed fluid communication hermetically sealed with a fluid extraction medium. 15 Preferably, each extraction duct 44 in use is connected to a corresponding vent hole 17. In use, the extraction duct 44 is configured to provide a hermetically sealed fluid communication with a corresponding medium of fluid extraction not illustrated. 20 This second embodiment is particularly advantageous in how much, not only does device 1 have no foam leaks outside, but also allows you to safeguard the safety of operators in the presence of high concentration gas insufflations ozone without them leaving the basin. 25 In particular, the hermetically sealed device 1 prevents the leakage of such gases with a high concentration of ozone, therefore toxic, released by the fractionated foam inside the room where such device is located 1 is installed. The device 1 works as follows. The control organ 30 intake 13 introduces air or oxygen or other fluids or gases into the body tubular 2, imparting a tangential velocity to the water. This motion the resulting swirling of water and air causes the formation of foam and channels the light solid pollutants towards the centre of the vortex. The formation of foam is aided by the introduction of air, carried out from the intake organ 13. The foam that forms rises together with the 5 light solid substances along the inlet mouth 6 in the volume “V” up to reach the rotating organ 16 after having passed through the collection body 15. The foam bubbles, in contact with the perforated walls of the rotating organ 16, in particular of the basket 25 and of the centrifugal propeller 27, disintegrate and the liquid and the resulting residual and / or fractionated foam are projected from the 10 centrifugal motion of the basket 25 and of the centrifugal propeller 27, on the wall of collection 21 of the collection body 15. Subsequently the liquid percolates along the collection wall 21 and the solids settle on the bottom of the separating wall 4, ending up being conveyed inside the well of drainage 5. The centrifugal projection and the percolation of the liquid is 15 further improved by the addition of additional liquid through the inlet tube 40, this liquid contributes to the washing and cleaning action cleaning the collection wall 21 to maintain its transparency. At the same time, the presence of the separator disc 41 ensures that in In case of excessive foam, the excess foam can be 20 slowed down as much as possible and conveyed towards the basket 25. The disc separator 41 acts as a barrier to the escape of foam, slowing it down and flowing it back to basket 25 while a fraction minimum of foam eventually comes out at low speed from at least one such vent hole 17. The main fraction of the foam 25 fractionated accumulates at the bottom of the separating wall 4 in correspondence of the edges of the vertical neck 6'. In the drainage well 5 the separated substances are lifted out of the tubular body 2 via the suction pipe 7. Advantageously, the lid 3 as described above 30 allows a high degree of cleanliness and safety, both internally and device 1 which in the external environment allows a smaller number of machine stops to be carried out by operators. THE AGENCY Eng. Aldo Paparo

Claims

CLAIMS 1. Lid for the separation of foam (3), made transparent, configured in use to close at the top a device for the reduction and / or removal of foam (1), in which the lid (3) is shaped substantially concave and provided at the top with at least one vent hole (17), said lid (3) comprising: - a collection body (15), comprising a collection wall (21) configured to allow percolation of foam, a primary central opening (22) in use configured to face a containment volume (V) of the device (1) and a secondary central opening (23), arranged opposite and coaxial to said primary central opening (22) with respect to said collection body (15); - at least one rotating member (16) for the removal of foam, above and coaxial with respect to the primary central opening (22), comprising a basket (25), equipped with a plurality of through holes (26) and in rotating use;characterised in that said rotating member (16) comprises a centrifugal propeller (27), arranged internally to said basket (25) and in rotating use, to fractionate and project said foam onto said collection wall (21), said foam reaching said centrifugal propeller (27) along a path defined between said primary central opening (22) and said secondary opening (23).; 2. Lid for the fractionation of foams (3) according to claim 1, wherein said centrifugal propeller (27) comprises a central support (31) and a plurality of blades (32) developing radially with respect to said central support (31) and arranged transversely with respect to a plane of rotation of said central support (31), wherein each blade (32) of said plurality comprises a proximal portion (33) with respect to said central support (31) and a distal portion (34) with respect to said central support E1.A0017.12.IT.12 Ing. Aldo Paparo (Registered register no. 1281 BM) (31), wherein said distal portion (34) has a surface extension greater than said proximal portion (33).

3. Lid for foam fractionation (3) according to claim 2, wherein each blade (32) of said plurality is arranged perpendicular to a plane of rotation of said rotating member (16).

4. Lid for the fractionation of foams (3) according to claim 2 or 3, wherein said centrifugal propeller (27) comprises a support disk (35) comprising a first face (36), from which said central support (31) and said blades (32) develop perpendicularly away, and a second face (37), opposite to the first face (36) and configured to be fixed in a solid manner to said basket (25).

5. Lid for the fractionation of foams (3) according to one or more of the preceding claims, further comprising an inlet pipe (40) connected to the collection body (15) and configured to inject a flow of a liquid intercepting said basket (25) and said centrifugal propeller (27).

6. Lid for separating foam (3) according to one or more of the preceding claims, comprising a separator disk (41) arranged transversely to the internal surface of the collection wall (21) and comprising at least one breathing opening (42), in which said disk is interposed between said basket (25) and said at least one vent hole (17) so as to define a labyrinthine slowing path for said foam.

7. Lid for the separation of foams (3) according to claims 5 and 6, wherein said inlet pipe (40) is positioned in correspondence with said at least one breathing opening (42) of said separator disk (41). E1.A0017.12.IT.12 Eng. Aldo Paparo (Registered n. 1281 BM) 8. Lid for separating foam (3) according to claims 6 or 7, wherein said separator disc (41) is arranged parallel to the plane of rotation of said basket (25) and said breathing opening (42) is made coaxial with said secondary central opening (23).

9. Improved device for the reduction of foam (1) comprising: - a tubular body (2) oriented vertically and comprising a circular opening (20) at the top and a separating wall (4) internally configured for collecting liquids, wherein said separating wall (4) comprises at least one peripheral drainage channel (5) and at least one central inlet opening (6) for the foam to be reduced; and - a lid for the separation of foam (3), according to one or more of the preceding claims, configured to close the tubular body (2) at the top, wherein said primary central opening (22) is arranged coaxially with the circular opening of the tubular body (2) and wherein said rotating member (16) is above and coaxial respectively with the inlet opening (6) of the tubular body (2).

10. Improved device for the reduction of foam (1) according to claim 9, made hermetically sealed with respect to the outside, wherein said cover (3) preferably comprises at least one extraction duct (44) in use connected to a corresponding vent hole (17) and configured to create a hermetically sealed fluid communication with a fluid extraction means.