EP0904156B1 - Apparatus for the separation of heavier from lighter fractions in aqueous slurries by means of centrifugal force - Google Patents

Abstract

The invention relates to a process and apparatus for the separation of heavier from lighter fractions in aqueous slurries by means of centrifugal force. The slurry is made to spin in the separation chamber under the influence of the differential pressure generated between the inlet and outlet of a cyclone separation chamber (4). The differential pressure, which can amount to several bar, is generated by means of a pressure increasing stage in the form of a transport rotor device (20) which acts in conjunction with a stator arrangement (22); essentially this takes place immediately in front of the inlet of the slurry into the separation chamber (4). The rotor blades of the cyclone rotor device (10) as the rotor blades of the transport rotor device (20) can be mounted on the same rotary shaft (5) in order to induce additional rotary force into the slurry. The separation of floatable fractions in aqueous slurries is effected by the presence of micro gas bubbles introduced into the separation chamber (4). The separated floatable fractions can be removed from the gas bubbles to which they adhere by means of an anti-foaming device driven by the rotary shaft (5) of the transport rotor device (20).

Description

The invention relates to a device for Separate the heavier from the lighter parts aqueous turbidity by means of centrifugal force.

The invention relates in particular to the cleaning of liquid turbidity with a proportion of solid particles below a certain dimension, i.e. on the After-cleaning of turbidity through sieves or the like a pre-cleaning to remove coarser particles have undergone.

When separating using centrifugal separators or Hydrocyclones becomes a pre-cleaned high turbidity Speed introduced into a deposition chamber so that there is an intensely rotating laminar Flow field forms, so the heavier portions of the Turbidity caused by centrifugal force on an external one Diameter web can be pressed while the lighter ones Portions of the cloudiness preferably close to the central longitudinal axis of the Collect the deposition chamber. It is known from US-A-2 701 642, DE-T-3 390 449 to forcibly introduce rotational energy into the slurry introduced into the separation comb by means of a rotor device With a well-known Centrifugal separator (US-A-2 996 187) is used for the Flow of the turbidity between the inlet and outlet of the Separation chamber required pressure drop through a Suction transport rotor device applied, the downstream the outlet of the deposition chamber is provided. The Pressure drop between inlet and outlet is therefore due to the Determined suction power of the suction transport rotor device and the in turn is due to the pending on the intake side Liquid column set so that by means of Suction transport rotor device a pressure drop of only less than 1 bar can be created. The known Centrifugal separators can therefore only be used for suspensions can be used where sufficient Separation effect even at relatively low Rotational speeds of the slurry is obtained. Around less easily separable parts from aqueous turbidity treat, are higher rotational speeds in the Deposition chamber required to be high To generate centrifugal forces. This would create a pressure drop of some bar require that of the known Centrifugal separators can not be applied, so that you generally have several small dimensions Centrifugal separator had to be arranged one behind the other to get on a desired deposition rate to come. This makes it more expensive significantly the acquisition and operating costs of Separation plant and increases its susceptibility to maintenance. The Throughput of small centrifugal separators is also comparatively low, so that use with it equipped systems for certain applications is limited.

Effective separation poses a particular problem floatable particulate matter from aqueous turbidity by means of centrifugal force. In US-A-4,397,741 proposed for the flotation separation, in which in a Separation chamber circulating turbidity also has a gas bring in to create gas bubbles, one of which expects this to be affected by interface effects attached heavier portions of the cloudy matter. The Gas bubbles form a kind of buoyancy body, so that the heavier parts not only near the central longitudinal axis of the Separation chamber prefers to collect, but also counter can be subtracted from the force of gravity. The However, the effectiveness of this known device is low, since the deposition effect alone on a tangential Introduction of the slurry into the separation chamber is based on Measures increasing the pressure drop are completely absent, and moreover the gas bubbles achievable with the known means one too have large dimensions.

The invention is based on the object to create a device of the type mentioned at the outset, the the required high rotation speeds creates to with all kinds of cloudiness including such treat floatable parts with high effectiveness can.

To solve this problem, the claims referred. Was surprising in the context of the invention found that with known centrifugal separators related problems in a simple manner without significant Complication of the system can be eliminated by doing what is required for high rotational speeds Pressure drop of a few bar due to pressurization the cloudy immediately before they enter the Deposition chamber is applied. There is one Transport rotor device upstream of the inlet provided that acts in the manner of a radial accelerator and cooperates with a stator device which the kinetic energy generated by the transport rotor device in the slurry was introduced, converted into pressure energy. Thereby ensures that the inlet side of the deposition chamber always a sufficient gradient overpressure on the turbidity is exercised regardless of a flow pressure in is a line over which the turbidity to the Centrifugal separator is guided, and also independently of the height of the liquid column between the inlet and outlet the deposition chamber. As a result, an increased Rotation speed with correspondingly increased Deposition rate can be applied. In that a effective separation largely independent of the Dimensions of the centrifugal separator is below accordingly favorable effects on the operating and Acquisition costs of separators with larger dimensions or larger diameters than in known systems come.

By the provision of the arranged on the inlet side Transport rotor / stator devices achieved improvements in the effectiveness of the deposition can be further increased be, if according to a development of the invention in the Additional turbidity in the separation chamber Rotational energy is introduced. This can be done that a cyclone rotor device in the deposition chamber is arranged, which of the same axis of rotation as that Transport rotor device can be driven. The Cyclone rotor device allows increased turbulence free and the type of introduction of the slurry into the separation chamber independent rotation speeds, the one of the Cyclone rotor device counter pressure exerted by the pressure is overcome by the inlet side Transport rotor device exerts on the slurry.

Due to the measures described, the invention especially for the flotation separation of otherwise difficult to separate by centrifugal force Slurries, e.g. for the removal of printing ink residues slurried waste paper materials. A related one Further development of the invention therefore provides that the Separation of the slurry is carried out in the presence of gas bubbles is, preferably in the presence of micro gas bubbles. This can a liquid interspersed with micro gas bubbles into the Separation chamber introduced for mixing with the slurry become, or the cloudy is fumigated and fumigated itself Condition introduced into the deposition chamber. One in one Centrifugal separator top housing with axial clearance arranged to the transport rotor device Foam destruction device with rotatably driven Rotor blades can be provided to by means Centrifugal effect the foreign substances adhering to the gas bubbles in a frothy from the deposition chamber Separate gas bubble-foreign substance mixture and separate after dissipate outside.

Overall, one according to the invention is distinguished Centrifugal separator by a comparatively straightforward construction from all mentioned Rotor devices arranged on a common rotary shaft could be. The centrifugal separator also has sucking effect and can therefore be easily without Pump accessories in a flow system as a driver for a slurry to be treated can be integrated.

Fig. 1 in teilweise längsgeschnittener Ansicht einen Zentrifugalabscheider gemäss einer bevorzugten Ausführungsform der Erfindung,

Fig. 2A-2C ein Detail des Zentrifugalabscheiders nach Fig. 1 in Gesamtansicht (Fig. 2A), Unteransicht (Fig. 2B) und Draufsicht (Fig. 2C),

Fig. 3 eine geschnittene Ansicht längs der Schnittlinie III-III in Fig. 1,

Fig. 4 in einer Ansicht ähnlich Fig. 1 einen Zentrifugalabscheider nach Fig. 1 gemäss einer zweiten Ausführungsform der Erfindung,

Fig. 5 einen Zentrifugalabscheider gemäss einer dritten modifizierten Ausführungsform der Erfindung, und

Fig. 6 einen Zentrifugalabscheider für die Flotationsabscheidung gemäss einer vierten Ausführungsform der Erfindung.

The invention is explained in more detail below with the aid of embodiments and the drawing. Show it:

1 is a partially longitudinal sectional view of a centrifugal separator according to a preferred embodiment of the invention,

2A-2C a detail of the centrifugal separator according to FIG. 1 in overall view (FIG. 2A), bottom view (FIG. 2B) and top view (FIG. 2C),

3 shows a sectional view along the section line III-III in FIG. 1,

4 shows a view similar to FIG. 1 a centrifugal separator according to FIG. 1 according to a second embodiment of the invention,

5 shows a centrifugal separator according to a third modified embodiment of the invention, and

6 shows a centrifugal separator for flotation separation according to a fourth embodiment of the invention.

In the following, reference is made to FIGS. 1, 2A-2C and 3, which show a centrifugal separator according to the invention. The reference number 1 in FIG. 1 relates to a tubular one cylindrical housing that is funnel-shaped Floor area 2 merges, which leads to a removal opening 3 tapered at the bottom. The housing 1 defines one Separation chamber 4, in the coaxial to the central longitudinal axis a hollow shaft 5 protrudes with its lower axial open end ends at a suitable distance from the plane, from which the funnel-shaped area 2 downwards extends.

At the upper, protruding from the housing 1 axial end of the Hollow shaft 5, a coupling device 7 is provided with a drive device 8, e.g. in the form of a Electric motor, is connected to the hollow shaft 5 with a suitable rotation speed in rotation.

In the embodiment of the invention shown, the Hollow shaft 5 storage-free only by the drive device 8 supported. If desired, could be used to support the Hollow shaft 5 with respect to the housing 1 is also a suitable one Bearing arrangement may be provided.

2A and 2B show an intermediate one axial position of the hollow shaft 5, a mounting plate 12 attached, e.g. welded, the hollow shaft 5 in one radial plane surrounds. On the underside of the mounting plate 12 are a multitude of at the same angular distance from each other Rotor blades 11 attached radially by the hollow shaft 5 protrude outwards to close to the inner circumference of the housing 1. In the embodiment shown, there are four rotor blades 11 intended. However, more or less such can also be the case Rotor blades may be provided.

The rotor blades 11 form a cyclone rotor device, which in Fig. 1 bears the general reference numeral 10 to one in the Separation chamber 4 forcibly introduced liquid slurry for a circular movement along the inner wall of the housing 1 to initiate. As a result of the centrifugal forces that occur will the heavier portions of the turbidity close to the Collect the inner wall of the deposition chamber 4 while the lighter portions get inside the hollow shaft 5 and from there can be discharged to the outside, whereupon later is discussed in more detail.

1, 2A to 2C further show is on the top the mounting plate 12 has a plurality of rotor blades 21 attached, starting from the hollow shaft 5 in essentially spiral radially outwards to one point at a distance D from the central longitudinal axis of the hollow shaft 5 extend that is larger than the diameter d of one of the outer ends of the rotor blades 11 of the cyclone rotor device 10 described arc or the radial dimension of the Deposition chamber 4 is. The rotor blades 21 can, like shown to be a suitable short measurement over the exterior Protruding the peripheral edge of the mounting plate 12. Preferably the ratio D: d is between about 1.25: 1 to 1.75: 1, most preferably around 1.50: 1.

The rotor blades 21 are part of a Transport rotor device, the general in Fig. 1 Reference number 20 bears and with a stator 22 cooperates, which is shown in more detail in Fig. 3.

The stator device 22 comprises a plurality of stationary guide elements 23, which are in a radial Level below the level of the rotor blades 21 of the Transport rotor device 20, preferably spiral, from a radially outer location corresponding to the dimension D in 2A extend to a radially inner location, the essentially with the inner circumference of the housing 1 matches. The guide elements 23 are with their inner end regions preferably substantially aligned tangentially to the inner circumference of the housing 1. Passages 24 are located between adjacent guide elements 23 defines the slurry into the separation chamber 4 can get in. The guide elements 23 of the Stator 22 protrude like the rotor blades 21 of the Transport rotor device 20 outside over the peripheral edge of the Mounting plate 12 so that between the Stator device 22 and the transport rotor device 20 a fluid connection is created.

As FIG. 1 further shows, the radially outer areas are the rotor blade 21 of the transport rotor device 20 and the Guide elements 23 of the stator 22 in one flange-shaped chamber 25 added in an above the housing 1 arranged top housing is formed, which bears the general reference number 6.

The stator device 22 has the task of a Speed of rotation of the turbidity caused by the Transport rotor device 20 to brake, causing the turbidity is placed under an overpressure before it is tangential over the passages 24 in the deposition chamber 4 and in the Area of influence of the cyclone rotor device 10 reaches where you a circular movement by the cyclone rotor device 10 is imposed. The speed of rotation of the turbidity in the Deposition chamber 4 is the effective area and speed of the Rotor blades 11 of the cyclone rotor device 10, the Throughput and through the tangential entry of the slurry influenced in the deposition chamber 4.

In the above-described embodiment, the Cyclone rotor device 10 and transport rotor device 20 mounted on the same hollow shaft 5 as a drive shaft, so that they rotate at the same speed. If wanted, could also have separate drive shafts for the Cyclone rotor device 10 and transport rotor device 20 be provided to them at different speeds operate.

The slurry is, as shown in FIG. 1, via an inlet connector 30 introduced into an anteroom 31 of the top housing 6, the with the transport rotor device 20 is connected.

The lighter by the action of the cyclone rotor device 10 separated portions of the slurry are under the by the transport rotor device 20 to created pressure drops a flow into the hollow shaft 5 causes and leave the hollow shaft 5 through a plurality of openings 9 which are close the upper end are formed in the hollow shaft 5. From there they enter an antechamber 32 in the outlet Attachment housing 6, which surrounds the hollow shaft 5 and with a Outlet connection 33 is connected.

In the embodiment of the invention shown, the Turbidity on essentially the same radial plane in the Centrifugal separator on which it leaves, like this is shown in Fig. 1. The inlet and outlet ports could however, as will be explained later, also on different radial planes.

The separated heavier parts of the slurry collect as a result of gravity in the funnel-shaped bottom area 2 of the housing 1 and can from there through the removal opening 3 continuously or at suitable time intervals be discharged outside. The removal opening preferably has 3 an adjustable opening width.

Fig. 4 shows a modified simplified embodiment a centrifugal separator according to the invention particularly suitable for the treatment of turbidity with light separable foreign matter. Same or similar Wear components as in the previously described embodiment the same reference numbers, increased by the number hundred. This Embodiment differs from the previous one essentially described in that the Cyclone rotor device is omitted and consequently the circular motion solely due to the tangential Introduction of the slurry into the deposition chamber 104 and the Overpressure is caused by the upstream side of the Inlet-arranged transport rotor device 120 and Stator device 122 is applied.

As shown, the transport rotor assembly 120 has one modified training by the rotor blades 121 only up to the outer circumference of the mounting plate 112 so that an annular space 126 in the outer circumference of the mounting plate 112 Top housing 106 is defined, in which the slurry under the Effect of the transport rotor device 120 can flow to in to reach the area of influence of the stator device 122. It it was found that these measures resulted in a Improvement of the efficiency of the transport rotor / stator devices 120, 122 can be achieved. If if desired, such a modified one Transport rotor device also in the embodiment of Invention according to Figure 1 can be provided.

Furthermore, the cylindrical portion of the housing 101 compared to the previously described embodiment suitable dimensions shortened and the conical to the outlet opening 103 extending section 102 extended accordingly. With regard to further construction details, FIGS. 1 to 3 and the associated description is referenced.

In the following, embodiments of Centrifugal separators according to the invention, which especially for fine flotation separation of prefiltered turbidity or sludge with one after the Pre-filtration remaining residual foreign matter small size, e.g. 2 mm or less are suitable.

5 shows an embodiment of a flotation centrifugal separator, of the construction of the Feeding device for feeding the slurry, consisting of the Introducer 230 and the vestibule 231, the upstream side the inlet into the deposition chamber 205 Transport rotor device 220 with stator device 222 for upstream pressurization of the turbidity and the Cyclone rotor device 210 essentially the 1 corresponds, so that reference to this can be taken. The same or similar components as for the embodiment described above carry the same Reference number, increased by the number two hundred.

As shown, the transport rotor means 220 and the cyclone rotor device 210 on a common one Drive shaft 254 arranged, which are not simultaneously to Removal of a separated portion of the treatment Cloudy serves. Furthermore, the effective area of the rotor blades 211 the cyclone rotor device 210 compared to the embodiment 1 can be reduced by the axial dimensions the rotor blades are lowered.

As shown, housing 201 is continuous cylindrical formation, so that also continuous cylindrical deposition chamber 204 is formed. A den Bottom 252 of the housing 201 axially penetrating tubular Element 255 with open ends protrudes inside the Deposition chamber 204 so that an open end of the tubular element 255 at a suitable distance from the Bottom 252 of the housing 201 comes to rest while the other open ends arranged outside the housing 201 is. The tubular element 255 is preferably opposite the housing 201 held axially displaceable. The tubular Element 255 is used to discharge the following Flotation separation described fine Foreign matter proportions of the cloudy.

The liquid cleaned of the foreign substances or the Clear run can be discharged via an outlet port 253, the near the bottom 252 of the housing 201 tangentially into the Deposition chamber 204 opens out.

At an intermediate axial point of the housing 201 is a device for introducing one, a suitable one Gas, such as air, containing liquid in the Deposition chamber 204 is provided. The facility includes an annular distribution line 256, one Surrounds the peripheral region of the housing 201, in which the Perforations 257 penetrate the housing wall. In the Distribution line 256 also opens an inlet connector 258. The liquid with the gas can therefore through the inlet port 258, the distribution line 256 and the perforations 257 ins Interior of the deposition chamber 204.

The liquid is preferably one in which the gas is distributed in the form of microbubbles with a dimension of, for example, 100 μm or less. Such liquids permeated with micro gas bubbles can be created, for example, with a device which bears the reference number 259 in FIG. 5 and can be designed according to DE-A-3733583, to which reference can therefore be made. The device 259 is connected to a fumigation container 260, into which the liquid to be fumigated and a suitable gas can be introduced separately and pressurized.

Water can be used as the liquid. It can thereby also, as shown, around a branched part of the over act the outlet port 253 clear run by this via a pump 261 into the gassing container 260 passed, there charged with the gas and into the Device 259 for generating the micro gas bubbles introduced becomes.

In the deposition chamber 204, those on the introduced into the slurry as described above Micro gas bubbles due to their surface tension with the fine floatable foreign matter components of the cloudy, which therefore preferred under the acting centrifugal forces near the center longitudinal axis of the centrifugal separator accumulate. The micro gas bubbles with the adhering ones Foreign matter can therefore through the central tubular Element 255 discharged from the deposition chamber 204 are removed while the clearing at the outlet port 253 can be.

It should be noted that instead of one with micro gas bubbles penetrated the gas directly into the liquid Deposition chamber 204 could be introduced to in the To create cloudy gas bubbles. To use gas bubbles to create the smallest possible dimensions, that should Introduction of the gases via a diffuser ring (not shown) made from a fine-grained sintered metal that instead distribution line 256 would have to be provided.

Furthermore, the cyclone rotor device 210 could be omitted so that the circular motion of the turbidity is similar to 4 alone on the pressure-increasing effect of the interacting transport rotor and stator devices 220, 222 and the tangential Introduction of the slurry into the deposition chamber 204 based would.

Furthermore, the discharge of the micro gas bubbles could be included adhering foreign substances in a similar manner to the Embodiments of the invention according to FIGS. 1 and 4 via a central hollow shaft take place against the effect of gravity, which is also the common axis of rotation of the Transport rotor device 220 and cyclone rotor device 210 would represent.

6 shows a flotation centrifugal separator according to a fourth embodiment of the invention. Same or similar components to those described above Embodiments have the same reference numerals, increased by the number three hundred. The fourth embodiment of the The invention comprises a continuously cylindrical housing 301, which also has a cylindrical deposition chamber 304 Are defined. Upstream of an inlet in the Separation chamber 304 are for pressurizing the slurry a transport rotor device 320 and one with it cooperating stator 322 provided, the Structure and operation of those of the embodiment Fig. 1 correspond, so that there is a new description superfluous. Similar to the embodiment of FIG. 4 a cyclone rotor device omitted.

A feature of the centrifugal separator of FIG. 6 is one Foam destruction device that the general Reference number 370 carries. The foam destroyer 370 includes a variety of, around a central axis that preferably with the axis of rotation of the rotor blades 321 Transport rotor device 320 coincides, rotatable Rotor blades 371, which are in a space 372 in a above the Separation housing 301 arranged top housing 306 are arranged. Room 372 is the one above Transport rotor device 320 and stator device 322 containing space 373 arranged in the top housing 369, in the slurry to be treated via an inlet connection 374 can be introduced. In particular, the Inlet nozzle 374 a cloudy, in the micro gas bubbles are dispersed, are introduced. The micro gas bubbles can, as indicated at 359, by means of a device be introduced into the slurry as it is in connection with the embodiment of FIG. 5 has been described.

The rooms 372 and 373 in the add-on housing 369 are sealed from each other, and further up is the upper space 372 into a lower one, the rotor blades 371 of the Area 372 'containing foam destruction device 370 and divides an upper region 372 "that is close to the Hollow shaft 305 in fluid communication with the lower region 372 ' stands. The lower region 372 'opens out Foreign substance outlet connection 376. The peripheral wall of the Top housing 369 is along top portion 372 '' of a plurality of circumferentially distributed perforations 377 which penetrates the inside of the upper area 372 '' a gas outlet port 378 to connect from the separated foreign substances removed gaseous components after to be able to discharge outside.

The rotor blades 371 of the foam destruction device 370 can, as mentioned, on the same axis of rotation as that Rotor blades 321 of the transport rotor device 320 mounted his. The axis of rotation is designed as a hollow shaft 305 axially extends into and into the deposition chamber 304 has lower open end into which the secluded to the Foreign matter adhering to gas bubbles can enter from where they rise inside the hollow shaft 305 and into space 372 of the foam destruction device 370 and thus in the Area of influence of rotor blades 371.

One near the bottom 379 of the deposition housing 301 tangential outlet nozzle 380 is used for discharge of the liquid parts of the Cloudy or clear running.

In the foam destruction device 370 the in the Room 372 came to foreign substances adhering to the gas bubbles through the rotor blades 371 in a circular motion so that the heavier foreign matter due to Centrifugal effects are separated from the gas bubbles and accumulate on the inner circumference of the lower area 372 '. The gas bubbles, on the other hand, rise to the top Room area 372 '' from where they follow in the manner mentioned above can be discharged outside.

Instead of introducing a pre-fogged slurry over the Inlet port 374 could treat the turbidity in the Deposition chamber 304 in the presence of gas bubbles too by separating the gas from the turbidity according to the embodiment of FIG. 5 in the Deposition chamber 304 is introduced.

Furthermore, a cyclone rotor device could, if desired similar to the embodiment of the invention according to FIG. 1 be provided. In this case, the driven hollow shaft 305 successively the rotor blades 371 the foam destruction device 370, the rotor blades 321 of the Transport rotor device 320 and the rotor blades of the added cyclone rotor device for common rotation be mounted by the drive device 308. It understands however, that is similar to the others above-described embodiments of the invention as well independent drive shafts for driving said Rotor blades can be provided.

Claims (7)

1. Centrifugal-force-separation equipment to separate the heavier and the lighter parts in water based suspensions by means of centrifugal force-effect, with a separation-chamber (4, 104, 204, 304) and an equipment for the production of a pressure-inclination between the in - and outlet of the separation-chamber, so that the suspension is induced into the separation-chamber by a circling movement, and an equipment to take away the light parts, and an equipment to take away the heavy parts of the suspension from the separation-chamber, characterised by, that for the production of a pressure-inclination a rotation axis (5, 105, 254, 305) rotary driven transportation-rotor-equipment (20, 120, 220, 320) in an extra casing (6, 106, 206, 306) of the separation device is arranged, which transportation-rotor-equipment combines directly upstreampage with the admittance of the separation-chamber of provided stator-equipment (22, 122, 222, 322) and has a radial measurement (D), that is larger than the radial measurement (d) of the separation-chamber, to put the suspension essentially directly before injected into the separation-chamber under overpressure.
2. Centrifugal-force-separation equipment in accordance with claim 1, characterised by, that in the separation-chamber (4, 204) a cyclone-rotor-equipment (10, 210) is arranged to bring in additional rotation-energy into the suspension, which is driven from the same rotation axis (5, 254) like the transportation-equipment (20, 220).
3. Centrifugal-force-separation equipment in accordance with claim 1 or 2, characterized by, that the relationship of the radial measurement (D) of the transportation-equipment (20, 120, 220, 320) to the radial measurement (d) of the separation-chamber (4, 104, 204, 304) is between approximately 1,25: 1 and 1,75: 1.
4. Centrifugal-force-separation equipment in accordance with claim 1, marked through an equipment (256-26, 359) to bring in gas bubbles into the separation chamber (204, 304).
5. Centrifugal-force-separation equipment in accordance with claim 4, characterized by, that the equipment (256-261, 359) to bring in gas bubbles includes a gas tank (260) to bring in a gas into a liquid and a relaxation device standing with the gas tank in liquid connection (259, 359) to the production of micro-bubbles in the gassed liquid.
6. Centrifugal-force-separation equipment in accordance with claim 4 or 5, marked through a foam-destruction-equipment (370) arranged in the extra casing (306) with axial distance to the transportation-equipment (320) with rotary driven rotor-wings (371) for the separation of foreign materials adhesive at the gas bubbles by means of centrifugal force-effect in a frothy gas-bubbles-foreign material-mixture which was brought out from the separation-chamber (304).
7. Centrifugal-force-separation equipment in accordance with claim 6, characterized by, that the rotor-wings (371) of the foam-destruction-equipment (370) and that of the transportation-equipment (320) are driven of the same rotation axis (305).

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