DE1632285A1 - Multi-chamber centrifuge - Google Patents

Description

The present invention also relates to the rotor of a double overflow rotary separator used in a Three-fraction mixture at the same time clarifies the heavy and light liquid fractions and the fraction the solids compacted

In the majority of all accumulated in the industry tasks the fraction of the light liquid is the vorherrsohenste and most valuable component of a three-fraction mixture _o Therefore, almost all Doppelüberlaufaentrifugen for Dreifraktionfiischungen to best deposition of the Group of the light liquid constructed from the remaining previous Flüsiigkeits-Feet material fraction, wherein the withdrawal

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the solids from the heavier liquid are hardly shown any interest. In those cases where the mixing of the heavy fluid to be maintained muli, were acceptable results through the use of fan-shaped secondary overflow pipes as the outlet for the Fraction of the weld liquid obtained from the separation zone of the centrifuge. Flat, elliptically shaped secondary overflow pipes reduce the outflow speed of the heavy liquid, and this in turn reduces the entrainment of the Solids through the heavy liquid. These results remain acceptable as long as the light fluid does the predominant component of the three-way mixture remains. As well as the heavy liquid compared to the light liquid in the mixture its subordinate importance loses, the increased flow in the area that adjoins the fan-shaped secondary pipes, tend not to give off the pesticides and to carry them back with them instead of expelling them.

As well as the heavy liquid constitutes the main part of the mixture and becomes the most important component for extraction, two basic centrifugal arrangements are applicable. The first writes about the separation of the solids from the a second centrifugation process for heavy liquids. Although such a process means increased capital investment and increased maintenance costs, it has so far been

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especially used for those three-fraction mixtures in which the difference in specific gravity between the heavy liquid and the pests low and thereby a separation of the pesticides from the heavy liquid is not easily possible. The second option is to use it a centrifugal separator having a first and a second separation chamber. Acceptable results are achieved through the described facilities achieved as long as the components of the three-fraction mixture clearly differ and there is a clear gap between the relative specific weights of these components «as well as the two of the Fractions become difficult to separate from one another, prohibits the remixing peculiar to these or similar devices their application.

The present invention eliminates any remixing of the components after their separation so that a three fraction mixture with a predominant part of heavy liquid in a single centrifugation process can be separated. The remixing of the fractions is caused by the damming up of the partially separated component of the feed during the entire separation process prevented in the disk pyramid. After the three-fraction mixture has been separated into a light fraction and a Fraction, consisting of liquids »and solids the light fraction from the disk pyramid in one direction

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derived and the partially separated heavy liquid Fes tat off mixture flows up in the opposite direction a passage which is arranged in the disk pyramid between the first and second separation chambers to. The uninterrupted flow into the primary separation chamber provides the thrust to move the heavy liquid-solid mixture through the opening to the secondary separation chamber. The partially separated mixture consisting of heavier liquid and solids, is determined by the potential difference between the material outside the Disk pyramid and the inside of the disk pyramid at the outflow from the disk pyramid into which the solids hindered compacting area; the greater the radial distance from the axis of rotation, the greater the speed and thus the potential, i. the energy. The mixture from within the disk pyramid Heavier liquid and solids does not have sufficient energy to stand immediately on the periphery of the The mixture located on the disk pyramid and the deposited aggregate solids outside the disk pyramid to push aside. The mixture of heavy liquid and solids is pushed from one side and held back by the other and must thereby follow the path of least resistance, i.e. the passage between the Flow through primary and secondary separation chamber. This will absolutely prevents the mixture consisting of heavy liquid and solid material from being carried by the deposited solid

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substances flows through it, and there is no risk that the deposited solids will be entrained again by the mixture will.

Remixing is further avoided by the fact that the separated fractions are unhindered by the inflow or by a partially separated mixture as well as without re-contact with another separated fraction to their corresponding Flow outflow openings. As already stated, the separated from the inflow moves in the primary separation chamber light liquid from the disk pyramid in the opposite direction to the flow of the heavy liquid-solid mixture out. As the solids are torn out of the heavy liquid in the secondary chamber, move the solids move in one direction and the heavy liquid flows in the opposite direction. Each of the Phases after their separation are diverted away from the other fractions and from the inflow as well as the partially separated mixtures, so that even the most difficult to separate liquid-liquid-solid compounds be absolutely prevented from re-letting them.

To the complete cleaning of the heavy liquid to ensure that secondary separation chamber and the outflow of heavy liquid openings that extend into the S _a mmelweg the light liquid have. So is everyone

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light liquid that is still from the heavy liquid could have been entrained into the secondary separation chamber separated by the disks in the secondary separation chamber and introduced into the collection path of the light liquid, or should any light liquid stop its flow continue with the heavy liquid into the passage opening of a heavy liquid, there is an additional one Possibility of separating and collecting and thus complete clarification of the liquids.

According to the invention is a rotor for a centrifugal separator provided, with an inlet, conveyor elements for transporting a multiple fraction inflow material into the Inlet provided with a primary and secondary separation chamber a number of longitudinally arranged cutting discs in order to split the supplied substance into at least two components, characterized in that the separation disks of the primary separation chamber are provided with a first row of openings are to distribute the flow of material to the discs, wherein at least one of the fractions of the substance inflow is separated off, while the remaining substance inflow is added the secondary separation chamber through a second series of openings is transferred within the separating disks of the primary and secondary separating chamber, with a further separation of the Substance influx is effected

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So that the invention can be easily understood and applied, it is explained using an example and with the help of the accompanying drawings:

Fig. 1 is a side view of a three-phase centrifugal separator, incorporating the present invention;

Fig. 2 is a half plan view of the rotor showing the underflow outlet nozzle and the location of the inlet and outlet Drain channels within the disk pyramid;

Figure 3 is a portion of the enlarged top plan view of the improved disk pyramid in the centrifugal separator according to FIG. 1.

Referring now to the drawings, there is shown a centrifuge 10 in practice of the present invention to show. However, it must be borne in mind that the present invention is not particularly applicable in its application disclosed centrifuge is limited.

According to FIG. 1, the centrifuge 10 has a rotor 12 which is fastened to a vertical rotatable shaft 14 is. The rotor 12 has a double conical housing 16 and a matching cover 18, which is secured by a clamping ring 20 is held in place. The housing 16 and the

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Lids 18 have matching interlocking ring shoulders and 24, which are expediently sealed by an O-ring 26 will.

A slightly conical tube with a plurality of equidistantly attached and axially extending ribs 30 surrounds the shaft 14 and is mounted on a rotor hub 32 to so to form an inlet 34. Multiple fraction feedstock is the inlet 34 through a channel 35, which is between an inner and outer concentric tube 36, 38 is fed. The rotor hub 32 is generally conical and forms one with the housing 16. Part and is attached to the shaft 14 with the aid of a feather key 40 and a nut 42.

An annular feed accelerator 44 is mounted on the rotor hub 32 and extends outwardly from the inlet 28 and a plurality of radially extending ribs (not shown) having an outwardly extending one Form channel 46 for the feed material. A peripheral part of the accelerator is compliant with the housing by a Sealing ring 50 connected. The ribs 30 in the inlet 34 serve to give the feed material a rotary movement, to drive the feed material downwards and outwards to the channels 46. A plurality of separation chambers 52, 54 (Pig. 3) fill the space in the rotor by arranging them one above the other above the feed accelerator 44 so as to get the feed material into its to separate proportionate components. Tn this particular as

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In the example intended application, only two separation chambers are used shown, but it goes without saying that if a feed to be separated has more than three fractions, additional chambers, as described in the disclosure, can be used without affecting the general Invention idea is left. The primary combustion chamber 52 is composed of a series of fixed annular cutting disks 56 which are divided into wedge-shaped sections 58 are divided by radially extending spacers 60 (FIG. 2). The feed material is drawn from the channels 46 into the primary separation chamber 52 through a plurality of one Ring of channels 62 arranged in the accelerator 44 are pumped. A series of openings 64 penetrates the channels 62 and extends vertically through the discs with one opening per wedge-shaped portion 58 of the disc so as to form a flow distribution channel 66.

.The feed rises through the openings 64 and flows on the disks 56 where centrifugal force did the first separation of the mixture into light liquid and partially separated Heavy liquid-solid mixture makes. Due to the pressure caused by the incoming feed material caused by the ascent in the channel 66 and by the exit on the discs 56, the light moves Liquid to the axis of rotation. The separated light liquid flows in the primary chamber along the disks until they are into the collecting channels 68 between the axially extending

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Ribs 70 in the chamber 72 pours. The ribs 70 prevent the light liquid from being in the chamber 72 rises and is excreted via the dam 74 as a primary overflow to develop a cross flow =.

The partially separated mixture of heavy liquids and solids moves in the opposite direction as the separated light liquid, namely along the disks to the outside, until it crosses the conduit 76. The partially separated heavy liquid-solids mixture is determined by the relative Potential difference between the mixture inside the cutting disks and the solid sludge outside the cutting disks prevented from flowing further along the disks and out of the primary separation chamber into the area of solids compaction to pour, needn't run that, ever The greater the radial distance from the axis of rotation, the greater the speed and, correspondingly, the energy level these particles. Although the radial component of the speed and, correspondingly, the radial component of the energy of the Particles in the centrifugal separator is relatively small, has the heavy liquid-solids mixture on the cutting discs relative to the energy of the solid sludge outside the cutting disks do not have enough force to press the solid sludge against the walls of the rotor to ao a To expose the path for the heavy liquid solids mixture,

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Because no other path is open, the mixture of heavy liquids and solids is forced between the cutting discs to remain and move through the transfer channels 76, thereby causing re-entrainment of deposited Solids are absolutely avoided by the mixture. In addition, to ensure that there is no mixture of heavy liquids and solids from the primary separator into the area 77 of the solids compaction a phase separator 78 is provided between the primary and secondary chambers. The phase separator 73 is an annular one Disk of enlarged diameter, which extends outwards over the cutting disks 56 to a point exactly above extends from the foot portion 82 of the accelerator 44 so as to form an orifice 84. The mouth 84 is permitted no significant passage of the heavy liquid / solid mixture into the solid compression area 77, but allows that particularly heavy particles, which by the separation process in the Pr ^ aartrennkammer from the heavy-liquid-solid mixture were precipitated to pass through. These heavy particles pass through the mouth 84 and rise into the solid matter compression area of the rotor.

The secondary separation chamber 54 extends from the phase separator to the rotor cover 18 and, like the primary separation chamber, has 52 on a series of supported annular disks 86, the radial sighting extending through not shown

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Disc spacers are divided into wedge-shaped sections. The transfer channel 76 is a number axM. extending openings, namely one per wedge-shaped disk section, which extends vertically over the full length of the primary separation chamber 52 through the phase separator 78 and over the full length of the secondary separation chamber 54 in order to transfer the partially separated heavy liquid / solid mixture from the primary separation chamber also be a channel within the number of aligned bores with at least one opening for receiving and discharging the partially separated mixture per series of discs. The mixture is evenly distributed over the secondary cutting disks 86 due to the balanced back pressures, and the centrifugal forces act on them in such a way that the solids are separated from the liquid according to the known cutting disk principle.

The heavy liquid moves inwards, i.e. to the axis of rotation until it hits the discharge tubes 90 for the heavy Liquid encounters. An ejection tube 90 is inserted into the disk pyramid for each wedge-shaped disk section. The tubes have slots 92 in their outer wall long as they pass through the secondary separation chamber 54 by hand jin the primary separation chamber 52, these tubes are not

hits slits. Where the pipe 90 on the phase separator 78 / Lst a seal 94 is provided to prevent heavy fluid from leaking out of the tube and from heavy fluid

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Solid matter mixture enters the pipe. The exhaust pipes 90 guide the heavy liquid into channels 96 and from there it is excreted from secondary overflow via a dam 98 «

light liquid, which may be caused by the heavy liquid solids dissolution entrained and transferred through the "transfer channel 76 into the secondary separation chamber continues to flow inward toward the axis of rotation until the light liquid is released from the disks 86 and falls into channel 68 so as to combine with the remainder of the separated light liquid. Should If any light liquid is carried by the heavy liquid in the tubes 90, it is a skim hole 100 is provided on the inner surface and at the top of the tube to thereby remove the light liquid rise and drain. This light liquid will also move inwardly along discs 86 to channel 68 move.

The heavy liquid in the secondary separation chamber The separated solids move outward from the disks and accumulate in the area of the solids compaction 77 for the subsequent charge from the rotor.

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So iat it can be seen that the remixing once separated fractions is avoided by the fact that the divided ! Fractions are forced to aich from each other by the feed material and by the partially separated Sehwerenflüasigkeits-Featstaffmiachung to move away during their breakup

The light liquid is separated from the heavy liquid solid odor in the primary separation chamber; the light liquid moves inwards to the cotation axis in order to flow off in the channels 68, the heavy liquid featst off mixture moves outwards away from the axis of rotation around transfer channel 76. In the secondary separation chamber the solids move _/ as they are eliminated from the liquid are outwardly into the area of solids compaction 77 and the heavy liquid moves inward to flow into the tubes 90. As can be seen from FIG. 2, the inflow channel 66 and the transfer channel 76 are arranged in the primary separation chamber 52 so that the inflow substance spreads between these two sets of channels from the inflow channel 66 towards the separating section ^ and the light liquid continues to move during their separation from the heavy liquid-solids mixture unhindered by the opposite direction of flow of the feed material to the outlet channels 68. In the same way, the heavy liquid-solid matter is distributed over the separating section between the transfer channel 76 and 90 ₁ after it has passed through the transfer channel 76 into the secondary separation

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Chamber 54 has passed. The solids expelled by the action of the cutting discs move unimpeded by any reverse flow of heavy liquid-solid mixture out of the slices. As soon as the heavy liquid has separated from the separation section, nothing prevents their movement between this section and the discharge tube 90 · By the fact that any possibility of remixing is eliminated, the most difficult-to-separate mixture can be effective and become permanently separated.

The solids are in the compression zone 77 through Centrifugal force pressed into a path 110 on the circumference of the rotor 12, to then from the rotor by a Number of evenly attached discharge nozzles 112 in the spiral-shaped chamber of the surrounding housing (not shown here) to be expelled. A return 114, to which the solids from the spiral chamber are fed, enters m the rotor through port 116 to recirculate some of the underflow discharge. The underflow is fed back to the system in order to achieve the desired Overflow-underflow balance and the desired Maintain concentration of the discharge underflow · A washing liquid can be fed into the system through the line 118, which flows into the return 114 before it enters the rotor, are added to the accumulated solids to be removed. The re-blocked lower reaches, either with

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or with no wash fluid, it is pressurized from inlet 116 through nozzle 120 into reflux accelerator 122. Of the Accelerator 122, which is attached to housing 16 by a threaded bushing 124, carries an accelerator ring 126, which forms the opening 127 of the return accelerator 122. The return accelerator accelerates the re-inserted underflow with the aid of radially extending ribs 128 and presses this in return pipes 130 so that it is in the solids compression area 77 can flow.

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Claims (4)

Claims 1. Rotor for a centrifugal separator with one inlet, Conveying elements for conveying a multiple fraction feed material in the inlet of a primary and secondary separation chamber with a number of longitudinally arranged separation, disks for separating the supplied substance into at least 2 components ^ characterized in that the separating disks the primary separation chamber are provided with a first row of openings to distribute the flow of material to the disks, wherein at least one of the fractions of the feedstock is separated off, while the remaining feedstock is separated to the secondary separation chamber through a second row is passed over from openings within the separating disks of the primary and secondary separating chambers, one further separation of the substance inflow is effected. 2. Apparatus according to claim 1, characterized in that the primary separation chamber with at least one row of successive Orifices are provided to distribute the multiple fraction material flow to the cutting discs. 3. Apparatus according to claim 1, characterized in that the primary separation chamber is provided with at least one channel with at least one opening for each of the separation disks in order to allow the multiple fraction material to flow to the To distribute Treimacheiben » - 18 109809/0057 - 4. Device according to one of claims 1 to 3, characterized in that that the remaining staff inflow to the secondary separation chamber through a channel in the separation discs which is provided with at least one opening for receiving and dispensing the component to be transferred is. 5. Apparatus according to claim 1, characterized in that a fraction separated in the primary separation chamber in at least one longitudinally extending channel drains off, the channel extending at least from the first disc of the primary separation chamber extends to at least the last disc of the secondary separation chamber and the channel its outflow next has its end in the secondary separation chamber » 6. Device according to one of the preceding claims, characterized in that a separated in the secondary separation chamber Fraction by at least one longitudinal .direction extending channel is derived, the Channel extending through the separation discs in the primary and secondary separation chambers to near its end in the primary separation chamber to unload 7t device according to claim 6, characterized in that the channel has at least one opening in the secondary separation chamber having. - 19 109809/0057 8. Apparatus according to claim 6, characterized in that the other separated in the secondary separation chamber Fraction is separated from the separating discs of the secondary separation chamber and is located between the inner wall of the rotor and the secondary separation chamber is deposited * 9. Apparatus according to claim 5, characterized in that the separating disks in the secondary separating chamber into one eject longitudinally extending channel to a fraction separated in the primary separation chamber which is associated with the remaining material flow was entrained in the secondary separation chamber to release <> 10. The device according to claim 7, characterized in that the channel has a first and a second opening in the Having secondary separation chamber, the first opening which receives the fraction separated off in the secondary separation chamber and the second opening is one that is separated in the primary separation chamber, but into the by the remaining substance flow Secondary separation chamber released entrained fraction transferred and discharged into the channel. 11. Device according to claim 1 to 4-, characterized in that that conveying devices are provided for transporting the material inflows from the inlet to the primary separation chamber, consisting from an accelerator corresponding to the shape of the primary separation chamber, which is connected with a phase separator between the primary 109809 / 005T - 20 - separation chamber and the secondary separation chamber interacts, to discharge the remaining substance inflow from the primary separation chamber through other than those in Longitudinally extending openings or channels between to prevent the primary separation chamber and the secondary separation chamber 12. The device according to claim 11, characterized in that the phase separator between the primary and secondary separation chamber is a disc extending in the transverse direction, the disc to form an opening delimited on both sides has a portion parallel to the corresponding part of the accelerator. 109809/0057 Blank page