• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    To control the sludge concentration of a separated component, separated sludge is recirculated back to the separation chamber of a centrifugal separator at a controlled rate by letting the sludge pass through a channel formed such that the magnitude of the recirculated flow will be dependent on the sludge viscosity. If the viscosity of the separated sludge increases, the amount of recirculated sludge is reduced, and vice versa. The separator of the invention provides for such sludge recirculation within the centrifuge rotor itself. Arranged centrally in the rotor, in addition to a reception chamber (10) for separated sludge, is a recirculation chamber (14) to which sludge is transferred from the reception chamber (10). An overflow outlet (15) maintains a free liquid surface in the recirculation chamber (14) at a predetermined radial level. Recirculation channels (16), formed so that the flow therethrough will be controlled automatically according to the viscosity of the separated sludge, conducts sludge from the recirculation chamber (14) back to the radially outermost parts of the separation chamber (5).
    公开号:SU1743339A3
    申请号:SU874202131
    申请日:1987-03-11
    公开日:1992-06-23
    发明作者:Крук Геран；Карлссон Пер
    申请人:Альфа-Лаваль Сепарейшн, Ав (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to equipment for separating suspensions in a field of centrifugal forces.
    A centrifugal separator is known, comprising a rotor having a separation chamber, equipped with a pipeline for supplying a separable mixture, a device for draining the minor component of the mixture and maintaining its surface at a first radial level, and a device for diverting a heavy component containing the receiving chamber of the latter and communicating with with the separation chamber, discharge channels with means for limiting the flow of the heavy component, and a device for recycling a part of the heavy component consisting of the recirculation chamber, which serves to return a certain amount of the separated heavy component to the separation chamber above the level of the means for limiting the flow of the heavy component, and communicating with it at least one channel to return the heavy component to the separation chamber having dimensions while increasing the viscosity of the selected heavy component, they reduce its flow, and when the viscosity decreases, its increase, and the device for feeding a part of the separated
    a heavy component from the receiving chamber to the recirculation chamber.
    The known design of the centrifugal separator cannot provide sufficiently accurate control of the concentration of the heavy component, since it takes a long time for the heavy component to flow from the device to divert it from the rotor to at least one channel
    returning the heavy component to the separation chamber.
    The purpose of the invention is to improve the accuracy of controlling the concentration of the heavy component exiting the rotor.
    To achieve this goal in the proposed centrifugal separator containing a rotor having a separation chamber, equipped with a pipeline for supplying the mixture to be separated, a device for removing the light component of the mixture and maintaining its surface at the first radial level and a device for withdrawing a heavy component and communicated with
    and with the separation chamber, discharge channels with means for limiting the flow of the heavy component, and a device for recirculating a part of the heavy component consisting of a recirculation chamber located in the rotor
    to return a certain amount of the selected heavy component to the separation chamber above the level of the means for limiting the flow of the heavy component, and at least one channel communicating with it to return the heavy component to the separation chamber having dimensions that provide with an increase in the viscosity of the selected heavy component decreases its flow, and when the viscosity decreases, its increase, and the device for feeding a part of the separated heavy component from the receiving chamber to the recirculation The chamber, the receiving chamber of a heavy component with branch channels is placed inside the rotor and is equipped with a device for removing the heavy component and maintaining the surface of the hard component at the second level in the receiving chamber radially external to the first level of the light component layer. to maintain the surface of the heavy component in the recirculation chamber at a level close to the rotor axis, and to generate a flow of the selected heavy component from this chamber through the channel elogo component in the separation chamber and means for feeding a heavy component from the reception chamber to the recirculation.
    The means for maintaining the surface of the heavy component in the recirculation chamber at a level close to the rotor axis can be made in the form of an aperture. A device for removing the heavy component from the receiving chamber and maintaining the surface of the layered component at the second level in the receiving chamber located radially outwardly relative to the first level of the light component layer should consist of a centrally installed pipeline and associated nozzles with By this means, the supply of the heavy component from the receiving chamber to the recirculation unit is a hole made in the pipeline.
    FIG. 1 schematically shows a separator rotor, a longitudinal section; in fig. 2 - part of the separator rotor; in fig. 3 - separator rotor, variant; in fig. 4 - the upper part of the rotor.
    The centrifugal separator comprises a rotor consisting of a cover 1 and a base 2, interconnected by a clamping ring 3, and having a separation chamber 4 equipped with a pipeline 5 for supplying the mixture to be separated, a device for removing the light component of the mixture and maintaining its surface on the first radial
    the level, which is a pressure disc 6, a device for withdrawing a heavy component, containing the receiving chamber 7 of the latter and communicating with it and with the separation chamber diverting channels 8 with means 9 for limiting the flow of the heavy component, plate holder 10 and a package of conical separating plates 11, and a device for recycling a portion of a heavy component, consisting of a recirculation chamber 12 located in the rotor, serving to return a certain amount of the heavy component recovered to the separation chamber Above the level of the location of the means for limiting the flow of the heavy component, and communicating with it at least one channel 13 for returning the heavy component to the separation chamber, having dimensions that ensure that its viscosity increases, the reduced heavy component decreases its flow and viscosity - its increase, the receiving chamber 7 is formed by a partition 14, which is made conical and strengthened on the base 2 of the rotor. In addition, the partition is made in the form of an annular disk attached in the upper part of the rotor to the wall of the channel 8.
    A receiving chamber 7 with discharge channels 8 is placed inside the rotor and equipped with a device for removing a heavy component from it and maintaining the surface of the hard component at the second level in the separation chamber located radially outwardly relative to the first level of the light component layer consisting of nozzles 15 and a central conduit 16 connected thereto, means to maintain the surface of the heavy component in the recirculation chamber at a level close to the rotor axis, and to form a flow of selected gravity The component from this chamber is through a return duct of the heavy component into the separation chamber 4, which should be made in the form of an opening 17, and the means for feeding the heavy component from the receiving chamber to the recirculation one, which is an opening 18 made in the central pipeline 16 The means 9 for limiting the flow of the heavy component is a choke 19 located at the outlet of each discharge channel 8. The recirculation chamber 12 in the rotor of the separator is formed by a cone-shaped partition. oh 20 having radially smaller dimension than that of the partition 14, and connected thereto.
    The channels 8 have a much larger diameter than the channels 13. The throttles 19 in the channels 8 completely determine the flow through them. Each choke has a very small size; therefore, the changes in viscosity of the separated heavy component, which flow through channels 8, expected during operation, should not significantly affect the flow rate through these channels.
    Each channel 13 has a flow area along the entire length that is so small relative to its length that the viscosity of this component greatly influences the flow rate of the separated heavy component through it. Under other constant conditions, an increase in viscosity leads to a decrease in flow through the channels 13. Concentric to the central pipeline 16 are located pipeline 5 for supplying the mixture to be separated and pipeline 21 for removing the light component of the mixture. The central pipe 16 is provided with a constant pressure valve 22. A similar valve can be installed on the pipe 21.
    A conduit 5 for supplying the mixture to be divided communicates through an opening 22 with a central inlet chamber 23. Inside the plate holder 10, radial vanes 24 are attached to its base. The central inlet chamber 23 communicates with the separation chamber 4 through the spaces between the radial blades 24 and through the holes 25 in the base plate holders.
    The rotor (Fig. 3) contains the upper plate 26, while the outflow channels 8 and the channels 13 for returning the heavy component are located between it and the cover 1 and are formed, for example, by means of radial grooves on the outer surface of said plate. The rotor also has an upper annular wall 27 connected to the lid 1 by means of a clamping ring 28. The receiving chamber 7 in this construction is formed by an end wall 27 and a partition 14. In the upper part of the rotor, annular partitions 29 and 30 are also fixed. Circulating chamber 12 is formed by an annular a baffle 29 and a baffle 14. The annular baffle 30 has an annular overflow opening 31 for transferring the light component from the separation chamber 4 to the discharge chamber 32 in which the pressure disc 6 is located. The rotor is mounted on the drive Mr. Shaft 33.
    In the rotor (Fig. 4) there is an additional element, which is a ring spool 34 capable of being rotated around its own axis and the axis of the rotor. The spool 34 has a tubular part located in the radial direction between the annular walls forming the central pipeline 16 and the pipeline
    21 respectively. At the lower end of the tubular part of the spool 34 has an outer annular groove 35, open up. Part of the element forming the central pipeline 16 enters this chute from above
    0 down. Below gutter 35 in the zone of the recirculation chamber 12 are tubular parts of the spool
    34 has a radial through hole 36. A similar hole 37 is located on the diametrically opposite side in the outer wall of the pipe 21. The radially outer wall of the pipe 16 located in the groove 35 has a radial-hole, which is previously mentioned
    0 a hole 18 through which a part of the separated heavy component can flow from the receiving chamber 7 to the recirculation chamber 12. To enable such movement, the radially outer side wall of the groove
    35 has a corresponding through hole 38.
    Centrifugal separator operates as follows.
    0 The suspension through conduit 5 enters the inlet chamber 23, from which, through the gaps between the radial vanes 24 and the orifices 25, it flows into the separation chamber 4. In the stack of plates 11, the suspension is separated, while the heavy component is collected in the rotor slurry space, and the light component flows in the direction of the rotor axis and is continuously output through the pressure disc 6 and
    0, conduit 21, the heavy component accumulated in the rotor's slurry space enters the channels 8 and through them into the receiving chamber 7. From there, the heavy component flows through the connections 15 to the central conduit 16 and is led out of the rotor. A portion of the heavy component from this pipeline, through the opening 18, enters the recirculation chamber 12 and from it through the channels 13 to the periphery of the separation chamber 4. An excess amount of heavy component flows through the opening 17 back into the receiving chamber 7.
    During the operation of the separator, 22 constant pressure clap5 is automatically controlled so that the nozzles 15 maintain a predetermined radial level of the free surface of the heavy component in the receiving chamber 7. The nozzles length in the flow direction is so small that the flow rate of the component through them is essentially independent changes in its viscosity.
    Depending on the changes in viscosity (concentration) of the heavy component, it enters the recirculation chamber 12 more or less, while the heavy component enters through the channels 13 into the deposition zone, or flows through the opening 17 into the receiving chamber 7. With increasing viscosity a smaller part of the heavy component will flow through the channels 13 and at the same time its flow will increase through the opening 17. Thus, if the viscosity of the heavy component and its flow through the opening 17 increases, then the removal of compo that through tubes 15 and central conduit 16.
    When using the rotor design shown in FIG. 4, the spool 34 is in the position shown during operation. At the same time, the openings 18 and 38 are located opposite one another and, therefore, a through flow from the conduit 16 to the recirculation chamber 12 is possible. At the same time, the opening 37 is closed by the lower part of the slide 34.
    When the separator rotor needs to be cleaned, the spool 34 is rotated 180 ° around its axis, with the result that the bottom hole 36 in the spool will face the opening 37. At the same time, the non-opening part of the side wall of the groove 35 closes the opening 18. This will prevent the return of the liquid entering the receiving chamber 7 from the radially outer parts of the separation chamber 4 into it through the recirculation chamber 12 and the channels 13. As a result, all this liquid will be withdrawn from the rotor through the pipeline 16.
    However, a portion of the heavy component exiting the separation chamber 4 through the overflow opening 31, the discharge chamber 32 and the conduit 21. flows through the openings 37 and 36 into the recirculation chamber 12, which ensures that this chamber and the channels 13 are flushed.
    The proposed separator design makes it possible to increase the accuracy of controlling the concentration of the heavy component as compared with the known separator.
    F o rumlula and z o breetn
    权利要求:
    Claims (3)
    [1]
    1. A centrifugal separator comprising a rotor having a separation chamber, equipped with a pipeline for supplying the mixture to be separated, with a device for removal. light component of the mixture and maintain its surface at the first radial level and a device for removing
    a component containing the receiving chamber of the latter and communicating with it and with the separation chamber discharge channels with the means of limiting the magnitude of the flow of the heavy
    component, and a device for recycling a part of a heavy component, consisting of a recirculation chamber located in the rotor, serving to return a certain amount of heavy
    the component into the separation chamber is above the level of the means for restricting the flow of the heavy component, and communicating with it at least one channel for returning the heavy component to the separation chamber having dimensions which ensure that its viscosity increases, reducing its heavy component and with a decrease in viscosity, an increase in it, which is the fact that, in order to increase the accuracy of controlling the concentration of the heavy component coming out of the rotor, the receiving chamber of the heavy component with exhaust channels are placed inside the rotor and equipped with a device for removing a heavy component from it and maintaining the surface of the layer component at the second level in the receiving chamber located radially outwardly relative to
    the first level of the light component layer, means for maintaining the surface of the heavy component in the recirculation chamber at a level close to the rotor axis, and forming a flow of selected heavy
    a component from this chamber through the return path of the heavy component to the separation chamber and means for feeding the heavy component from the receiving chamber to the recirculation one.
    [2]
    2. The separator of claim 1, wherein the means for maintaining the surface of the heavy component in the recirculation chamber at a level close to the axis
    rotor, made in the form of a hole.
    [3]
    3. Separator according to claim 1, characterized in that the device for removing the heavy component from the receiving chamber and maintaining the surface of the hard
    The component at the second level in the receiving chamber, located radially outwardly relative to the first level of the light component layer, consists of a centrally installed pipeline and associated
    with it, the nozzles, wherein the means for feeding the heavy component from the receiving chamber to the recirculation one is a hole made in the pipeline.
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    FIG, H
    类似技术:
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    同族专利:
    公开号 | 公开日
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1103258B|1959-04-03|1961-03-23|Separator Ab|Centrifuge with a peeling device, the peeling edge of which is adjustable in the radial direction|
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    NL284711A|1961-11-29|
    CH451823A|1966-05-23|1968-05-15|Alfa Laval Ab|Process for the smooth introduction of a liquid into a centrifuge and centrifuge for carrying out the process|
    US4067494A|1977-01-03|1978-01-10|Dorr-Oliver Incorporated|Nozzle type centrifugal machine with improved slurry pumping chambers|
    DE2701624C2|1977-01-17|1983-03-17|Westfalia Separator Ag, 4740 Oelde|Continuously operating drum for concentrating suspended solids|
    US4162760A|1978-07-10|1979-07-31|Pennwalt Corporation|Disc centrifuge with underflow discharge|
    DE2842967C2|1978-10-02|1984-08-16|Westfalia Separator Ag, 4740 Oelde|Continuously operating drum for concentrating suspended solids|DE3627826C2|1986-08-16|1995-02-09|Westfalia Separator Ag|Centrifugal drum|
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    SE461019B|1988-05-02|1989-12-18|Alfa Laval Marine Power Eng|CENTRIFUGAL SEPARATOR WITH A PUMP BODY, ESTABLISHED TO ACHIEVE A CIRCULATION OF LIQUID IN A CIRCULATION CIRCUIT|
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    US5300014A|1992-10-16|1994-04-05|Dorr-Oliver Corporation|Underflow control for nozzle centrifuges|
    DE19613215C1|1996-04-02|1997-09-25|Westfalia Separator Ag|Centrifugal drum|
    US6312610B1|1998-07-13|2001-11-06|Phase Inc.|Density screening outer wall transport method for fluid separation devices|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8601153A|SE452260B|1986-03-12|1986-03-12|Centrifugal separator arranged for exhaustion of a separated product with a specific concentration|
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