• 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:
    A centrifugal separator has for returning separated sludge to the separation chamber of the rotor a recirculation circuit (27, 28, 33, 39, 41, 43, 32, 30, 29) which is completely free of flow restricting nozzles. The amount of separated sludge allowed to leave the centrifugal separator through the outlet conduit (39) without being recirculated is determined by setting valves (22, 40) in the stationary outlet conduits (21, 39) for the separated sludge and clarified liquid, respectively.
    公开号:SU1716958A3
    申请号:SU874202127
    申请日:1987-03-11
    公开日:1992-02-28
    发明作者:Крук Геран
    申请人:Альфа-Лаваль Сепарейшн, Аб (Фирма)；
    IPC主号:
    专利说明:

    among themselves by means of a clamping ring 4, a separating chamber 5, a central channel 6 for supplying the initial suspension, a package of conical plates 7, central channels 8 and 9 for separated light and heavy fractions, the first fixed means 10 forming the inlet cavity 11 with the inlet channel 12 communicated with the central channel for supplying the initial suspension, the second fixed means 13 forming the output cavity 14c by the discharge channel 15 for the separated light fraction communicated with the central rotor channel for this fraction, the third movable means 16 forming the outlet cavity 17 with an outlet channel 18 for the heavy fraction, connected to the central channel of the rotor of this fraction, a central receiving chamber 19 located in the rotor and communicating with the central channel for supplying the initial suspension, located in the rotor first channels 20, connecting the central receiving chamber with the separation chamber, the second channels 21 connecting the area of the light fraction of the separation chamber with the central channel for the separated light fraction, the third channels 22, the accumulation zone of the heavy fraction of the separation chamber with the central channel for this fraction, the pump 23 connected to the first fixed means 10, the locking means 24 and 25 for adjusting the ratio between the light and heavy fractions withdrawn from the rotor and the device for recycling the part separated a heavy fraction, which must include 26, connected via pipelines 27-29 to outlet 18 for the heavy fraction of the third fixed means. 1 il.
    The invention relates to equipment for separating suspensions in the field of centrifugal forces.
    A centrifugal separator is known that includes a rotor mounted on a shaft, containing a separation chamber, a central channel for supplying the initial suspension, central channels for separated light and heavy fractions, the first fixed means forming the inlet cavity with the inlet channel communicating with the central channel for supplying the initial suspension of the rotor, the second fixed means forming the output cavity with the outlet channel for the separated light fraction, communicated with the central channel of the rotor for this fraction, tr This fixed means forming the outlet cavity with the outlet channel for the heavy fraction, connected to the central channel of the rotor of this fraction, the central receiving chamber located in the rotor and communicating with the central channel for supplying the initial suspension, located in the rotor the first channels connecting the central receiving the chamber with the separation chamber, the second channels connecting the zone of the light fraction of the separation chamber with the central channel for the separated light fraction, the third channels telling e accumulation zone of the heavy fraction from the separation chamber to the central channel of this fraction, pump,
    connected to the first stationary means for supplying the initial suspension to the central receiving chamber of the rotor, locking means for adjusting the ratio between the light and heavy fractions discharged from the rotor and the device for recirculating a part of the separated heavy fraction into the separation chamber.
    A disadvantage of the known centrifugal separator is that when the content of the heavy fraction in the suspension fed to the rotor is small, the same particles of this fraction are recycled again and under repeated pressure changes in the channels are destroyed, which leads to deterioration this fraction.
    The purpose of the invention is to improve the quality
    the heavy fraction by allowing the recycling rate to change regardless of the desired concentration of the heavy fraction.
    To achieve this goal, a centrifugal separator comprising a rotor mounted on a shaft, containing a separation chamber, a central channel for supplying the initial suspension, central channels for separated light and
    heavy fractions, the first fixed means forming the input cavity with the inlet channel in communication with the central channel of the rotor for this fraction,
    third fixed means forming
    an outlet cavity with an outlet for the heavy fraction, connected to the central channel of the rotor of this fraction; a central receiving chamber located in the rotor and communicating with the central channel for supplying the initial suspension, the first channels located in the rotor connecting the central receiving chamber with the separation chamber, the second channels connecting the light fraction location zone of the separation chamber with the central channel for the separated light fractions, the third channels that communicate the accumulation zone of the heavy fraction of the separation chamber with the central channel for this fraction, the pump connected to the first fixed means d l supply the initial suspension in. the central receiving chamber of the rotor, the locking means for adjusting the ratio between the light and heavy fractions flows withdrawn from the rotor and the device for recirculating the part of the separated heavy fraction into the separating chamber is provided with sealing means tightly connected with the rotor and with the corresponding first the second and third fixed means for isolating the rotor's internal space from the environment, while the device for recycling a part of the separated heavy fraction to the separating chamber The core has a means for sealing it, and the pump is designed to maintain such pressure during operation that provides a hydraulic connection of the inlet channel of the first fixed means through the inner space of the rotor with the outlet channels of the second and third fixed means. A device for recirculating a part of the separated heavy fraction into the separation chamber should contain a pump, connected by pipelines, to the discharge channel of the heavy fraction of the third fixed means.
    The drawing schematically shows the proposed centrifugal separator, a longitudinal section.
    A centrifugal separator comprising a rotor mounted on a shaft, a squeezing cover 2 and a base 3 connected to each other by means of a clamping ring 4, a separating chamber 5, a central channel b for supplying the initial suspension, a package of conical 7, central channels 8 and 9 for separated light and heavy fractions, the first fixed means 10 forming the entrance cavity: 11 with inlet duct 12 communicated with
    the central channel for supplying the initial suspension, the second stationary means 13 forming the output cavity 14 with the outlet channel 15 for the separated light fraction communicated with the central channel of the rotor for this fraction, the third stationary means 16 forming the output cavity 17 with the outlet channel 18 for heavy fractions united
    O with the central channel of the rotor of this fraction, the central receiving chamber 19 located in the rotor and communicating with the central channel for supplying the initial suspension, located in the rotor
    5, the first channels 20 connecting the central receiving chamber with the separation chamber, the second channels 21 connecting the zone of location of the light fraction of the separation chamber with the central channel
    0 for the separated light fraction, the third channels 22, communicating the accumulation zone of the heavy fraction of the separation chamber with the central channel for this fraction, the pump 23 connected to the first stationary means 10 for supplying the initial suspension to the central receiving chamber of the rotor, the locking means 24 and 25 to regulate the ratio between the light and heavy flows discharged from the rotor
    0 fractions and a device for recycling a part of the separated heavy fraction, which should include a pump 26 connected via pipelines 27, 28 and 29 to the exhaust channel 18 of the heavy fraction
    5 of the third fixed means.
    . The separator is equipped with sealing means 30-33, tightly connected to the rotor and with the corresponding first, second and third fixed
    0 with means for isolating the inner space of the rotor from the environment, while the device for recycling a part of the separated heavy fraction into the separation chamber has means 34 for its
    5, the sealing and the inlet 35 to which the pipe 29 is connected. The sealing means 30 comprises an upper non-rotating sealing ring which is hermetically connected to the second fixed means 13 and the surrounding inlet channel 12, and a lower rotating sealing ring which is hermetically connected to the rotating inlet pipe 36, forming the central channel 6
    5 for supplying the initial suspension. These two rings in the axial direction hermetically adjacent to each other, and it is preferable that the upper sealing ring is pressed in the axial direction down to the lower spring (not shown / ((/
    on). Other sealing means 31, 32 and 33 and means 34 for sealing the device for recycling a part of the separated heavy fraction into the separation chamber have a similar construction. The second channels 21 connecting the zone of the light fraction of the separation chamber 5 to the central channel 8 for the separated light fraction are formed by a tubular element associated with the rotor cover by the clamping ring 36.
    The pump 23 is designed to maintain, during operation, such a pressure that provides the hydraulic connection of the inlet channel of the first fixed means through the inner space of the rotor with the outlet channels 15 and 18 of the second and third fixed means.
    A package of conical plates 7 is fixed on that reel to a holder 37, inside which are reinforced radially distributing blades 38, between which the first channels 20 are located, connecting the central receiving chamber 19 with the separating chamber 5. At the bottom of the base 3 is installed with a cylindrical sleeve 39 40. In the sleeve 39, pipes 41 are secured, inside of which third channels 22 are located, communicating the zone of accumulation of the heavy fraction of the separation chamber 5 through channels 42 with the central channel 9 for draining this fraction.
    In a conical partition 40, pipes 43 for recirculation, which extend radially inward from the parts of the separation chamber 5 most distant from the axis, are fastened. The internal cavity of these pipes is connected with channels 44, which radially toward the center of the rotor, and pipe 45, installed inside the shaft 1 and having a channel 46 for feeding recirculated heavy fractions into pipes 43. A central channel 9 for removing the separated heavy fraction is located between pipe 45 and the inner wall of shaft 1. The outlet of pump 23 is connected via pipe 47 to an inlet duct scrap 12 of the first stationary means 10. The locking means 24 is mounted on the conduit 48 connected to the outlet 15 for the separated light fraction.
    The centrifugal separator works as follows.
    The suspension is fed to the rotor by means of a pump 23. It flows through the central channel 6 into the central receiving chamber 19 of the rotor and further between the distribution vanes 38 through the channels 20 into the separation chamber 5.
    In this chamber 5, the solid fraction is separated from the mixture and collected in the parts most remote from the center of this chamber. The separated light fraction flows radially inward and out of the separation chamber through the channels 21, the outlet 15 and the pipe 48 is removed from the rotor.
    Under the action of the overpressure of the pump 23, the separated crucible fraction and a small amount of the remaining liquid are squeezed radially inwards through pipes 41 and further along channels 42, the central channel 9 to the outlet channel 18. Through the pipeline 27, part of the heavy fraction is removed and the rest of the heavy fraction is returned via pump 26 to separation chamber 5 via pipelines 28 and 29, channels 46 and 44, and pipes 43.
    Depending on the solids content in the feed mixture and its desired concentration in the fraction to be discharged through the exhaust line 27, the closure means 24 and 25 are installed so that a certain required connection between the flow rates through them is ensured. The locking means 24 and 25 thus serve as chokes in the pipelines 48 and 27, respectively, and are connected hydraulically with a rigid connection to each other and to the pump 26 at the inlet through the separation chamber 5.
    The pump 26, which has an adjustable speed, is controlled in terms of capacity so that the required degree of recycling of the solid fraction is ensured. The determining factor here is, first of all, the determined required flow rate in the pipes 41. This speed must be large enough so that the particles of the solid fraction, which must move radially inward in the direction. pipes 41, overcome the resistance of centrifugal force and separated from a small amount of carrier fluid in which they were weighed.
    If during operation the content of sediment in the supplied suspension changes, it is preferable to provide means for automatically changing the load of at least one of the locking means 24 and 25. Such means may contain various types of sensitive elements that are arranged to control the load at least at least one of the locking means 24 and 25. Sensitive elements may be
    embedded in one of the pipes 47, 48 and 27. In the pipe 47, a change in the solids content of the feed slurry can be directly perceived. In conduit 48, it can be perceived through an increase or decrease in the amount of solid particles remaining in the light fraction. In line 27, it can be perceived through an increase or decrease in the concentration of the solid fraction. In all cases, the perceived change will cause the load to be controlled by one of the locking means 24 and 25, or both. This will allow maintaining the concentration of the solid fraction and its amount accumulated in the centrifuge rotor at a constant level.
    The proposed separator design makes it possible to improve the quality of the heavy fraction.
    权利要求:
    Claims (2)
    [1]
    Claim 1. Centrifugal separator comprising rotary mounted on shaft, containing separating chamber, central channel for supplying initial suspension, central channels for separated light and heavy fractions, first stationary means forming the inlet cavity with inlet channel communicated with the central channel for supplying the initial suspension of the rotor, the second fixed means forming the output cavity with the outlet channel for the separated light fraction, communicated with the central channel of the rotor for this third fractional means forming the output cavity with the outlet channel for the heavy fraction, connected to the central channel of the rotor of this fraction, central receiving chamber located in the rotor and communicating with the central channel for supplying the initial suspension, located in the rotor first channels connecting the center
    a secondary receiving chamber with a separating chamber, second channels connecting the zone of the light fraction of the separating chamber with the central channel for the separated light fraction, third channels indicating the accumulation zone of the heavy fraction of the separating chamber with the central channel for this fraction, the pump connected to the first stationary means for supplying the initial suspension to the central receiving chamber of the rotor, shut-off means for adjusting the ratio between the light and heavy fraction withdrawn from the rotor and a device for recycling a part of the separated heavy fraction into the separation chamber, characterized in that, in order to improve the quality of the heavy fraction by allowing the recirculation rate to vary, regardless of the desired concentration of the heavy fraction, the separator is equipped with sealing means, hermetically connected to the rotor and to the corresponding first, second and third fixed means for isolating the rotor's internal space from the environment, while the device for recirculating a part about The separated heavy fraction in the separation chamber has means for sealing it, and the pump is designed to maintain such pressure during operation that provides for the hydraulic connection of the inlet channel of the first fixed means through the inner space of the rotor to the outlet channels of the second and third fixed means.
    [2]
    2. Separator pop. 1, characterized in that the device for recirculating a part of the separated heavy fraction into the separation chamber comprises a pump connected by means of pipelines to the exhaust channel of the heavy fraction of the third fixed means.
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE3762811D1|1990-06-28|
    JPS62254855A|1987-11-06|
    CN1007785B|1990-05-02|
    EP0241128B1|1990-05-23|
    JPH0763653B2|1995-07-12|
    SE8601154D0|1986-03-12|
    BR8701113A|1987-12-29|
    CN87101854A|1987-09-23|
    US4759744A|1988-07-26|
    SE8601154L|1987-09-13|
    SE462077B|1990-05-07|
    EP0241128A1|1987-10-14|
    引用文献:
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    US3204868A|1960-06-06|1965-09-07|Dorr Oliver Inc|Three-product nozzle-type centrifuge|
    US3204686A|1963-03-26|1965-09-07|Robertshaw Controls Co|Combined manual and safety valve control|
    DE1802676A1|1967-10-17|1969-04-30|Alfa Laval Ab|Device for displaying the sludge level in the sludge chamber of the rotor of sludge centrifuges|
    SE324337B|1968-10-14|1970-05-25|Alfa Laval Ab|
    SE348121B|1970-12-07|1972-08-28|Alfa Laval Ab|
    DE2842967C2|1978-10-02|1984-08-16|Westfalia Separator Ag, 4740 Oelde|Continuously operating drum for concentrating suspended solids|
    US4300717A|1979-04-02|1981-11-17|Haemonetics Corporation|Rotary centrifuge seal|
    US4643709A|1985-05-01|1987-02-17|Alfa-Laval, Inc.|Method of operating nozzle centrifuges|SE459234B|1987-10-15|1989-06-19|Alfa Laval Marine Power Eng|SEAT AND EQUIPMENT MAKES INTERIOR DISCOVERY OF A Centrifuge Rotor|
    JPH03131360A|1989-10-14|1991-06-04|Kubota Corp|Centrifugal settling machine|
    DE4036793A1|1990-11-19|1992-05-21|Westfalia Separator Ag|SPIN DRUM FOR CONCENTRATING SUSPENDED SOLIDS|
    US5300014A|1992-10-16|1994-04-05|Dorr-Oliver Corporation|Underflow control for nozzle centrifuges|
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    DE20010743U1|2000-06-16|2000-10-12|Westfalia Separator Food Tec G|Centrifuge with double inlet|
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    SE530223C2|2006-05-15|2008-04-01|Alfa Laval Corp Ab|centrifugal|
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    CN105195338B|2015-10-21|2017-09-29|上海市离心机械研究所有限公司|Horizontal screw centrifuge type selecting tests the circulatory system|
    ES2812749T3|2016-02-22|2021-03-18|Alfa Laval Corp Ab|Centrifugal separator with intermittent discharge system|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8601154A|SE462077B|1986-03-12|1986-03-12|CENTRIFUGAL SEPARATOR WITH CLOSED APPLICATION OF HEAVY COMPONENT|
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