US3696927A - Hydrocyclone - Google Patents

Hydrocyclone Download PDF

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Publication number
US3696927A
US3696927A US9685A US3696927DA US3696927A US 3696927 A US3696927 A US 3696927A US 9685 A US9685 A US 9685A US 3696927D A US3696927D A US 3696927DA US 3696927 A US3696927 A US 3696927A
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US
United States
Prior art keywords
outlet
disc
discharge chamber
angle
central axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US9685A
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English (en)
Inventor
Karl Folke Olof Jakobsson
Bo Ake Forsner
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Celleco AB
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Celleco AB
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Filing date
Publication date
Application filed by Celleco AB filed Critical Celleco AB
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Publication of US3696927A publication Critical patent/US3696927A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • B04C5/16—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations with variable-size outlets from the underflow ducting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations

Definitions

  • ABSTRACT A discharge chamber of circular cross-section extends axially from the vortex chamber and has at one end an inlet from the vortex chamber and at the other end a bottom provided with an outlet, the discharge chamber also having a central axis around which the heavy fraction separated in the vortex chamber is rotated in one direction while passing from said inlet to said bottom, the outlet being located below the plane of the bottom.
  • the bottom has an open discharge groove communicating with the outlet and leading therefrom with a gradually diminishing crosssectional area in said one direction along the circular side wall of the discharge chamber through an angle less than one revolution; and a covering disc is disposed in close parallel relation to the bottom plane and is movable around the central axis, this disc having a recess in its peripheral portion and otherwise covering said bottom substantially entirely.
  • This invention relates to hydrocyclones for separating suspensions of solid particles, such as a pulp suspension, into light and heavy fractions. More particularly, the invention relates to such a cyclone wherein the separated heavy fraction is led away through an axially elongated discharge chamber of circular cross-section, the heavy fraction rotating around a central axis of the discharge chamber while moving from an inlet in one end of this chamber toward a bottom at the other end where the outlet for the heavy fraction is located.
  • the principal object of the present invention is to provide a hydrocyclone which avoids this problem.
  • the bottom of the discharge chamber has an open discharge groove communicating with the heavy fraction outlet which is located below the plane of the bottom.
  • This groove leads from the outlet with a gradually diminishing cross-sectional area in the direction in which the heavy fraction rotates about the central axis of the discharge chamber, the groove extending along the circular side wall of the discharge chamber through an angle less than 360.
  • a covering disc is disposed in close parallel relation to the bottom plane and is movable around the central axis, this disc having a recess in its peripheral portion and otherwise covering the bottom substantially entirely.
  • FIG. 1 is a side elevational view of one form of the new hydrocyclone
  • FIG. 2 is a plan view of the hydrocyclone shown in FIG. 1;
  • FIG. 3 is an enlarged vertical sectional view of the lower portion of the hydrocyclone, including the discharge chamber, this view being taken on line III- III in FIG. 4;
  • FIG. 4 is a sectional view on line IV-IV in FIG. 3;
  • FIGS. 5 and 6 are detailed plan views of the bottom of the discharge chamber and the covering disc, respectively, in FIG. 4;
  • FIGS. 7, 8 and 9 are similar views of the parts shown in FIGS. 5 and 6 in three different cooperating positions;
  • FIGS. 10 and l1 are views similar to FIGS. 5 and 6, respectively, but showing modifications
  • FIG. l2 is a similar view showing the parts in FIGS. l0 and 1l in a cooperating position;
  • FIGS. 13 and 14 are similar views of details according to FIGS. 5 and ll, showing the parts in two different cooperating positions, and
  • FIG. 15 is a view similar to FIG. l1 but showing a modification.
  • the hydrocyclone Acornprises housing means including an upper part 1 forming a conventional vortex chamber.
  • This chamber is providedat its upper end portion with a tangential inlet 2 for a suspension of solid particles, such as a pulp suspension, and with an outlet 3 for the separated light fraction.
  • the lower end lof the vortex chamber has an outlet 4 (FIG. 3) constituting the inlet to a discharge chamber 5 formed by the housing means and extending coaxially from the vortex chamber. Due to the tangential direction of the inlet 2, the suspension is rotated around the central axis 6 common to the vortex chamber and the discharge chamber in the direction of the arrow 7 (clockwise as viewed in FIG. 4).
  • the separated heavy fraction retains this direction of rotation in discharge chamber 5, although it is spread in all radial directions by a screen arranged in the discharge chamber in a conventional manner, the screen being indicated at 13 in FIG. 3 by dot-dash lines.
  • the discharge chamber 5 is circular in cross-section and is delined by a cylindrical casing 8 of the housing means.
  • the lower part of this casing contains a bottom portion 9 (see particularly FIGS. 4 and 5) which consists of a cylindrical body, the upper plane of this body forming the bottom of the discharge chamber.
  • the bottom portion 9 is provided with a counter-sink extending along a part of its periphery and which, in the direction of the arrow 7, gradually diminishes in breadth and depth below the bottom plane 10.
  • This counter-sink forms an open discharge groove l1 which is limited radially outward by the circular side wall of casing 8.
  • An outlet l2 for the heavy fraction is located in the side wall below the bottom plane l0, and the discharge groove 1l communicates with this outlet.
  • the discharge groove thus leads from the outlet l2 with a gradually diminishing cross-sectional area along the circular side wall of the discharge chamber in the same direction as that of the rotation of the heavy fraction around the central axis 6, the groove extending through an angle of less than one revolution as shown at T in FIG. 5.
  • a covering disc 14 In close parallel relation to the bottom of the discharge chamber 5 is a covering disc 14 (see particularly FIGS. 4 and 6).
  • This disc is mounted for rotation around the central axis 6 by means of a shaft l5 provided with a handle 16 (FIG. 3).
  • Shaft 15 is centrally guided in the bottom portion 9 and can be locked in a selected rotational position by means of a lock nut 17.
  • the disc 14 is of generally circular form, and its diameter is only so much smaller than the inner diameter of casing 8 that the disc can be turned freely.
  • a recess 18 is provided along a peripheral portion of the disc and is confined between two edges a and b, so that the disc recess extends along the side wall of the casing through an angle or extension indicated at S in FIG. 6.
  • the discharge groove 11 of varying cross-section extends along the same side wall through the angle or extension T, and the ungrooved part of the bottom 9 extends along this wall through an angle or extension R which is equal to S (FIG
  • the heavy fraction when the heavy fraction circulates in the discharge chamber in the direction of the arrow 7 and the disc 14 is in the position shown in FIGS. 3 and 4, the heavy fraction will flow around the edge a of the disc, as shown by arrow 19in FIG. 3, and will flow through the groove l1 in the direction of the arrow 20 (FIG. 4).
  • the smallest crosssectional area of the discharge groove 11 (the area which determines the discharge rate) is constituted by its cross-section at the edge a.
  • the discharge rate can be controlled by turning the disc about axis 6 so that the edge a is situated over different cross-sections of the discharge groove 1 1.
  • the disc 14 is there shown with its edge b situated directly above the largest cross-section of groove l l, this position being particularly suitable when a rapid emptying of the discharge chamber 5 is desired. In this position, the discharge chamber will open directly in front of the outlet l2, and the discharge groove 11 will not be used at all.
  • the flow of the heavy fraction around the edge a of the covering disc 14, as previously explained, is an important feature of the invention. It achieves a high degree of dynamic loss of pressure and contraction in the cross-section of the discharge groove 11 below this edge. lt is therefore possible to attain a large throttling e'ect also in a relatively large cross-section which increases considerably the ability to control the outlet flow within wide limits without any risk of blocking the outlet.
  • FIG. 12 shows the disc 14a over the bottom portion 9a in the same rotational position as in FIG. 7 and shows that the previously mentioned pocket is not created. In the positions shown in FIGS. 8 and 9, the covering and opening conditions will be essentially unchanged.
  • the discharge chamber can just as well be provided with a tangential inlet for the heavy fraction which will bring about the same conditions of flow and connect, for example, in the manner disclosed in Swedish Pat. No. 197,182a. ln such an arrangement it is not necessary that the hydrocyclone be of a vortex chamber type, the main requirement being only that the hydrocyclone deliver a heavy fraction to the tangential inlet.
  • a hydrocyclone for separating a suspension of solid particles into heavy and light fractions means forming an axially extended discharge chamber of circular cross-section having at one end an inlet for said heavy fraction and at the other end of a bottom provided with an outlet, the discharge chamber also having a central axis around which said heavy fraction is rotated in one direction while passing from said inlet to said bottom, said outlet being located below the plane ofsaid bottom, said bottom having an open discharge groove communicating at one end with said outlet and leading therefrom with a gradually diminishing crosssectional area in said one direction along the circular side wall of the discharge chamber through an angle less than one revolution, and a covering disc disposed in close parallel relation to said bottom plane and movable around said central axis, said disc having a recess in its peripheral portion and otherwise covering said bottom substantially entirely.
  • a hydrocyclone according to claim l in which said angle is no greater than the angle subtended along said side wall by an ungrooved portion of said bottom, said recess extending along the periphery of the disc through an angle the same as said angle through which v said groove leads.

Landscapes

  • Cyclones (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Centrifugal Separators (AREA)
US9685A 1969-02-13 1970-02-10 Hydrocyclone Expired - Lifetime US3696927A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1950/69A SE323651B (hr) 1969-02-13 1969-02-13

Publications (1)

Publication Number Publication Date
US3696927A true US3696927A (en) 1972-10-10

Family

ID=20259125

Family Applications (1)

Application Number Title Priority Date Filing Date
US9685A Expired - Lifetime US3696927A (en) 1969-02-13 1970-02-10 Hydrocyclone

Country Status (7)

Country Link
US (1) US3696927A (hr)
CA (1) CA929895A (hr)
DE (1) DE2003996A1 (hr)
FI (1) FI52288C (hr)
FR (1) FR2032884A5 (hr)
GB (1) GB1251946A (hr)
SE (1) SE323651B (hr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547228A1 (de) * 1974-11-01 1976-05-13 Edward L Rastatter Vorrichtung mit einem buendel wirbelzyklonen
US4392950A (en) * 1977-08-23 1983-07-12 The Bauer Bros. Co. Centrifugal type cleaner
US20100264088A1 (en) * 2009-04-20 2010-10-21 Sorbwater Technology As Apparatus and method for separation of phases in a multiphase flow
WO2013175201A3 (en) * 2012-05-21 2014-01-30 Adey Holdings (2008) Limited Separator device for heating system
US9149740B2 (en) 2010-12-01 2015-10-06 Adey Holdings (2008) Limited Water and dirt separator
US9463471B2 (en) 2010-12-01 2016-10-11 Adey Holdings (2008) Limited Water and dirt separator
USD793523S1 (en) 2014-03-13 2017-08-01 Adey Holdings (2008) Limited Filter assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT359439B (de) * 1979-03-01 1980-11-10 Bauer Roehren Pumpen Hydrozyklon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1701942A (en) * 1926-07-30 1929-02-12 Andrews Leonard Vortex classifier suitable for use in the classification of powdered materials by elutriation
US2927693A (en) * 1955-03-10 1960-03-08 Horace Freeman Cleaning of paper pulp suspensions
US3289894A (en) * 1962-10-22 1966-12-06 Stamicarbon Feeding device for cyclone separators
US3313413A (en) * 1964-08-31 1967-04-11 Ingersoll Rand Canada Apparatus for removing deleterious material from pulp stock

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1701942A (en) * 1926-07-30 1929-02-12 Andrews Leonard Vortex classifier suitable for use in the classification of powdered materials by elutriation
US2927693A (en) * 1955-03-10 1960-03-08 Horace Freeman Cleaning of paper pulp suspensions
US3289894A (en) * 1962-10-22 1966-12-06 Stamicarbon Feeding device for cyclone separators
US3313413A (en) * 1964-08-31 1967-04-11 Ingersoll Rand Canada Apparatus for removing deleterious material from pulp stock

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2547228A1 (de) * 1974-11-01 1976-05-13 Edward L Rastatter Vorrichtung mit einem buendel wirbelzyklonen
US4392950A (en) * 1977-08-23 1983-07-12 The Bauer Bros. Co. Centrifugal type cleaner
US20100264088A1 (en) * 2009-04-20 2010-10-21 Sorbwater Technology As Apparatus and method for separation of phases in a multiphase flow
US8950589B2 (en) * 2009-04-20 2015-02-10 Sorbwater Technology As Apparatus and method for separation of phases in a multiphase flow
US8951422B2 (en) 2009-04-20 2015-02-10 Sorbwater Technology As Apparatus and method for separation of phases in a multiphase flow
US9149740B2 (en) 2010-12-01 2015-10-06 Adey Holdings (2008) Limited Water and dirt separator
US9463471B2 (en) 2010-12-01 2016-10-11 Adey Holdings (2008) Limited Water and dirt separator
AU2013264997B2 (en) * 2012-05-21 2017-11-30 Adey Holdings (2008) Limited Separator device for heating system
RU2633574C2 (ru) * 2012-05-21 2017-10-13 Эди Холдингз (2008) Лимитед Сепарационное устройство
USD792942S1 (en) 2012-05-21 2017-07-25 Adey Holdings (2008) Limited Filter
KR102056487B1 (ko) * 2012-05-21 2020-01-23 아데이 홀딩스(2008) 리미티드 분리 장치
USD793522S1 (en) 2012-05-21 2017-08-01 Adey Holdings (2008) Limited Filter assembly
USD794165S1 (en) 2012-05-21 2017-08-08 Adey Holdings (2008) Limited Pipe fitment
USD796633S1 (en) 2012-05-21 2017-09-05 Adey Holdings (2008) Limited Fitment
KR20150040808A (ko) * 2012-05-21 2015-04-15 아데이 홀딩스 (2008) 리미티드 분리 장치
WO2013175201A3 (en) * 2012-05-21 2014-01-30 Adey Holdings (2008) Limited Separator device for heating system
USD812724S1 (en) 2012-05-21 2018-03-13 Adey Holdings (2008) Limited Release tool
USD813356S1 (en) 2012-05-21 2018-03-20 Adey Holdings (2008) Limited Release tool
USD823431S1 (en) 2012-05-21 2018-07-17 Adey Holdings (2008) Limited Filter
US10029264B2 (en) 2012-05-21 2018-07-24 Adey Holdings (2008) Limited Separator device
USD793523S1 (en) 2014-03-13 2017-08-01 Adey Holdings (2008) Limited Filter assembly

Also Published As

Publication number Publication date
FI52288B (hr) 1977-05-02
FI52288C (fi) 1977-08-10
GB1251946A (hr) 1971-11-03
FR2032884A5 (hr) 1970-11-27
SE323651B (hr) 1970-05-11
CA929895A (en) 1973-07-10
DE2003996A1 (de) 1970-11-19

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