GB1482113A - Method and apparatus for separating particles of different specific gravities carried in a liquid suspension - Google Patents

Method and apparatus for separating particles of different specific gravities carried in a liquid suspension

Info

Publication number
GB1482113A
GB1482113A GB3272674A GB3272674A GB1482113A GB 1482113 A GB1482113 A GB 1482113A GB 3272674 A GB3272674 A GB 3272674A GB 3272674 A GB3272674 A GB 3272674A GB 1482113 A GB1482113 A GB 1482113A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
outlet
chamber
suspension
tank
discharged
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
Application number
GB3272674A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boise Cascade Corp
Original Assignee
Boise Cascade Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C9/00Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08Vortex chamber constructions
    • B04C5/081Shapes or dimensions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04CAPPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24Multiple arrangement thereof
    • B04C5/30Recirculation constructions in or with cyclones which accomplish a partial recirculation of the medium, e.g. by means of conduits
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/18Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force

Abstract

1482113 Hydrocyclones BOISE CASCADE CORP 24 July 1974 [24 July 1973] 32726/74 Heading B2P A hydrocyclone for separating particles of different specific gravities carried in a liquid suspension, comprises a vertically-arranged housing 2 enclosing a separation chamber 4, an inlet 6 for introducing the suspension tangentially into the upper end of the chamber, a first outlet 12c communicating with the lower end of the chamber for discharging heavier particles which, in operation, pass down the chamber in an outer helical path adjacent the side wall of the chamber, upwardly convergent conical diverter means 12 centrally mounted in the bottom of the chamber for establishing in the central portion thereof, inside the outer helical path, an upwardly directed helical vortex flow of lighter particles, and a second outlet 18 communicating with the central portion of the upper end of the chamber for removing lighter particles therefrom. The outlet 12c is formed as a tangential slot which opens into a chamber 12d defined by a tubular bottom portion 12a of the diverter means 12. The chamber 12d communicates with a discharge conduit 14 provided with a throttle valve 16 for regulating the back pressure in the chambers 12d and 4. In a modification, the housing has a lower frusto-conical portion, the outlet for the lighter particles is cylindrical and the diverter has a curved peripheral wall. In a waste paper cleaning plant shown in Fig. 5, reclaimed waste paper suspension, which includes cellulose pulp fibres and heavy and light impurities having specific gravities respectively higher and lower than that of the fibres, is pumped from a supply tank 150 at a pressure of 30-50 p.s.i.g. through a tangential inlet 226 at the upper end of a first hydrocyclone 224. A suspension containing the heavy impurities and some reclaimable pulp fibres are discharged via a lower outlet 228 into a tank 154. A suspension containing the bulk of the fibres and the light impurities are discharged at a pressure of 5 p.s.i.g. via an upper outlet into a chamber 234 from which it is fed via a conduit 238 tangentially into the upper end of a second hydrocyclone 222 having diverter means 312. The acceptable cellulose fibres are discharged through a lower outlet 308 and a suspension containing the light impurities and some cellulose fibres are discharged via an upper outlet 320 into a tank 170 from which it is pumped into a third hydrocyclone 402. The light impurities are discharged as final light rejects via an outlet 410 and a suspension of cellulose fibres is discharged through an outlet 408 and returned to the tank 150. From the tank 154 the suspension is pumped into a fourth hydrocyclone 160 of the two-chamber type for separation into final heavy rejects discharged through outlet 162 and a suspension containing the cellulose pulp fibres and some heavy impurities which is returned to the tank 150 via an outlet 164 and/or to the tank 154 via an outlet 166. In a modification, the member 318 at the top of hydrocyclone 222 may be provided with an upper axial outlet for air and with a side outlet for the suspension of light impurities and cellulose fibres.
GB3272674A 1973-07-24 1974-07-24 Method and apparatus for separating particles of different specific gravities carried in a liquid suspension Expired GB1482113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3928186A US3928186A (en) 1973-07-24 1973-07-24 Combined pulp cleaning system including high and low pressure drop hydrocyclone cleaners

Publications (1)

Publication Number Publication Date
GB1482113A true true GB1482113A (en) 1977-08-03

Family

ID=23507406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3272674A Expired GB1482113A (en) 1973-07-24 1974-07-24 Method and apparatus for separating particles of different specific gravities carried in a liquid suspension

Country Status (7)

Country Link
US (1) US3928186A (en)
JP (1) JPS5431230B2 (en)
CA (1) CA1021723A (en)
DE (1) DE2435416B2 (en)
FI (1) FI223974A (en)
FR (1) FR2238534B1 (en)
GB (1) GB1482113A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2514162B2 (en) * 1975-03-29 1977-02-03 Plant for the treatment of waste paper
US4351804A (en) * 1978-11-06 1982-09-28 Research-Cottrell, Inc. Sulfur dioxide scrubber with hydroclone separator
DE3043729C2 (en) * 1979-12-12 1988-11-10 Papcel Celulosy Np
GB2070466A (en) * 1980-02-25 1981-09-09 Celleco Ab Separator for the separation of a mixture of a cellulose pulp suspension and coarse heavy particles
FR2478489B1 (en) * 1980-03-21 1985-08-30 Centre Tech Ind Papier Method and device for separation of particles in a fluid, in particular for the purification of papermaking suspensions
US4305825A (en) * 1980-08-20 1981-12-15 Laval Claude C Reaction member for a fluid separating device
US4617114A (en) * 1984-03-07 1986-10-14 Skardal Karl A Vortex cleaner for cleaning and deaerating paper pulp suspensions
DE3543205C2 (en) * 1985-12-06 1990-06-21 J.M. Voith Gmbh, 7920 Heidenheim, De
GB8604462D0 (en) * 1986-02-22 1986-03-26 Elp Products Ltd Hydrocyclone
DK161871C (en) * 1986-10-13 1992-02-17 Asea Stal Ab cyclone
WO2003099447A1 (en) * 2002-05-27 2003-12-04 Gl & V Sweden Ab Hydrocyclone
US7404492B2 (en) * 2005-04-29 2008-07-29 Glv Finance Hungary Kft Separation of fibre pulp suspensions containing relatively heavy contaminants
CA2759313C (en) * 2009-04-20 2016-03-15 Sorbwater Technology As Apparatus and method for separation of phases in a multiphase flow
EP2448680A4 (en) * 2009-07-03 2018-01-17 Ovivo Luxembourg S.à.r.l. Hydrocyclone, system and method for cleaning cellulose suspensions
CN102641791B (en) * 2011-12-05 2014-05-14 中国石油大学(北京) High-concentration liquid-solid hydrocyclone

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735547A (en) * 1956-02-21 vissac
BE500693A (en) * 1939-11-21
NL181479C (en) * 1952-09-24
US2799208A (en) * 1955-04-29 1957-07-16 Scott Harold Eric Baliol Vortex type separators
US2843265A (en) * 1956-07-17 1958-07-15 Rakowsky Victor Method of density separation
US3052361A (en) * 1960-12-06 1962-09-04 Marvin E Whatley Liquid cyclone contactor
DE1461195A1 (en) * 1963-08-02 1969-02-06 Rudolf Zemanek System for screening pulp suspensions
GB1058914A (en) * 1965-06-14 1967-02-15 Outokumpu Oy Froth flotation apparatus
US3696934A (en) * 1967-09-02 1972-10-10 Saburo Oisi Apparatus for centrifugally separating impurities from fluid suspensions
US3543932A (en) * 1967-12-29 1970-12-01 Nichols Eng & Res Corp Vortex chamber reject control
US3486619A (en) * 1968-01-24 1969-12-30 Wikdahl Nils Anders Lennart Method of removing impurities from a fiber suspension
DE1922610B2 (en) * 1969-05-03 1973-01-04 Aktiengesellschaft Des Altenbergs Fuer Bergbau Und Zinkhuettenbetrieb, 5060 Bensberg-Untereschbach
NL6909273A (en) * 1969-06-18 1970-12-22
US3764005A (en) * 1971-02-22 1973-10-09 Boise Cascade Corp Hydrocyclone pulp cleaner

Also Published As

Publication number Publication date Type
JPS5431230B2 (en) 1979-10-05 grant
JP999418C (en) grant
CA1021723A (en) 1977-11-29 grant
FR2238534A1 (en) 1975-02-21 application
DE2435416A1 (en) 1975-02-27 application
JPS5070962A (en) 1975-06-12 application
DE2435416B2 (en) 1977-04-07 application
CA1021723A1 (en) grant
FR2238534B1 (en) 1978-03-24 grant
US3928186A (en) 1975-12-23 grant
FI223974A (en) 1975-01-25 application

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee