US3862041A - Liquid suspension purifying unit - Google Patents

Liquid suspension purifying unit Download PDF

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Publication number
US3862041A
US3862041A US340185A US34018573A US3862041A US 3862041 A US3862041 A US 3862041A US 340185 A US340185 A US 340185A US 34018573 A US34018573 A US 34018573A US 3862041 A US3862041 A US 3862041A
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chamber
reject
outlet
cyclone
hydrocyclone
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US340185A
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English (en)
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Klas Robert William Robinson
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Individual
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Priority claimed from SE03428/72A external-priority patent/SE351993B/xx
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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
    • B04C5/24—Multiple arrangement thereof
    • B04C5/28—Multiple arrangement thereof for parallel flow
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C13/00—Details; Accessories
    • A45C13/34—Stays or supports for holding lids or covers open
    • 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
    • B04C5/18—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations with auxiliary fluid assisting discharge
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force

Definitions

  • One or more hydrocyclones are arranged in a common housing to form a liquid purifying unit.
  • Each hydrocyclone has a casing having an inject inlet, for the suspension to be cleaned, an accept outlet and a reject outlet.
  • the common housing is divided up so as to have an inject chamber, an accept chamber and a reject chamber.
  • Each hydrocyclone is arranged so that each accept outlet is located at the bottom of the unit and each reject outlet is located at the top thereof, with reject outlet open above the surface of the liquid in said reject chamber.
  • the reject chamber forms part of a closed circuit with the reject outlet connected to an outlet line in a manner to maintain a generally constant level of liquid in the reject chamber.
  • the present invention relates to arrangements for purifying liquid suspensions and more particularly to a battery or unit of so-called hydrocyclones for freeing liquids of impurities.
  • the invention especially pertains to the provision of apparatus for purifying fibre suspensions and to the provision of such apparatus suitable for use in paper making factories, for example.
  • hydrocyclones In the paper and pulp industry, it is normal practice to use hydrocyclones to remove coarse and fine impurities and dirt particles from aqueous fibre pulp suspensions. Because of the very large through flow of fibre suspension in a conventional pulp or paper making factory, a very large number of hydrocyclones are required to obtain the desired degree of purification, the cyclones being coupled together in parallel to form large units or batteries.
  • a number of hydrocyclones are placed adjacent each to form a hydrocyclone battery, the cyclones extending vertically with their outlet nozzles or ports directed downwardly and with common inlet, outlet and waste chambers, e.g., a hydrocyclone battery such as that illustrated in Swedish Pat. No. 314,959, FIG. 8.
  • the cyclones With another arrangement, the cyclones are placed in horizontal layers, one on top of the other, the cyclones in each layer belt arranged radially with their nozzles pointing inwards.
  • cept and reject respectively are passed to and from the units through a closed conduit system.
  • the other requirement is that it should be possible to see the cyclones, primarily their reject outflow nozzles, since disturbances in the operation of a particular cyclone, e.g., as a result of blockages, can be readily observed at the nozzles.
  • the object of the invention is to obviate the above two disadvantages and to solve the problem of providing for a visually checkable reject outflow and of enabling the cyclones to be connected to a closed system while fulfilling the obvious requirement of a compact space saving construction.
  • the problem is solved in accordance with the invention by the surprising and radical step of arranging the separate hydrocyclones forming part of a purifying unit upside down in an upright position, i.e., with the nozzles upwards, while the reject chambers, which are thus uppermost in the unit, are arranged fully closed with their outlets connected to a closed conduit system.
  • the fact is considered that when purifying fibre suspensions by means of hydrocyclones there is always a tendency for the nozzles to block owing to a thickening of the suspension, i.e., an increase in its concentration which creates the mentioned requirement of convenient, visual superintendence of the nozzle tips and this tendency is particularly manifest when purifying, e.g., paper pulp consisting of long or coarse fibres, although other factors may also occur which tend to increase the extent to which blockages occur.
  • the cyclones of the units are provided with inflow openings for diluent liquid which is supplied from a source in a manner disclosed in greater detail in the following.
  • the fact that the cyclones are inverted seems to contribute to a very efficient dilution elutriation with a minimum risk of the reject openings of the cyclones becoming blocked.
  • FIG. 1 is a vertical section through a cyclone unit according to the invention, the section being taken through the line II in FIG. 2.
  • FIG. 2 is a side view of one end of the unit provided with pipe connections.
  • FIG. 3 is a vertical section through the upper end of an individual cyclone shell with associated elements
  • FIG. 4 is a corresponding section through the lower end of the shell and shows means co-acting with said end.
  • FIG. 5 is a diagrammatic view in perspective of a portion of a purifying plant comprising hydrocyclone units according to the invention and shows two units connected with the place for a third free before the connection.
  • FIG. 6 is a detail view of a connection portion between the units and the fixed conduit system.
  • FIG. 7 is a vertical section view through a portion of a cyclone unit similar to that shown in FIG. 1 but moditied according to a further aspect of the invention, the section being taken through the line VII-VII in FIG. 8.
  • FIG. 8 is a side view of one end of the modified unit with pipe connections.
  • FIG. 9 is a detail sectional view and illustrates a clamping device for the cyclones of the unit.
  • FIG. 10 is a vertical sectional view through a portion of a cyclone unit according to the invention and provided with an eleutriation chamber, the section being taken through line X-X in FIG. 11.
  • FIG. 11 is a side view of one of the units with pipe connections.
  • FIG. 12 is a vertical detail sectional view through the upper portion of one of the cyclones forming part of the unit and illustrates the construction of the elements which attend to the dilution of the reject.
  • FIG. 13 is a cross-sectional view taken through the line XIIIXIII in FIG. 12.
  • FIGS. and 2 show the connecting portion of a purifying unit according to the invention comprising a number of hydrocyclones.
  • the unit comprises a housing 10 made of stainless steel sheet and divided into three chambers, of which the middle chamber 12 is the inlet chamber having an inlet 14 for the liquid suspension to be purified, i.e. the inject.
  • the purified suspension i.e., the accept
  • the slurry containing the separated material i.e., the reject
  • the three chambers are separated by partitions 24 and 26,
  • the inject chamber 12 may be reinforced on the outside thereof with a reinforcing rib 25.
  • the reject chamber is covered with a transparent cover 28, e.g., made of plexiglass.
  • Each cyclone comprises in a known manner a slightly conical housing 32 of stainless steel.
  • the casing At its widest or inlet end the casing is provided with a cover element 34, which, as illustrated, is provided with a substantially conically shaped portion which projects into the mouth of the casing.
  • the cover element has a central, through passing channel 36 which forms the so called accept tube through which the purified suspension flows and which opens out into the accept chamber 16 at 35.
  • the cover element 34 has a boss 38 which extends down through an opening in the partition wall 24 between the inlet or inject chamber 12 and the accept chamber 16 (see FIG.
  • an inlet is arranged tangentially to the cyclone casing in a simple manner, by clipping a flap 44 in the casing metal from the edge of the casing and folding the flap out to form an inlet opening 45.
  • the narrowest portion of the cyclone casing 32 extends through an opening in the upper wall 26 between the reject chamber 20 and the inject chamber 12.
  • An externally threaded sleeve 46 is welded to the upper side of the wall 26 around the opening and the dimensions of the elements are so adapted that the end of the cyclone casing projects slightly above the sleeve.
  • a plastics outlet cone 50 is provided at its lower end with a hexagonal portion 48 or a similar portion which enables a spanner to be applied thereto and has an internal thread meshing with the external thread on the sleeve 46.
  • the outlet cone 50 is screwed onto the sleeve 46 and engages the upper end of the cyclone casing 32 over an inserted packing ring 52, the remainder of the cone being of such internal configuration as to form a continuation of the casing 32.
  • the outlet cone 50 is tightened, by applying a spanner to the hexagonal or nut portion 48, the nozzle casing 32 as a whole is forced downwards, which means that the cover element 34 is constantly urged against the lower partition wall 24.
  • the upper end of the outlet cone 50 is terminated with a so called reject nozzle 54 which extends from the outlet nozzle 55 and which by means of a suitable screw joint 53 is joined to the upper end of the outlet cone.
  • the liquid suspension to be cleaned e.g., a suspension of cellulose fibres
  • the liquid suspension to be cleaned enters through the inlet 14 into the inject chamber 12, from where it flows in through the inlet openings 45 of the cyclone casing and is caused to rotate rapidly to separate undesired matter therefrom in a desired manner.
  • the purified suspension, the accept is collected towards the centre of the cyclones and departs down through the accept tube 36 in the cover element 34 to the accept chamber 16 and out through the outlet 18.
  • the separated particles are collected against the inner surfaces of the cyclone and accompany the reject flow out through the outlet nozzles 55 of the cyclones.
  • the exiting reject forms a parasol-like liquid curtain around the nozzle, it being possible to observe the discharge sequence through the transparent cover 28 of the unit.
  • This latter possibility affords, as mentioned above, a useful advantage, since a fault in a cyclone, e.g., a blockage, is immediately reflected in the appearance of the parasol and can be seen. Removal of the plexiglass cover 28 affords easy access to the cones 50 and the nozzles 54 for exchange and cleaning purposes.
  • the reject is collected in the reject chamber 20 and departs through the reject outlet 22.
  • the chamber 20 it is possible to make the chamber 20 fully closed and to connect it to a closed conduit system but nevertheless be able to see the reject flowing out into the ambient air. In this way the risk of reject being drawn back into the cyclones is eliminated, this risk being prominent when the reject outlet nozzles lie under the surface of a liquid.
  • the level of liquid in the reject chamber 20 can be readily held around the position shown by the line X-X by connecting the outlet 22 to a weir device or water trap, so that with normal operation the liquid in the reject chamber 20 takes a substantially constant level and a closed air space is defined at the top of the chamber in which the reject freely flows out to be collected in the lower portion of the chamber.
  • FIG. 5 illustrates diagrammatically how the cyclone unit according to the invention can be connected in practice, e.g., for purifying fibre stock in a paper making factory.
  • Each battery forms a unit which can be erected as a simple frame or base 56 for connection to central collecting lines, which extend in connection to the frame, namely an accept line 60, an inject line 62 for stock to be purified and a reject line 64.
  • the connecting stubs 18, 14, and 22 of the battery are connected to corresponding stubs 18', 14' and 22 on the pipe lines by means of a detachable pipe coupling 66, see FIG. 6, for example, of the type described in the British Pat. No. 1,288,680.
  • Suitable shut-off valves 68 are preferably mounted on one or both sides of the pipe coupling 66, to enable a battery to be rapidly shut off and disconnected without disturbing the remainder of the system.
  • the batteries can be moved by means of a fork-lift truck or may be mounted on wheels.
  • the reject chamber is suitably connected over a pipe bend 70, whereby a water trap is produced in a simple manner for controlling the liquid level in the reject chamber 20, FIG. 1.
  • FIG. 5 presents a clear picture of the practical advantages afforded by the purifying unit of the present invention.
  • Each battery which can thus comprise a large number of separate hydrocyclones, forms a readily moved and easily connected extremely compact unit, and in contradistinction to all previously known cyclone systems the operation of the unit can be conveniently superintended visually through the transparent cover 28 of the battery, since any disturbance in the functioning of an individual cyclone is immediately reflected in the appearance of the reject parasol appearing at the cyclone nozzles.
  • each battery can be readily and rapidly disconnected from the system for securing purposes without interrupting the operation.
  • the proposed erection illustrated in FIG. 5 is given only by way ofexample and the orientation of the units when moved to and from their correct positions can be effected in many other simple ways.
  • the height of the inlet or inject chamber 12 is somewhat greater than that of the reject chamber 20, and the outlet or accept chamber 16 has a height of the order of half the height of the reject chamber, as seen in FIG. 1.
  • a pressure above atmospheric prevails which may amount in certain cases to about (40 psig), and then it may be advisable to reduce the dimensions of the inject chamber, primarily its height, which in turn reduces the requirement of stiffening and bracing of the casing of the unit.
  • Such an adjustment of the relative size of the chamber may be readily carried out within the scope of the invention, and in FIGS. 7-9 an example is shown of such an embodiment of the cyclone unit according to the invention. The same or similar details reappearing from the unit described in the aforegoing have obtained the same reference characters with the addition of a.
  • the unit comprises a housing 10a divided into an upper reject chamber 20a having a transparent cover 28a and an outlet 22a, an intermediate inject chamber with an inlet 14a and, at the bottom, an outlet chamber or accept chamber 16a with an outlet 18a.
  • the chambers are separated by partition walls 24a and 26a but, as may be seen, the wall 26a between the reject chamber 20a and the inject chamber 12a is disposed on a considerably lower level than before, so that the inlet chamber 12a will become very compact and exhibit a low height, for which reason the outer walls in particular of this chamber are exposed to less stress and strain with a lower risk of buckling under the action of the inject pressure.
  • the individual cyclones 300 are provided as before with cover elements 34a at their inlet ends and are adapted to engage in openings in the partition wall 240 between the inject and accept chambers 12 a and 16a, respectively, as described before with reference to FIG. 4. However, in this case the cyclones are applied against the wall 24a by means of a clamping device of a somewhat different design, which has been introduced into the partition wall 26a between the reject and inject chambers 20a and 12a, respectively, and which is shown in greater detail in FIG. 9.
  • the individual conical cyclone casings or shells 32a pass through clearance openings in the partition wall 26a, which openings are formed by internally threaded bushings or sleeves 47 which are welded to the wall 26a.
  • Heavy nuts 49 preferably of a suitable plastics material, such as nylon, are provided with external threads fitting the internal threads 0d the sleeves 47, said nuts exhibiting an internal conical surface fitting the external conical peripheral surface of the throughpassing cyclone on the very level where the cyclone passes through the partition wall 26a.
  • the nut 49 engages the conical peripheral surface of the cyclone and pulls with it, when screwed into the sleeve 47, the cyclone downwards, and hereby the lower end of the cyclone is urged also in this case into engagement with the lower wall 24a.
  • each cyclone is provided as before with an outlet cone 50a having at its lower end an internally threaded hexagonal or spanner portion 48a which, however, in this case is screwed directly onto the top end of the cyclone casing 32a.
  • this screw joint is not utilized for mounting the cyclones in the housing of the unit.
  • the cyclone units illustrated in FIGS. 79 exhibit a comparatively voluminous reject chamber which, however, in no way exercises any detrimental effect on the function and operation of the unit.
  • an even greater freedom may be gained for adjusting the liquid level X'-X in the reject chamber 20a by a suitable location of the reject outlet 22a and the connected weir outflow, water trap or the like.
  • the lower portion of the reject chamber may be utilized to advantage as a so called scrap trap, that is, heavier particles passing through the reject outlet are collected on the bottom of the chamber, and through a door in the chamber wall they may be removed and cleaned out periodically.
  • FIGS. 10-13 a cyclone unit according to the invention is shown which is provided with the dilution of elutriation chamber mentioned in the introduction.
  • the unit whose reappearing details have the same numeral designation as before, but this time with the suffix b comprises also in this case a housing or casing 10b made of stainless steel and divided into three main chambers, namely an intermediate chamber 12b having an inlet 14b for the liquid suspension to be purified, i.e., the inject, a bottom chamber 16b having an outlet 18b and, at the top, a reject chamber 20b having an outlet 22b.
  • a dilution or elutriation chamber 110 having an inlet 112 for the diluent, which in the case of pulp suspensions comprises fresh water.
  • the inlet chamber 12b is separated from the accept chamber 16b by a partition wall 24b and from the elutriation chamber by a partition wall 26b.
  • the elutriation chamber is separated from the reject chamber by a partition wall 114.
  • a number, e.g., 20, of vertical cyclones 30b Arranged in the unit housing 20b is a number, e.g., 20, of vertical cyclones 30b, which as before are placed with their outlet nozzles or tips facing upwards and thus discharging into the reject chamber 20b arranged in the upper portion of the unit and covere with a transparent cover 28b.
  • Each cyclone comprises in a known way a slightly conical casing 32b of stainless steel sheet, which at its downwardly facing widest end or inlet end is provided with a cover element 34b which in the manner disclosed is urged against the partition wall 24b.
  • the narrowest portion of the cyclone casing 32b projects up through an opening in the upper partition wall 26b between the inject chamber 12b and the elutriation chamber 110, see FIG. 12.
  • An externally threaded sleeve 46b is welded on the upperside of the partition wall 26b around the opening and a plastics outflow cone 80 is provided at its lower end with a hexagonal portion 78 or similar spanner engaging means, said portion having an internal thread meshing with the external thread of the sleeve 46b.
  • the outflow cone 80 is screwed onto the sleeve 46b and engages the upper end of the cyclone casing 32b, the remainder of the case having such internal configuration as to form a continuation upwards on the interior of the cyclone casing 32b.
  • the hexagonal or nut portion 78 of the outflow cone 80 is tightened, the cone casing 32b is urged downwards in its entirety, see FIGS. 1 and 3, whereby the cover element 34b is caused to bear against the partition wall 24b in the same way as in the previous embodiments.
  • the outflow cone is divided into an upper portion 84 having an outlet opening or reject outlet 85 (see FIG. 10) and a lower portion 86 which is generally cylindrical and which is terminated at the bottom with the aforementioned spanner engaging portion 78.
  • a shoulder 88 Between the upper and lower portions 84 and 86 of the cone 80 there is formed a shoulder 88.
  • the height position see FIG. 12, is so adjusted that when the outflow cone 80 is screwed into position the shoulder is located approximately level with the partition wall 114 between the elutriation chamber and the reject chamber 20b. Disposed in this wall are openings 116 for the different outflow cones, wherewith the edges of the openings can be raised slightly, as shown in FIG.
  • a number of spacing posts 120 are suitably arranged centrally in the long direction of the housing and welded to the partition wall 26b. The free ends of the posts are reduced in diameter and threaded to form a shoulder 122 whose height above the partition wall 26b corresponds to the position of attachment flanges 124 welded to the outer wallof the housing, the flanges 124 together with the shoulders 122 on the spacing posts supporting and aligning the partition wall 114 in its correct position, whereafter the wall 114 is fixed in a conventional manner by means of screws 126 passing into the flanges 124 and nuts 128 screwed onto the free ends of the spacing posts 120.
  • This construction is given only by way of example, however, and it is thought that one skilled in the art can suggest many other ways of embodying an elutriation chamber into the purifying unit.
  • Diluting liquid in the present case clean water
  • the tangential inlet 132 suitably comprises a circular channel formed in a bead or bulge 134 on the outflow cone, as shown in the Figures.
  • the diameter of the inlet 132 is adapted to the magnitude of the inflow envisaged,
  • the pressures (above atmospheric) prevailing in the reject chamber 20b the elutriation chamber 110, the inject chamber 12b and the accept chamber 16b being designated p p p,-, and p, respectively, are considered, it will readily be perceived that the through flow with subsequent purifying effect obtained in the unit as a result of the rotary movement of the liquid in the cyclones will be dependent on the pressures prevailing in the different chambers in relation to the dimensions of the different inlet openings.
  • certain chamber pressures are fixed and determined by the external conditions, for instance, the pressure above atmospheric p, in the reject chamber 20b is, according to the principle of the unit, around 0, while the pressure p in the accept chamber is also around 0 or slightly above, up to 7.5 psig.
  • this pressure is around 35 psig. If the diluting liquid is now supplied to the elutriation chamber 110 under a suitably adjusted pressure above atmospheric, say around psig, a certain amount of liquid is forced in through the tangential inlet 132 in the outflow cone 80 and mixes with reject flowing out through the cone outlet 85, whereupon the aforementioned diluting action is obtained with reduced risk of blockages occurring in the outlet. From case to case a suitable continuity state with optimal conditions can be created in different respects by a readily effected control of the flow of the diluent liquid into the elutriation chamber 110 and therewith the pressure p above atmospheric prevailing in the chamber.
  • a series of purifying units according to this embodiment of the invention may be connected up, for example, for cleansing fibre suspensions in a paper making factory in the simple manner described in the aforegoing, only one extra connection to the fresh water supply being required for the elutriation chambers of the different units, and in other respects the installation may be carried out substantially as illustrated in FIG. 5.
  • the elutriation may be suitably brought about by means of specific connections, for instance of the hose type, to each cyclone, as indicated by broken lines in FIG. 7.
  • the spanner portions 48a of the outlet cones are then extended on their top sides by raised portions 86 provided with connections for inlet tubes or hoses 132 for diluent liquid which is introduced tantentially into the lower parts of the outlet cones, approximately in the same way as disclosed with reference to FIGS. 12 and 13, which liquid thus mixes with the reject before this exits through the reject opening 85'.
  • the hoses or pipes may be connected to the outlet cones by means of so called banjo coupling enclasping the cones or similar dis'connectible coupling means known per se.
  • a liquid purifying unit comprising at least one hydrocyclone having a casing enclosing a conically taper- -ing cyclone chamber in whose widest portion or base the inject or the suspension to be purified is passed through an inlet, and two outlets arranged coaxially with the chamber, namely a reject outlet and an accept outlet at the point and base respectively of the cyclone chamber, the hydrocyclone being mounted in an outer housing which by means of upper and lower partition walls is divided into at least three chambers, namely an inject chamber in which the inlet of the hydrocyclone is located, an accept chamber into which the accept outlet of the hydrocyclone discharges, and a reject chamber into which the reject outlet of the hydrocyclone discharges, the hydrocyclone being arranged generally vertically with the accept outlet at the bottom and the reject outlet at the top and discharging into the reject chamber above the liquid level therein so that the reject may flow freely out into air, the widest portion of the casing being joined with a cover element defining therein the accept outlet while the inlet
  • a unit according to claim 1 wherein the retaining member comprises a threaded portion provided at the connection end of the outflow element, said portion engaging the said pipe stub as well as the upper narrower end of the cyclone casing.
  • a unit according to claim 1, wherein the retaining member comprises a nut element, preferably of plastics, engaging the said pipe stub as well as the conical external surface of the cyclone casing.
  • a liquid purifying unit comprising at least one hydrocyclone having a casing defining a conically tapering cyclone chamber in whose widest portion or base the inject or the suspension to be purified is passed through an inlet and two outlets arranged coaxially with the chamber, namely a reject outlet and an accept outlet at the point and base respectively of the cyclone chamber, the hydrocyclone being arranged generally vertically with the accept outlet at the bottom and the reject outlet at the top, the hydrocyclone being mounted in an outer housing which by means of upper and lower partition walls is divided into at least three chambers, namely an inject chamber in which the inlet of the hydrocyclone is located, an accept chamber into which the accept outlet of the hydrocyclone discharges, and a reject chamber into which the reject outlet of the hydrocyclone discharges, the reject chamber as defined by the outer housing and the upper partition wall being substantially closed, the casing projecting upwardly into the reject chamber so that the reject outlet is spaced upwardly a substantial distance above the upper partition wall, and means for maintaining the liquid reject in the lower
  • a unit according to claim 4, wherein said means for maintaining the liquid level in the reject chamber below the elevation of the reject outlet includes a weir, water trap, or like device for maintaining a substantially constant liquid level in the reject chamber.
  • the source of diluent liquid comprises a supply conduit connected to the said inflow opening in the upper portion of the cyclone by means of a disconnectible connection means, e.g., a banjo coupling.
  • the source of diluent liquid comprises a dilution chamber, a so called elutriation chamber, which is positioned between the inlet chamber and the reject chamber so that the upper tapering portion of the hydrocyclone passes through the elutriation chamber where said portion is provided with said inflow opening, said liquid thus being arranged to enter the outflow portion of the cyclone through said opening.
  • a unit according to claim 9 characterized in that said inflow opening disposed in the upper portion of the hydrocyclone is arranged tangentially relative to the axis of the cyclone.
  • a partition wall forming the ceiling of the elutriation chamber has the form of a plate arranged to be fixed to attachment means on the housing, the plate being provided with an opening for receiving said outflow element, the edge of said opening being folded or bent up to form a seat for a packing ring or like sealing means arranged to sealingly engage a shoulder of the outflow element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cyclones (AREA)
  • Paper (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detergent Compositions (AREA)
US340185A 1972-03-16 1973-03-12 Liquid suspension purifying unit Expired - Lifetime US3862041A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE03428/72A SE351993B (fi) 1972-03-16 1972-03-16
SE11078/72A SE361268B (fi) 1972-03-16 1972-08-25

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US3862041A true US3862041A (en) 1975-01-21

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US (1) US3862041A (fi)
JP (1) JPS5418422B2 (fi)
AT (1) AT326474B (fi)
AU (1) AU468387B2 (fi)
CA (1) CA1010375A (fi)
DE (1) DE2312618C2 (fi)
ES (1) ES412698A1 (fi)
FI (1) FI52431C (fi)
FR (1) FR2336981A1 (fi)
GB (1) GB1381239A (fi)
IT (1) IT982074B (fi)
NO (1) NO140705C (fi)
SE (1) SE361268B (fi)

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US3940331A (en) * 1974-11-01 1976-02-24 Rastatter Edward L Vortical cyclone cluster apparatus
US4146469A (en) * 1977-10-11 1979-03-27 Clark & Vicario Corporation Mounting of cleaners in papermaking system
US4197193A (en) * 1975-10-21 1980-04-08 J. M. Voith Gmbh Apparatus for classifying the constituents of dilute suspensions of fibers
US4392950A (en) * 1977-08-23 1983-07-12 The Bauer Bros. Co. Centrifugal type cleaner
DE3216105A1 (de) * 1980-09-08 1983-11-03 The Dow Chemical Co., 48640 Midland, Mich. Schlammkonzentrator und seine verwendung
EP0096562A2 (en) * 1982-06-04 1983-12-21 The Black Clawson Company Reverse centrifugal cleaning of paper making stock
US4956090A (en) * 1988-04-29 1990-09-11 Richard Berg Aktiebolag Hydrocyclone divided into sections
WO1997018168A1 (en) * 1995-11-13 1997-05-22 Ab Ribea Engineering Device for adding oxygen to water
US20040068827A1 (en) * 2001-02-24 2004-04-15 James Dyson Vacuum cleaner
US20040206678A1 (en) * 2001-11-27 2004-10-21 Kazuaki Takahashi Filter device
US20150034543A1 (en) * 2009-05-08 2015-02-05 Bengt Eriksson Assembly with multiple hydrocyclones, method for assembling multiple hydrocyclones and support structure for multiple hydrocyclones

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
CA992008A (en) * 1972-04-28 1976-06-29 Charles E. Mcchesney Blown thermoplastic bottle and method for making same
JPS5411420Y2 (fi) * 1974-12-02 1979-05-23
SE412169B (sv) * 1977-03-09 1980-02-25 Alfa Laval Ab Multipelcyklonseparator
US4155839A (en) * 1977-11-28 1979-05-22 The Black Clawson Company Reverse centrifugal cleaning of paper making stock
JPS5516821U (fi) * 1978-07-17 1980-02-02
US4462899A (en) * 1982-12-20 1984-07-31 The Bauer Bros. Co. Hydrocyclone cleaner assembly
JPS59169554A (ja) * 1983-03-17 1984-09-25 Oishi Eng:Kk 液体サイクロン装置
AU3034884A (en) * 1983-07-14 1985-01-17 Black Clawson Company, The Reverse centrifugal cleaning of stock
HUT37075A (en) * 1983-08-11 1985-11-28 Noel Caroll Liquid separator
FR2615760B1 (fr) * 1987-06-01 1990-10-26 Inst Filtration Tech Separat Microcyclone et ensemble modulaire de tels microcyclones en batterie
FI123094B (fi) * 2010-03-18 2012-11-15 Andritz Oy Laitteisto ja menetelmä haitallisen materiaalin erottamiseksi massan valmistusprosessissa

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US2709397A (en) * 1950-07-19 1955-05-31 Dorries A G Vorm Maschinenfabr Tubular hydro-extractor for purifying suspensions of fibrous material
US2717536A (en) * 1952-12-24 1955-09-13 Rotareaed Corp Conditioning paper-making stock
US2754968A (en) * 1950-03-09 1956-07-17 Stamicarbon Treatment of liquid materials in a hydrocyclone
US3235090A (en) * 1961-12-15 1966-02-15 Univ Oklahoma State Hydroclones
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US3724674A (en) * 1969-07-03 1973-04-03 R Loison Heads for hydrocyclonic separators
US3754655A (en) * 1972-02-07 1973-08-28 Bird Machine Co Vortex-type slurry separator
US3764005A (en) * 1971-02-22 1973-10-09 Boise Cascade Corp Hydrocyclone pulp cleaner

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US2754968A (en) * 1950-03-09 1956-07-17 Stamicarbon Treatment of liquid materials in a hydrocyclone
US2709397A (en) * 1950-07-19 1955-05-31 Dorries A G Vorm Maschinenfabr Tubular hydro-extractor for purifying suspensions of fibrous material
US2717536A (en) * 1952-12-24 1955-09-13 Rotareaed Corp Conditioning paper-making stock
US3235090A (en) * 1961-12-15 1966-02-15 Univ Oklahoma State Hydroclones
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US3716137A (en) * 1969-03-21 1973-02-13 Celleco Ab Cyclone separator
US3724674A (en) * 1969-07-03 1973-04-03 R Loison Heads for hydrocyclonic separators
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Cited By (18)

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Publication number Priority date Publication date Assignee Title
US3940331A (en) * 1974-11-01 1976-02-24 Rastatter Edward L Vortical cyclone cluster apparatus
US3984308A (en) * 1974-11-01 1976-10-05 Rastatter Edward L Vortical cyclone cluster apparatus
US4197193A (en) * 1975-10-21 1980-04-08 J. M. Voith Gmbh Apparatus for classifying the constituents of dilute suspensions of fibers
US4392950A (en) * 1977-08-23 1983-07-12 The Bauer Bros. Co. Centrifugal type cleaner
US4146469A (en) * 1977-10-11 1979-03-27 Clark & Vicario Corporation Mounting of cleaners in papermaking system
DE2758620A1 (de) * 1977-10-11 1979-04-12 Clark & Vicario Corp Vorrichtung zum reinigen und entlueften einer papierstoffsuspension
DE3216105A1 (de) * 1980-09-08 1983-11-03 The Dow Chemical Co., 48640 Midland, Mich. Schlammkonzentrator und seine verwendung
EP0096562A3 (en) * 1982-06-04 1984-10-24 The Black Clawson Company Reverse centrifugal cleaning of paper making stock
EP0096562A2 (en) * 1982-06-04 1983-12-21 The Black Clawson Company Reverse centrifugal cleaning of paper making stock
US4956090A (en) * 1988-04-29 1990-09-11 Richard Berg Aktiebolag Hydrocyclone divided into sections
WO1997018168A1 (en) * 1995-11-13 1997-05-22 Ab Ribea Engineering Device for adding oxygen to water
US6149805A (en) * 1995-11-13 2000-11-21 Ab Ribea Engineering Device for adding oxygen to water
US20040068827A1 (en) * 2001-02-24 2004-04-15 James Dyson Vacuum cleaner
US6974488B2 (en) * 2001-02-24 2005-12-13 Dyson Limited Vacuum cleaner
US20040206678A1 (en) * 2001-11-27 2004-10-21 Kazuaki Takahashi Filter device
US7909990B2 (en) * 2001-11-27 2011-03-22 Takahashi Co., Ltd. Filter device
US20150034543A1 (en) * 2009-05-08 2015-02-05 Bengt Eriksson Assembly with multiple hydrocyclones, method for assembling multiple hydrocyclones and support structure for multiple hydrocyclones
US9242253B2 (en) * 2009-05-08 2016-01-26 GL&V Luxembourg S.à.r.l. Assembly with multiple hydrocyclones and support structure for multiple hydrocyclones

Also Published As

Publication number Publication date
NO140705C (no) 1979-10-24
JPS492155A (fi) 1974-01-10
FR2336981B1 (fi) 1979-01-12
AU468387B2 (en) 1976-01-08
FI52431B (fi) 1977-05-31
GB1381239A (en) 1975-01-22
CA1010375A (en) 1977-05-17
NO140705B (no) 1979-07-16
IT982074B (it) 1974-10-21
FR2336981A1 (fr) 1977-07-29
ATA223473A (de) 1975-02-15
JPS5418422B2 (fi) 1979-07-07
FI52431C (fi) 1977-09-12
AU5329273A (en) 1974-09-19
SE361268B (fi) 1973-10-29
AT326474B (de) 1975-12-10
DE2312618C2 (de) 1983-05-05
DE2312618A1 (de) 1973-09-27
ES412698A1 (es) 1976-04-16

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