US3800946A - Hydrocyclones - Google Patents

Hydrocyclones Download PDF

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Publication number
US3800946A
US3800946A US00184055A US3800946DA US3800946A US 3800946 A US3800946 A US 3800946A US 00184055 A US00184055 A US 00184055A US 3800946D A US3800946D A US 3800946DA US 3800946 A US3800946 A US 3800946A
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Prior art keywords
reject
hydrocyclone
outlet
chamber
feed
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US00184055A
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English (en)
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C Reid
B Ronellenfitch
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Elast O Car Prod & Eng Ltd
Elast O Car Prod & Eng Ltd ca
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Elast O Car Prod & Eng Ltd
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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
    • 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
    • B04C5/08—Vortex chamber constructions
    • B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
    • 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

  • a reject passage is located at the apex [51] Int. Cl B0111 21/20 end of Said chamber the inwardly facing Surface of [58] held of Search 55/191 said reject passage being provided with means defining 209/144 210/84 537 a spiral shaped groove along and within which portions of the reject material may travel during passage [56] References C'ted through the reject outlet.
  • the present invention relates to the fractionating of slurries or suspensions by means of hydrocyclones.
  • Hydrocyclones have been in use for a number of years in various fields, for example, the pulp and paper industry and have been found useful for removing certain impurities or forms of dirt of a character unsuited for removal from the pulp by screening.
  • impurities are shives bark, grit and some resinous materials.
  • each hydrocyclone includes a body having an elongated conical chamber of circular cross section.
  • An outlet (termed a reject outlet) for the reject or heavy fraction is provided at the apex of the conical chamber.
  • the lighter or accept fraction of the suspension exits through an axially arranged vortex finder and accept outlet at the opposite end of the conical chamber in the center of the latter.
  • the pulp suspension is introduced into the conical chamber via one or more tangentially directed inlets adjacent the large end of the conical chamber, the liquid simultaneously spiralling inward and downward at increasing velocity.
  • An upflowing helical stream having a maximum diameter approximately equal to that of the accept outlet develops about the central axis and surrounds what is commonly termed an air core.
  • the centrifugal forces involved throw the heavier particles in the suspension outwardly toward the wall of the conical chamber thus causing a concentration of solids adjacent thereto while the lighter particles are brought toward the center of the chamber and are carried upwardly by said upflowing helical stream and outwardly through the accept outlet.
  • the heavier particles are caused to spiral downwardly along the interior wall of the hydrocyclone and eventually pass outwardly of the reject" outlet.
  • the hydrocyclones under consideration may be oriented in various ways i.e., horizontally, vertically or obliquely while maintaining satisfactory performance.
  • the hydrocyclones may be arranged in large banks of several dozen or even several hundred hydrocyclones with common feed, accept, and reject chambers suitably communicating with the hydrocyclones.
  • THE INVENTION Accordingly, it is an object of the present invention to provide an improved method for separating or fractionating liquid suspensions, in a hydrocyclone which method reducers reject outlet plugging, reduces losses of the light fraction of the suspension, and keeps separation efficiency and overall throughput or production at high levels.
  • an improved method of separating or fractionating liquid suspensions in a hydrocyclone having a body defining an enclosed chamber shaped such that it decreases in cross-sectional size from its large end down to its smaller apex end, with a reject outlet por tion at the smaller apex end of the chamber for releasing a heavier fraction of the suspension from the chamber, an accept outlet located generally axially of the chamber at the larger end thereof for releasing a lighter fraction of the suspension from the chamber, and a tangential inlet adjacent the larger end of the chamber.
  • the method comprising introducing the suspension under sufficient pressure through the tangential inlet into the interior of the chamber so as to produce a fluid vortex within the chamber which surrounds a gaseous core extending along the longitudinal axis of said chamber.
  • the fluid vortex causes heavier fractions of the suspension to be forced outwardly against the wall of the chamber and to be thereafter passed toward and through the reject outlet portion with the lighter fractions of the suspension remaining inwardly of the heavier fractions and being thereafter passed along the axially extending gaseous core, and through the accept outlet.
  • This formation as seen in a crosssection view taken along the axis, includes a spaced pair of side walls both of which are directed inwardly toward the axis and an inwardly facing top wall extending between those portions of the side walls which are nearest the axis, with the groove being defined between the side walls of adjacent spaced convolutions of the formation.
  • the formation and the groove defined thereby extend to the extreme end of the reject outlet, and the portions of the heavier fraction continually travel along and within the spiral groove and escape from it at the extreme end of the reject outlet regardless of diameter fluctuations of the gaseous core which might otherwise interfere with movement of the heavier portions and tend to momentarily block the reject outlet portion.
  • FIG. 1 is a longitudinal cross-section view of typical hydrocyclones according to the invention as they appear when installed in a hydrocyclone separator;
  • FIGS. 2 and 3 are transverse cross-sectional views taken along lines 22 and 33 respectively in FIG. 1;
  • FIG. 4 is a longitudinal section view illustrating in detail the configuration of the hydrocyclone reject outlet
  • FIG. 5 is a fragmentary sectional view illustrating in detail a portion of the configuration shown in FIG. 4.
  • FIG. 6 is a view similar to FIG. 1 for the purpose of giving specific dimensional details of a typical hydrocyclone construction
  • FIGS. 7, 8 and 9 are graphs illustrating the performance of the hydrocyclone.
  • FIG. 1 there are shown typical hydrocyclones 10 according to the invention disposed in a hydrocyclone separator, only a small portion of which is shown.
  • the hydrocyclones are shown mounted in spaced apart walls 12, 14 and 16, the latter serving to define a discharge or reject region 18, a feed or inlet region and an accept region 22.
  • Suitable seals e.g., labyrinth seals 21, prevent leakage of material from one region to the other.
  • Each hydrocyclone 10 includes a hollow body portion 24 formed of a suitable wear and abrasion resistant material. Polyurethane elastomers suitable for this purpose have been developed and are preferred.
  • the interior of the hollow body 24 is of generally elongated conical configuration having a circular cross section, the apex of which has a reject outlet passage 26 extending axially therethrough while the opposite end or base 28 is provided with an axially extending accept outlet 30 the latter including a vortex finder 32 which extends axially part way into the interior of the hydrocyclone body for reasons well known in the art.
  • the accept outlet 30 of each hydrocyclone communicates with the accept region 22; their feed inlets 34 all communicate with feed region 20, while their reject outlets 26 all communicate with the reject region 18.
  • the fluid pressure in feed region 20 is the highest of all e.g., 24-26 psig
  • the reject region 18 typically has a much lower pressure e.g., 10 or ll psig while the accept region 22 has a pressure which is lower still e.g., 9 or 10 psig.
  • the overall operation of the hydrocyclone is well known.
  • the liquid suspension enters the tangential feed inlet 34 under pressure and thus sets up a fluid vortex 36 in the interior of the hydrocyclone.
  • the resulting centrifugal forces throw the heavier particles in the suspension outwardly against the interior wall 23 of the hydrocyclone while the lighter fractions remain more closely toward the central axis of the latter, along which the previously mentioned air core extends, such lighter fractions being brought along such central axis and passing outwardly through the accept outlet 30 (often termed the overflow outlet).
  • the heavier fraction travels. in the opposite direction and passes through the reject outlet 26 (often termed the underflow outlet).
  • the interior wall of the reject outlet passage 26 is provided with spiral screw-thread-like formations 42 which define spiral shaped grooves therebetween and which extendin a plurality of convolutions about the axis of the hydrocyclone.
  • a two-start arrangement is shown in FIG. 4 i.e., two thread-like spirals apart, each with about a one inch lead.
  • the individual spiral thread-like formations are of a generally rectangular cross sectional shape with the spacing between these formations (which determines the groove width) being roughly equal to their width.
  • Each screw thread-like formation as shown includes a spaced pair of side walls 42a, 42b which are directed inwardly toward the center of the hydrocyclone chamber and an inwardly facing top wall 42c extending between those portions of side walls 42a, 42b which are nearest the coneaxis.
  • Groove 42 is, of course, defined between the side walls 42a, 42b of adjacent screw thread-like formations.
  • the reject outlet passage 26, which appears as an extension of the interior wall 23 of the hydrocyclone, tapers down in diameter towards the tip of the apex and the passage diameter at the extreme tip may, for example, be about one-half that at the entrance to the reject passage.
  • the embodiment shown has the screw threads spiralling in the right hand direction (looking toward the apex of the hydrocyclone as seen in FIG.
  • the screw threads can twist in the opposite sense i.e., in the same direction as the direction of rotation of the fluid vortex.
  • the surface of the air core will always be found to be irregular due to the continuous disturbance from progressive waves thereon analogous to the behaviour which occurs in convergent nozzles. This phenomena is described in a paper by A.M. Binnie, Proceedings of the Royal Society A 205,530 (1951) to which the interested reader may refer for further information.
  • the air core can show other irregularities. Generally, it is of constant diameter through its length but the diameter increases with increasing flow rate up to a point where further increase has no apparent effect. When rotational velocity adjacent to the air core is impeded however, this ceases to be true and the air core diameter diminishes or the core may even collapse. This may occur within the vortex finder or when solids accumulate in the reject outlet passage.
  • a certain minimum fluid flow rate is required to establish a full air core (i.e., an air core extending entirely through the hydrocyclone including the vortex finder and the reject outlet passage) and additional increase in flow rate causes the air core to expand. Expansion of the air core can in some cases be so great that the air core occupies the whole of the reject outlet passage thus preventing flow of the rejected fraction therethrough.
  • volume split may be mathematically defined as the volume rate of the reject flow divided by the volume rate of the accept flow.
  • This volume split can be altered by applying back pressure to the liquid stream issuing from the hydrocyclone outlets.
  • the air core diameter is dependent on the hydrocyclone accept pressure condition and, as mentioned above, such diameter increases with an increase in flow rate. This means that the flow rate also affects the volume split and the manner in which it affects it is quite complicated. For a small hydrocyclone, the air core has a greater influence on the volume split than has the air core on a large hydrocyclone.
  • Fiber suspensions behave very much like water because of the relatively low concentration of solids. The fibers'are themselves lighter than water. Thus the underflow can be starved to a greater degree without collapse of the air core.
  • the helical groove in the reject passage 26 is defined by a relatively course double screw thread 42 with the top wall 42c of the threads (that portion nearest the hydrocyclone axis) defining an imaginary surface that is generally conical with, preferably, but not necessarily, the same included angle as the section of the hydrocyclone chamber above the threaded section. From observations, it appears that the air core of the hydrocyclone developes in this conical region defined by the imaginary surface referred to above. Firstly, let us consider a hydrocyclone without the screw threaded portion i.e., a smooth walled reject outlet passage.
  • spiral grooves provided in the reject passage in accordance with the present invention provide what could be termed an escape route for the heavier solids at all times regardless of the relative diameter of the air core.
  • these heavier solids will always be able to escape from the hydrocyclone even after great fluctuations in the size of the air core which can be caused by fluctuations in the feed, temporary partial plugging of the feed inlet by over-size particles and other practical considerations such as unscheduled plant shut downs due to power failure etc.
  • the hydrocyclone of the present invention functions in such a way that as the solids are flung by centrifugal force against the interior wall of the conical chamber and move downwardly, the spiral grooves between the screw threads 42 provide an escape route at all times and at the smallest diameter of the reject passage 26 (at the extreme apex end of the cone), there will always be room for some solids to be rejected by way of the grooves between the threads even if the central region of the reject passageway is instantaneously or momentarily "closed” by the air core. At the same time the material discharged from the grooves will contain the unwanted dirt, bark, etc. that was removed from the fiber. Thus the reject flow never ceases and the plugging tendency is greatly reduced. This latter observation is born out by tests of the hydrocyclone carried out in a large pulp mill. The records indicate a substantial reduction in plugging tendency when the hydrocyclones of the present invention are used.
  • the spiral grooves provided in accordance with the present invention also influence the reject rate (which is the percentage ratio of the dry weight of the pulp in the reject fraction to the dry weight of pulp in the infeed). From all available sources including practical experience, it is apparentthat for controlled cleaning of suspensions, for example fiber suspensions, air core stability in the reject outlet passageway is necessary for reasonable control of the volume split and consequently the reject rate.
  • the spiral grooves provided in the hydrocyclone of the present invention permit solids to find their way out under pressure without interfering with the air,core, which solid particles, in a smooth walled arrangement, could otherwise impede rotational velocity adjacent the air core and cause the air core to break down thus causing sudden loss of acceptable slurry through the reject outlet.
  • the hydrocyclone according to the present invention including spiral grooves in the reject outlet is capable of operating at higher capacities compared with a hydrocyclone of the same dimensions (except for a larger feed inlet opening in the hydrocyclone of the invention) which is operating under the same conditions and which does not include such spiral grooves.
  • the air core diameter will be larger and the annulus existing between the air core and the imaginary conical surface defined by the top wall 42c or inwardly facing surface of the screw threads at the smallest diameter of the reject outlet passage will be reduced in thickness, but since the grooves defined by the thread are present, the problem of increasing the risk of intermittent loss of flow which could cause either blockage or inefficient smoke ring discharge is absent due to the escape route provided by such grooves as described previously.
  • Test results suggest an increase in capacity utilizing the hydrocyclone according to the present invention over a conventional hydrocyclone of the same overall size operating under the same conditions. Equivalent cleaning efficiency and a lower reject rate are achieved at the same time by the hydrocyclone of the invention.
  • Hydrocyclones in accordance with the present invention have been used very successfully in treating pulp at higher temperatures e.g., between and F. under high feed consistencies of between 0.55 and 0.65. Under the above conditions, conventional hydrocyclones experienced severe plugging problems.
  • the use of a spiral groove in hydrocyclones in accordance with the present invention reduce the number of cones plugged in one weeks operation at a pulp mill in a unit employing 400 hydrocyclones from between five percent or more to one percent under the identical conditions.
  • the imaginary surface formed by the top wall 42c (inwardly facing surface) of the threads should be conical.
  • the thread should preferably, but not necessarily, be a multiple thread, with the edges of the thread, as seen in cross-section, being slightly rounded.
  • Both the lead and pitch of the thread should be chosen so as to control the ratio of the surface area of the top wall 420 of the thread to the total area of the threaded section to the proportion required depending on operating variables.
  • the thread groove need not be of constant depth and its profile can change along its length.
  • the profile of the thread groove can vary greatly e.g., can be semicircular, semi-elliptical, rectangular and so on. In general, each design depends somewhat on operating variables such as feed consistency, temperature, type of suspension, capacity, etc.
  • FIGS. 2 and 3 illustrate threads cut in a negative direction.
  • the fluid vortex 36 (designated by the arrow) rotates in a counterclockwise direction; as seen in FIG. 3, the screw threads are in such a direction that the reject material passing along the grooves defined thereby rotates in a clock-.
  • Example I With higher feed consistencies at higher or equal oper- In Example I the helical thread in the negative direcating temperatures it appears that the higher turbution i.e. oppositely directed to direction of feed inlet. lence developed must decrease air core stability result-
  • the hydrocyclone was supplied with wood pulp slurry ing in higher reject rates and lower cleaning efficienat 90 100 F. Specific data is given in Table I which eies. In the latter case, it has been found desirable to f llo TABLE 1 T (Wood Pulp Slurry Feed temperature 90 I00F).
  • PSIG Test Capacity Pressures
  • Consistency AD Reject Dirt Count/(grams) Per Cent No. (Total throughput) Feed Accepts Rejects Feed Reject Rate Feed Accept Efficiency Oulet Outlet 1.
  • I05 U.S. gals/min. 24 9 ll 0.280 0.428 4.0% 255 33.0 86.0% 2.
  • do. 24 9 l0 0.295 0.320 10.0% 234 49.l 79.0% 3.
  • the "reject consistency is the percent ratio of the dry pulp contained in the rejects fraction e.g., 0.428 percent consistency means 0.428 percent of the rejected fraction is pulp.
  • Feed consistency indicates the percent of pulp in the infeed in like manner.
  • the Reject Rate is the percent ratio of the dry weight of the pulp in the reject fraction to the dry weight of pulp in the infeed.
  • the percent Efficiency represents the percent of dirt removed from the incoming feed as given by the feed and accept dirt counts.
  • Table IV gives the results of a test carried out on a hydrocyclone having the same overall dimensions as those of Examples 1 and 11 but wherein the spiral grooves were absent and spaced, parallel, ring-type choking members used instead.
  • This by the present invention are apparent f a ihydrocyclone was supplied with wood pulp slurry at a relatively high temperature (120 130F.) and the results of the tests carried out thereon are set out in Table 11 which follows:
  • Table 11 son of Tables 11 and 1V (compare in particular Test 6, Table 11, to Test 1, Table 1V, both having A p 21 psi).
  • Test Capacity Pressure Feed Con- Reject Cleaning No. Total Through- AP (psi) sisteney(% of Rate Efficiency put) U.S. gals/min. dry pulp infeed)
  • a P difference between feed pressure and accept pressure.
  • FIG. 9 plots percent Efficiency vs. reject rate for the three different values of A P and feed consistency of Table 11. The following observations may be made in connection with Example 11 and Table 11.
  • Example 11 It is also believed to be appar eht fr om a review of Tapreferable at low feed consistencies and normal infeed 100F), but that the positive thread of Example 11 is preferable under higher feed consistencies and higher (120 130F) infeed temperatures.
  • the present invention was found to be about 1/5 that experienced when using the above mentioned prior art hydrocyclones.
  • a method of separating or fractionating liquid suspensions in a hydrocyclone having a body defining an enclosed chamber shaped such that it decreases in cross-sectional size from its large end down to its smaller apex end, with a reject outlet portion at the smallerapex end of said chamber for releasing a Table IV (Prior Art Hydrocyclone) (Wood Pulp Slurry Feed Temperature l l F) Test Capacity Pressure Feed Con- Reject Cleaning No (Total Through- A P (psi) sistency of Rate EtTciency put) U.S. gals/min.
  • Table IV Prior Art Hydrocyclone
  • Table IV Prior Art Hydrocyclone
  • Test Capacity Pressure Feed Con- Reject Cleaning No Total Through- A P (psi) sistency of Rate EtTciency put) U.S. gals/min.
  • the method comprising introducing the suspension under sufficient pressure through said tangential inlet into the interior of said chamber so as to produce a fluid vortex within said chamber which surrounds a gaseous core extending along the longitudinal axis of said chamber said fluid vortex causing heavier fractions of the suspension to be forced outwardly against the wall of said chamber and to be thereafter passed toward and through said reject outlet portion with the lighter fractions of the suspension remaining inwardly of the heavier fractions and being thereafter passed along the axially extending gaseous core, and through said accept outlet, characterized in that portions of said heavier fraction, such as heavy particles and the like, travel along a spiral groove provided by a screw-thread-lilte formation having a plurality of spaced convolutions which spiral around said axis, and defined in or on the in

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US00184055A 1970-09-28 1971-09-27 Hydrocyclones Expired - Lifetime US3800946A (en)

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CA94215 1970-09-28
CA121,004A CA941753A (en) 1970-09-28 1971-08-20 Hydrocyclones

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CA (1) CA941753A (enrdf_load_stackoverflow)
DE (1) DE2148422C3 (enrdf_load_stackoverflow)
FI (1) FI54682C (enrdf_load_stackoverflow)
FR (1) FR2108610A5 (enrdf_load_stackoverflow)
GB (1) GB1349465A (enrdf_load_stackoverflow)
SE (1) SE393544B (enrdf_load_stackoverflow)

Cited By (20)

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Publication number Priority date Publication date Assignee Title
US3971718A (en) * 1973-07-20 1976-07-27 Elast-O-Cor Products & Engineering Limited Hydrocyclone separator or classifier
DE2852233A1 (de) * 1977-12-02 1979-06-07 Cellwood Grubbens Ab Wirbelreiniger
US4163719A (en) * 1977-01-26 1979-08-07 Elast-O-Cor Products & Engineering Limited Hydrocyclone separator arrangement
US4224143A (en) * 1979-01-11 1980-09-23 Liller Delbert I Construction of shallow dish with tapered orifice for streamlined flow cyclone washing of crushed coal
US4341352A (en) * 1979-08-06 1982-07-27 Liller Delbert I Method of coal washing at low speed pumping
US4451358A (en) * 1981-11-19 1984-05-29 The Black Clawson Company Noncircular rejects outlet for cyclone separator
US4510056A (en) * 1981-12-04 1985-04-09 Ab Celleco Hydrocyclone separator
WO1989011339A1 (en) * 1988-05-20 1989-11-30 Conoco Specialty Products Inc. Cyclone separator apparatus
US5250093A (en) * 1992-03-09 1993-10-05 O. I. Corporation Water management device for gas chromatography sample concentration
US5653347A (en) * 1992-06-30 1997-08-05 Cyclotech Ab Cyclone separator
US5980639A (en) * 1998-06-30 1999-11-09 Richard Mozley Limited Hydrocyclones and associated separator assemblies
US6129217A (en) * 1996-03-29 2000-10-10 Corn Products International, Inc. Hydrocyclone and separator assemblies utilizing hydrocyclones
US6517733B1 (en) 2000-07-11 2003-02-11 Vermeer Manufacturing Company Continuous flow liquids/solids slurry cleaning, recycling and mixing system
US20040144256A1 (en) * 2003-01-28 2004-07-29 Mazzei Angelo L. Enhanced separation and extraction of gas from a liquid utilizing centrifugal forces
US20130146261A1 (en) * 2011-12-07 2013-06-13 Hyundai Motor Company Radiator for Vehicle
US20130146260A1 (en) * 2011-12-07 2013-06-13 Hyundai Motor Company Radiator for vehicle
CN107107077A (zh) * 2014-11-28 2017-08-29 威立雅水务解决方案与技术支持公司 防堵塞水力旋流器
WO2020047592A1 (en) * 2018-09-04 2020-03-12 Weir Minerals Australia Ltd Dewatering method and system
US20220373199A1 (en) * 2021-05-21 2022-11-24 Yu Gon KIM Multi-stage dehumidification system for local area dehumidification of dry room
US20240042460A1 (en) * 2021-04-12 2024-02-08 Supercritical Fluid Technologies, Inc. Gas-liquid separator assembly

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SE403441B (sv) * 1977-01-05 1978-08-21 Skardal Karl Arvid Virvelrenare med i dess avsmalnande del axiellt anordnade och i direkt forbindelse med varandra staende kammaravsnitt
SE412529B (sv) * 1977-03-07 1980-03-10 Celleco Ab Anordning vid en hydrocyklonseparator for att minska risken for forlust av lett fraktion och igensettning av den tunga fraktionens utloppsoppning
AU1447083A (en) * 1982-06-04 1983-12-08 Black Clawson Company, The Reverse centrifugal cleaning of paper making stock
SE435581B (sv) * 1982-08-16 1984-10-08 Celleco Ab Forfarande for uppdelning av en blandning av en relativt tyngre fibersuspension (accept) och letta fororeningar (reject)
AU3034884A (en) * 1983-07-14 1985-01-17 Black Clawson Company, The Reverse centrifugal cleaning of stock
EP0152438B1 (en) * 1983-08-11 1989-12-06 Conoco Specialty Products Inc. Liquid separator apparatus
DE3832986A1 (de) * 1988-09-29 1990-04-12 Escher Wyss Gmbh Papierstoffreiniger
CN107597451A (zh) * 2017-11-03 2018-01-19 赵振宝 一种中药制造用固液离心分离式分离机

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GB910797A (en) * 1959-04-23 1962-11-21 Svenska Flaektfabriken Ab Improvements in cyclone separators
US3399770A (en) * 1966-01-19 1968-09-03 Beloit Corp Method for centrifugal separation of particles from a mixture
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US2222930A (en) * 1939-04-14 1940-11-26 Gerald D Arnold Centrifugal separator
GB910797A (en) * 1959-04-23 1962-11-21 Svenska Flaektfabriken Ab Improvements in cyclone separators
US3399770A (en) * 1966-01-19 1968-09-03 Beloit Corp Method for centrifugal separation of particles from a mixture
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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971718A (en) * 1973-07-20 1976-07-27 Elast-O-Cor Products & Engineering Limited Hydrocyclone separator or classifier
US4163719A (en) * 1977-01-26 1979-08-07 Elast-O-Cor Products & Engineering Limited Hydrocyclone separator arrangement
DE2852233A1 (de) * 1977-12-02 1979-06-07 Cellwood Grubbens Ab Wirbelreiniger
FR2410511A1 (fr) * 1977-12-02 1979-06-29 Cellwood Grubbens Ab Epurateur a cyclone, notamment pour pate a papier
US4224145A (en) * 1977-12-02 1980-09-23 Cellwood Grubbens Ab Vortex cleaner
US4224143A (en) * 1979-01-11 1980-09-23 Liller Delbert I Construction of shallow dish with tapered orifice for streamlined flow cyclone washing of crushed coal
US4341352A (en) * 1979-08-06 1982-07-27 Liller Delbert I Method of coal washing at low speed pumping
US4451358A (en) * 1981-11-19 1984-05-29 The Black Clawson Company Noncircular rejects outlet for cyclone separator
US4510056A (en) * 1981-12-04 1985-04-09 Ab Celleco Hydrocyclone separator
WO1989011339A1 (en) * 1988-05-20 1989-11-30 Conoco Specialty Products Inc. Cyclone separator apparatus
US5250093A (en) * 1992-03-09 1993-10-05 O. I. Corporation Water management device for gas chromatography sample concentration
US5358557A (en) * 1992-03-09 1994-10-25 O.I. Corporation Water management device for gas chromatography sample concentration
US5470380A (en) * 1992-03-09 1995-11-28 O. I. Corporation Management device for gas chromatography sample concentration
US5582633A (en) * 1992-03-09 1996-12-10 O.I. Corporation Water management device for gas chromatography sample concentration
US5814128A (en) * 1992-03-09 1998-09-29 Oi Corporation Water management device for gas chromatography sample concentration
US5653347A (en) * 1992-06-30 1997-08-05 Cyclotech Ab Cyclone separator
US6129217A (en) * 1996-03-29 2000-10-10 Corn Products International, Inc. Hydrocyclone and separator assemblies utilizing hydrocyclones
US5980639A (en) * 1998-06-30 1999-11-09 Richard Mozley Limited Hydrocyclones and associated separator assemblies
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Also Published As

Publication number Publication date
FI54682B (fi) 1978-10-31
DE2148422C3 (de) 1974-07-11
CA941753A (en) 1974-02-12
FI54682C (fi) 1979-02-12
DE2148422B2 (enrdf_load_stackoverflow) 1973-12-06
SE393544B (sv) 1977-05-16
FR2108610A5 (enrdf_load_stackoverflow) 1972-05-19
DE2148422A1 (de) 1972-03-30
GB1349465A (en) 1974-04-03

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