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US3052401A - Regulating device for centrifugal separators - Google Patents

Regulating device for centrifugal separators Download PDF

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Publication number
US3052401A
US3052401A US782430A US78243058A US3052401A US 3052401 A US3052401 A US 3052401A US 782430 A US782430 A US 782430A US 78243058 A US78243058 A US 78243058A US 3052401 A US3052401 A US 3052401A
Authority
US
United States
Prior art keywords
slide
line
discharge
separator
bowl
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
US782430A
Other languages
English (en)
Inventor
Thylefors Henric Wilhelm
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.)
Alfa Laval Holdings Amsterdam AB
Original Assignee
Separator AB
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
Application filed by Separator AB filed Critical Separator AB
Application granted granted Critical
Publication of US3052401A publication Critical patent/US3052401A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B11/00—Feeding, charging, or discharging bowls
    • B04B11/02—Continuous feeding or discharging; Control arrangements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
    • B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87829—Biased valve
    • Y10T137/87837—Spring bias

Definitions

  • This invention relates to centrifugal separators and particularly to an improved device for regulating the flow to and from a centrifugal separator.
  • the outlet is provided with a paring means in direct communication with a discharge pipe line or this pipe line is connected to a pump arranged in the outlet from the separator bowl.
  • the pressure energy or velocity energy of the separated liquid leaving the separator may be utilized for the transport of the liquid through the pipe line to the de sired point of delivery.
  • centrifugal separators of the well known type provided with a liquid seal the latter under unfavorable conditions may be destroyed, with the result that the material to be separated discharges over the overflow outlet for the liquid in the liquid seal.
  • the position of the boundary surface between the separation components in the centrifugal bowl is of the utmost importance for the desired separation result.
  • the boundary surface may easily be displaced in one direction or the other by changing the pressure in the outlets.
  • a problem appears in that it is difficult to attain the best position for the boundary surface owing to the ditficulty of determining when the boundary surface is in this position.
  • the present invention has for its principal object the provision of a centrifugal separator having a regulating device which overcomes the above-noted problems.
  • a separator made according to the invention has a return line by which the feed line to the centrifugal bowl is connected to a discharge line leading fom the bowl.
  • a shut-off device which preferably is spring-loaded.
  • This shut-off device is movable and has a first extreme position for closing the feed line while the return line is open, and opposite extreme position for closing both the feed line and the return line, and an intermediate position for closing the return line while the feed line is open.
  • the separator also has means for moving the shut-off device in response to variations in the difference between the pressures in the feed and discharge lines.
  • FIG. 1 is a schematic view of a centrifugal separator embodying the new regulating device
  • FIG. 2 is a vertical sectional View of the centrifugal bowl of the separator
  • FIG. 3 is a longitudinal sectional View of the regulating device proper.
  • reference numeral 1 designates a centrifugal separator having a feed line 2 and a discharge line 3.
  • the feed and discharge lines both pass through a regulating device 5.
  • the outlet of the centrifuge 1 is provided with a paring means or a discharge pump. With respect to its inlet, the centrifuge may be of the hermetic type or totally open.
  • a centrifuge bowl 6 in which the inlet is open and the outlet has a paring means, is shown in FIG. 2.
  • the paring means as there shown comprises a con ventional paring disc 7 connected to a discharge tube 3a.
  • a feed tube 2a opens into a distributing chamber 8 from which the material to be separated is led in the usual manner through distributing channels 9 into the separation chamber.
  • the latter contains bowl discs 10 and a top disc 11 which extends outside the bowl discs 10 and together with the heavier liquid component forms a liquid seal from which excess liquid discharges through an outlet 12.
  • the separated lighter liquid component passes between the top disc 11 and the distributor 13 to the chamber in which the stationary paring disc- 7 is arranged, the liquid being picked up by the parer 7 in the well known manner and discharged through tub 3a, regulator 5 and pipe 3.
  • the regulating device 5 which is shown in detail in FIG. 3, is provided with two connecting flanges 14, 15 by which the pipes 2 and 3, respectively, in FIG. 1 are connected to two throughflow passages 15, 17, respectively. These passages at their inner ends lead to pipe fittings 18 and 19, respectively, which are connected in any suitable maner to the feed tube 2a and discharge tube 3a, respectively, in FIG. 2.
  • a communication channel or return line 20 which can be closed by means of a slide or piston 21.
  • the latter is connected through a valve spindle 22 with a valve 23 and is actuated by a compression spring 24 which tends to displace the slide and the valve so that the latter bears against a seat 25 formed in the channel 16.
  • the valve spindle 22 is provided with a stop 26, such as a disc, which, when the valve 23 rests against the seat 25, may be actuated by a lever 27 for withdrawing the valve from the seat 25.
  • the slide 21 is acted upon by the spring 24, and also by the liquid pressure in the channels 16, 17.
  • a valve or slide 28 which is biased by a spring 29, the compression of which can be adjusted by means of a screw 30.
  • the valve 28 is actuated by the liquid pressure in the channel 17 against the action of spring 29.
  • the rate of discharge through line 3 may be regulated by means of the valve 4 without any risk of over-flowing of the bowl.
  • the slide 21 and valve 23, which form a movable shut-off device take approximately the mean position shown in FIG. 3, where the pressure from the liquid in the discharge passage 17 acting upon the slide 21 is balanced by the pressure of the spring 24 and the liquid pressure in the passage 16.
  • the pressure of the spring 29 acting upon the slide 28 must, of course, be so adjusted in relation to the liquid pressure in the passage 17 of discharge line 3 that this slide does not close the line 3.
  • the non-return valve 28 comes into operation and closes the discharge line 3 so that the liquid therein does not rush back to the paring disc 7 and into the separator.
  • the separation may be resumed by loosening the valve 23 from the seat 25 by means of the lever 27 and the stop 26.
  • the compression of the spring 29 be adjustable by means of the screw 3%, if the separation is carried out under constant running conditions.
  • the spring 29 by arranging the spring 29 so that it can be adjusted, it is possible to utilize this adjustment to counteract changes in the operating conditions and also to effect displacement, in a centrifugal separator of the purifier type, of the boundary surface between the two separation components to the best position in the separator bowl. That is, by increasing the compression of spring 29, the liquid pressure in the bowl outlet may be increased and thus the position of this boundary surface may be changed. The boundary surface may thus be displaced so iar that the liquid seal in the separator bowl is destroyed, both the separation components then discharging through the outlet 12 for the heavier component.
  • the regulating device may be made as an independent unit. However, as indicated in FIG. 3, it may alternatively be built into the shaft around which the usual frame cover (covering the separator bowl) is arranged to swing.
  • the shaft is tubular and has two parts 31, 32 which are supported by brackets 33, 34 projecting from the lower part of the separator frame.
  • the intermediate part 35 may be a part of the frame cover, and those parts of the feed and discharge lines which are between the regulating device 5 and the separator bowl 6 may consist of channels arranged in this cover.
  • the intermediate part 35 as shown, is pivotally mounted on the parts 31 and 32 and is sealed against them by means of sealing rings 36, 37.
  • the parts 31, 32, 35 thus form a housing of the regulating device 5.
  • centrifuge bowl proper an embodiment of which is shown only schematically in FIG. 2, should, of course, be formed by an upper and a lower part held together with a locking ring or in any other suitable manner, as is well known in the art.
  • the centrifuge bowl may, if desired, be provided with nozzle openings and be arranged for automatic, intermittent, or continuous sludge discharge.
  • the centrifuge outlet may be provided with a pump, such as a centrifugal pump, by means of which the separated lighter liquid component is fed to the discharge line 3 from the centrifugal bowl.
  • a feed line leading to the bowl for delivering thereto a feed material to be separated, and a discharge line leading from the bowl for discharging a separated component of the material the combination of a return line connecting said feed line and said discharge line, a movable shutoff device in the return line, said shut-off device having a first extreme position for closing said feed line while the return line is open, an opposite extreme position for closing both the feed line and the return line, and an intermediate normal position for closing said return line while the feed line is open, and means for moving the shut-off device in response to variations in the diiference between the pressures in said feed and discharge lines, said pressure-responsive means being operable to move the shut-off device to its first extreme position in response to an increase in the discharge line pressure relative to the feed line pressure and to move the shut-off device to said opposite extreme position in response to a decrease in the discharge line pressure relative to the feed line pressure.
  • shut-01f device includes a slide
  • said moving means including a housing containing the slide and having passages through which the pressures in said feed line and said discharge line are operable on the slide in opposing directions, respectively.
  • shut-oif device includes a slide
  • said moving means including a housing containing the slide and having passages through which the pressures in said feed line and said discharge line are operable on the slide in opposing directions, respectively, said moving means also including a biasing element urging the slide in one of said directions.
  • shut-off device includes a slide
  • said moving means including a housing containing the slide and having a passage through which the pressure in the feed line is operable on the slide to urge it toward said opposite extreme position, the housing also having a passage through which the pressure in the discharge line is operable on the slide to urge it toward said first extreme position.
  • shut-off device includes a slide
  • said moving means including a housing containing the slide and having a passage through which the pressure in the feed line is operable on the slide to urge it toward said opposite extreme position, the housing also having a passage through which the pressure in the discharge line is operable on the slide to urge it toward said first extreme position, and a spring urging the slide toward said opposite extreme position.
  • shut-ofi device includes a slide
  • said moving means including a housing containing the slide and having a passage through which the pressure in the feed line is operable on the slide to urge it toward said opposite extreme position, the housing also having a passage through which the pressure in the discharge line is operable on the slide to urge it toward said first extreme position, and a spring urging the slide toward said opposite extreme position, the spring exerting a pressure on the slide which, in the intermediate position of the slide, is equal to the diiference between the opposing pressures exerted on the slide through said passages.

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  • Centrifugal Separators (AREA)
  • Degasification And Air Bubble Elimination (AREA)
US782430A 1957-12-28 1958-12-23 Regulating device for centrifugal separators Expired - Lifetime US3052401A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE860573X 1957-12-28

Publications (1)

Publication Number Publication Date
US3052401A true US3052401A (en) 1962-09-04

Family

ID=20366802

Family Applications (1)

Application Number Title Priority Date Filing Date
US782430A Expired - Lifetime US3052401A (en) 1957-12-28 1958-12-23 Regulating device for centrifugal separators

Country Status (6)

Country Link
US (1) US3052401A (nl)
DE (1) DE1080027B (nl)
FR (1) FR1229681A (nl)
GB (1) GB860573A (nl)
NL (2) NL103636C (nl)
SE (1) SE167902C1 (nl)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135691A (en) * 1959-09-24 1964-06-02 Westfalia Separator Ag Apparatus for achieving the foam-free delivery of liquid material from a centrifuge drum
US3235174A (en) * 1961-01-24 1966-02-15 Aero Flow Dynamics Inc Centrifugal liquid purifier
US3595470A (en) * 1968-10-28 1971-07-27 Pennwalt Corp Control apparatus for centrifuge
US3656685A (en) * 1968-01-09 1972-04-18 Alfa Laval Ab Centrifuge
US3666170A (en) * 1969-05-07 1972-05-30 Glacier Metal Co Ltd Centrifugal separator
US3752389A (en) * 1970-12-07 1973-08-14 Alfa Laval Ab Centrifugal separator with control means
US4147293A (en) * 1977-01-18 1979-04-03 Westfalia Separator Ag Continuously operating solid-jacket counterflow centrifugal extractor
WO2002020118A1 (en) * 2000-09-06 2002-03-14 Baldwin Filters, Inc. Centrifugal filter for removing soot from engine oil
US9358554B2 (en) 2009-11-06 2016-06-07 Alfa Laval Corporate Ab Hermetic centrifugal separator with an outlet pumping configuration

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2144229A (en) * 1934-06-16 1939-01-17 Laval Separator Co De Centrifugal separator
US2445544A (en) * 1945-02-16 1948-07-20 Bendix Aviat Corp Flow-regulating valve
US2496577A (en) * 1945-11-01 1950-02-07 Jack & Heintz Prec Ind Inc Oil pressure regulator
US2509504A (en) * 1945-11-06 1950-05-30 Garrett Corp Aires Mfg Company Cooler failure automatic by-pass valve
US2748947A (en) * 1951-11-10 1956-06-05 A V Roe Canada Ltd Filter by-pass control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2144229A (en) * 1934-06-16 1939-01-17 Laval Separator Co De Centrifugal separator
US2445544A (en) * 1945-02-16 1948-07-20 Bendix Aviat Corp Flow-regulating valve
US2496577A (en) * 1945-11-01 1950-02-07 Jack & Heintz Prec Ind Inc Oil pressure regulator
US2509504A (en) * 1945-11-06 1950-05-30 Garrett Corp Aires Mfg Company Cooler failure automatic by-pass valve
US2748947A (en) * 1951-11-10 1956-06-05 A V Roe Canada Ltd Filter by-pass control

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135691A (en) * 1959-09-24 1964-06-02 Westfalia Separator Ag Apparatus for achieving the foam-free delivery of liquid material from a centrifuge drum
US3235174A (en) * 1961-01-24 1966-02-15 Aero Flow Dynamics Inc Centrifugal liquid purifier
US3656685A (en) * 1968-01-09 1972-04-18 Alfa Laval Ab Centrifuge
US3595470A (en) * 1968-10-28 1971-07-27 Pennwalt Corp Control apparatus for centrifuge
US3666170A (en) * 1969-05-07 1972-05-30 Glacier Metal Co Ltd Centrifugal separator
US3752389A (en) * 1970-12-07 1973-08-14 Alfa Laval Ab Centrifugal separator with control means
US4147293A (en) * 1977-01-18 1979-04-03 Westfalia Separator Ag Continuously operating solid-jacket counterflow centrifugal extractor
US6517475B1 (en) * 1998-09-25 2003-02-11 Baldwin Filters, Inc. Centrifugal filter for removing soot from engine oil
WO2002020118A1 (en) * 2000-09-06 2002-03-14 Baldwin Filters, Inc. Centrifugal filter for removing soot from engine oil
US9358554B2 (en) 2009-11-06 2016-06-07 Alfa Laval Corporate Ab Hermetic centrifugal separator with an outlet pumping configuration

Also Published As

Publication number Publication date
DE1080027B (de) 1960-04-14
NL103636C (nl) 1900-01-01
GB860573A (en) 1961-02-08
NL231529A (nl) 1900-01-01
FR1229681A (fr) 1960-09-08
SE167902C1 (nl) 1959-07-21

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