US3167509A - Centrifugal separator - Google Patents
Centrifugal separator Download PDFInfo
- Publication number
- US3167509A US3167509A US20192262A US3167509A US 3167509 A US3167509 A US 3167509A US 20192262 A US20192262 A US 20192262A US 3167509 A US3167509 A US 3167509A
- Authority
- US
- United States
- Prior art keywords
- bowl
- sludge
- liquid
- chamber
- disc
- 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
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Classifications
-
- 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
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
- B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
- B04B1/16—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl
- B04B1/18—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl controlled by the centrifugal force of an auxiliary liquid
-
- 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
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
- B04B1/12—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with continuous discharge
-
- 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
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
- B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
-
- 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
- B04B1/10—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl
- B04B1/14—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge
- B04B1/16—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with discharging outlets in the plane of the maximum diameter of the bowl with periodical discharge with discharging outlets controlled by the rotational speed of the bowl
Definitions
- the present invention relates to centrifugal separators, and more particularly to the type of automatic self-cleaning bowl-type separators wherein solids or sludge accumulating inside the bowl is periodically discharged from the sludge space in the bowl while the unit continues to run at full speed.
- the de-sludging cycle may be manually controlled. It has also been proposed to provide automatic timing units for actuating solenoid valves forming part of control means for setting the sludge discharge periods.
- the centrifuging time periods between the intermittent desluding periods may be readily determined by examining the solids content of the slurry or liquid mixture fed to the separator and relating the solids content to the throughput of the separator bowl and the sludge space volume of the bowl. Time switches controlled, for instance, by rotating cam means and the like may then be used to energize a control circuit connected to solenoid valves designed to enable the opening and closing of ports for the intermittent discharge of the sludge from the bowl.
- the de-sludging cycle frequency is pro-set, regardless of the amount of sludge in the bowl at any given time during the centrifuging operation.
- a trouble-free operation of the separator bowl can be had only if the sludge discharge ports are opened at the exact time when the sludge space of the bowl is just filled with sludge. If the ports are opened before that time, a lot of useful liquid is lost with the discharged solids and the operation is, therefore, wasteful. If the ports are opened after the sludge space has been filled with sludge, solids will back into the channels of the separator disc set in the center of the bowl and thus impair the clarification of the liquid.
- timing units for the control of the de-sludging cycle presuppose first of all that the solids content of the slurry or liquid mixture to be centrifuged has been exactly predetermined and that the cycle, therefore, has been exactly calculated and set. Furthermore, they also assume that the throughput of the separator bowl and the solids content of the slurry or liquid mixture remain unchanged during the entire operation of the separator.
- the separator receives its charge in many plants from large storage tanks.
- the liquid level in the tank will be constantly lowered, causing a concomitant decrease in the static pressure and a lessening of the throughput.
- gravity will cause the solids to settle near the bottom of the tank so that the solids content of the charge entering the separator will also change during the operation.
- a small tube conducts clarified liquid from the space outside the disc set to a storage vessel which has an opening in its bottom and which rests on a scale.
- a uniform amount of liquid flows through the tube into the vessel and an equal amount of liquid flows out of the vessel through its bottom opening.
- a counterweight of the same weight as the filled vessel keeps the scale in balance.
- the arm of the scale carrying the counterweight pivots downwardly and closes a switch which opens the sludge discharge port means of the bowl.
- the counterweight or the vessel must be changed with different specific weights of different slurries fed to the centrifuge. Also, depending on the sensitivity of the scale, even the smallest changes in the liquid flow may cause opening of the bowl.
- the invention relates to centrifugal seperators of the de-sludging type with periodical discharge of the separated solids through openings in the wall of the bowl which openings can be opened and closed by an axially movable piston arranged in the interior of the bowl.
- Such automatic, self-cleaning separator bowls comprise a rotatable bowl and conical disc means mounted concentrically about the bowl axis and having an outer edge spaced from the bowl periphery.
- the outer edge of the disc means and the bowl periphery define a sludge space, and a stationary feed means, such as a vertical pipe, is arranged coaxially in the bowl to feed a slurry or liquid mixture to the conical discs.
- a sludge discharge means including port means in the bowl periphery is provided for intermittently discharging sludge from the sludge space.
- Means is provided for intermittently opening the sludge port means and control means is provided for actuating the means for opening the sludge discharge port means intermittently.
- a conduit leading from the output of the pump means will return the clarified liquid from the output to the feed chamber of the bowl or to the storage tank. If desired, it may also feed the liquid directly to the clarified phase of the liquid preferably discharged through another centripetal pump means.
- the amount of liquid fed through the conduit means to the first-named centripetal pump means will automatically decrease when the solids layer in the sludge space has reached the one end of the conduit means adjacent the disc means, causing a corresponding decrease in pressure in the output of the pump means.
- the pressure sensitive device is pro-set to a certain minimum pressure and when the pressure in the output falls below it, it will cause actuation of the de-sludgingcycle control means.
- the one end of the conduit means is of enlarged diameter so that accumulation of solids at this end of the conduit means is avoided.
- the illustrated automatic de-sludger with its self-cleaning bowl is particularly suitable for continuous processing of materials that have a relatively high solids content. Continuous operation of the separator bowl is possible be cause the solids can be discharged from the bowl while the unit is running at full speed, thus eliminating the time consuming and often disagreeable chore of manual bowl cleaning. Furthermore, the basic design of this unit is such that conversion to other types of centrifugals through simple exchange of a few bowl parts will adapt the machine for separation and purification, extraction and clarificationf V a I r
- the bowl' consistsof a bottom wall 11 and a conical 'upper wall 2, the peripheral cylindrical portion of the bottom wall being connected'to the upper wall by seal- 7 ing ring 3 which threadedly engages one or both walls.
- a peripheral sludge space'ZZ is defined in the interior of' the bowl by the upper wall 2. and a separating wall 5, a liquid cha distributors being fixedly connected tothe separating wall 5.
- An axially slidable, pressure fluid operated, annular piston is mounted in a pressure fluid cylinder defined by the bottom wall 1 of the bowl and the separator wall 5, an annular skirt 6a extending upwardly from the piston and sliding in an annular space between the periphery of the separator wall 5 and the bottom wall ll of the bowl.
- the separator wall 5 has a first wall portion 5' which is generally parallel to the conical upper wallv 2 of the bowl and, ascending therefrom, a second Wall portion 5" extending towards upper bowl wall '2 but defining therewith an annular gap '7'.
- the cylindrical periphery of the bowl wall 1 defines several ports 7 in alignment with the gap 7.
- the sliding skirt 6a is designed to open and close communication between the gap 7' and ports 7 upon axial movement of the piston 6, the gap and ports constituting a sludge discharge port means in the periphery of the bowl upon opening of communication between the gap and the ports by the pressure fluid operation of piston 6.
- the pressure fluid cylinder is divided by the piston into a discharge means opening chamber 11 and a closing chamber 8.
- the piston is maintained in the illustrated sludge discharge means closing position by a resiliently compressible mass arranged in chamber 8 or by supplying a pressure fluid thereto through suitable pressure fluid supply conduit means (not shown), in a manner well known er se.
- suitable pressure fluid such as water
- the supply of pressure fluid through conduits 9,19 must exceed the amount of fluid escaping through aligned bores 12, 13 in the piston and the cylindrical periphery of the. bowl so as to raise the level of pressure fluid :in the opening chamber.
- valve 15 in supply main 9 is closed to cut off further pressure fluid supply to chamber 11.
- Pressure fluid continues to escape from the rotating bowl through bores 12 and 13 through an annular communicating chamber 43 in the interior of the wall 1 around bore 13 designed to maintain communication between bores 12, 13 in different axial positions of the piston. Escape of pressure fluid from chamber 11 will release the downward pressure on the piston and the resiliently compressible mass or pressure fluid in closing chamber e3 will aagin becomeeifective to move the piston upwardly and close the sludge discharge port Jeans.
- an outlet conduit 28 leads from the space outside the conical disc set 21 to a special centripetal pump means chamber 29.
- the inlet 42 of conduit 28 is arranged adjacent the outer edge of the disc means and normally receives liquid accumulating in the peripheral chamber 22 unless it is shut olf by sludge.
- the liquid component rises through outlet conduit 28 into the centripetal pump means chamber 29 which is defined by the uppermost disc and an annular separating wall 47 extending inwardly from bowl neck portion 45 to separate chamber 29 from chamber 25.
- This liquid component is sucked continuously and under pressure from chamber 29 through a radial intake channel in the stationary paring disc 30 into the pump output which has a branch conduit 31.
- a pressure sensitive device actuated by the pressure in the output conduit and constituted in the illustrated embodiment by a contact manometer 32 of known construction.
- the manometer is set so that this predetermined pressure in the pump output conduit 31 keeps the movable contact 34 away from stationary contact 35, thus keeping the electrical control circuit 48 out of operation.
- the liquid sucked into the stationary disc 30 is returned from the pump outlet through a calibrated bore 36 into the feed chamber 18 of the bowl where it mixes with the liquid charge.
- the programming device 33 which may take any suitable form and forms no part of the present invention, will open valve 15 and close valve 17 after it has received the operating impulse from contact manometer 32.
- valves 15 and 17 When no current is supplied to electrically controlled valves 15 and 17, both valves are closed. Two manually controlled valves 40 and 41 are arranged ahead of the solenoid valves 15 and 17, respectively. Both of these valves are manually opened at the beginning of the centrifuging operation. The programming unit 33 is then actuated to open valve 17 to initiate the liquid charge supply to the bowl. The subsequent programming of the de-sludging cycles has been described hereinabove.
- outlet conduit 28 with a flared inlet 42 of increased diameter to facilitate the centrifugal removal of solids penetrating into the outlet conduit.
- FIG. 2 is generally similar to the bowl of FIG. 1, like parts having been designated by like reference numerals to obviate a duplication of description, and differs therefrom only in the following aspects:
- the discharge conduits 23, 24 lead into a chamber 49 defined by separating wall 47' and a regulating disc 38 mounted on the neck portion of the bowl by threaded ring 50.
- the clarified liquid flows out of chamber 49 over disc edge 37 into a suitable receptacle (not shown).
- the chamber 49 is separated from the centripetal pump chamber 29 by the annular separating wall 47' and an annular baffle member 7 extending inwardly from the centripetal pump output conduit wall.
- An automatic, self-cleaning centrifugal separator comprising a rotatable bowl having an axis and a periphery, conical disc means mounted concentrically about the bowl axis and having an outer edge spaced from the bowl periphery, the outer edge of the disc means and the bowl periphery defining a sludge space, a stationary feed means coaxially arranged in said bowl, a centripetal pump means arranged in said bowl concentrically about said feed means, said centripetal pump means having an intake and an output, said output having an outlet port means, a conduit means connecting said sludge space and said centripetal pump means intake, an inlet end of the conduit means being adjacent the outer edge of the disc means, sludge discharge port means in the bowl peripherytor intermittently discharging sludge from said sludge space, means for intermittently opening the sludge discharge port means, a pressure sensitive device in the output of the centripetal pump means and operated by the pressure in
- centrifugal separator of claim 1 further comprising means for discharging clarified liquid from said bowl and said outlet port means is in communication with said last-named discharge means.
Landscapes
- Centrifugal Separators (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW30161A DE1145100B (de) | 1961-06-13 | 1961-06-13 | Selbsttaetig oeffnende Schleudertrommel einer Schlammzentrifuge |
Publications (1)
Publication Number | Publication Date |
---|---|
US3167509A true US3167509A (en) | 1965-01-26 |
Family
ID=7599423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US20192262 Expired - Lifetime US3167509A (en) | 1961-06-13 | 1962-06-12 | Centrifugal separator |
Country Status (3)
Country | Link |
---|---|
US (1) | US3167509A (fr) |
DE (1) | DE1145100B (fr) |
NL (2) | NL278887A (fr) |
Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3239137A (en) * | 1962-07-19 | 1966-03-08 | Separator Ab | Method of discharging sludge from self-opening centrifuges |
US3255958A (en) * | 1962-12-04 | 1966-06-14 | Westfalia Separator Ag | Centrifugal desludging separator |
US3261546A (en) * | 1962-10-29 | 1966-07-19 | Pfaudler Permutit Inc | Method for clarifying fats and oils |
US3301476A (en) * | 1963-01-26 | 1967-01-31 | Westfalia Separator Ag | Apparatus for signaling a predetermined level in the sludge chamber of a centrifugaldrum |
US3360194A (en) * | 1965-01-25 | 1967-12-26 | Westfalia Separator Ag | Apparatus and method for automatic overload protection in centrifuge equipment |
US3396910A (en) * | 1965-08-17 | 1968-08-13 | Westfalia Separator Ag | Method and apparatus for sensing the fullness of the mud chamber in a centrifugal separator |
US3407999A (en) * | 1966-11-10 | 1968-10-29 | Pennsalt Chemicals Corp | Sludge discharge means for a centrifuge |
US3409214A (en) * | 1965-10-26 | 1968-11-05 | Alfa Laval Ab | Device for indicating the sludge level in sludge centrifuges |
US3415446A (en) * | 1967-04-11 | 1968-12-10 | Carl W. Weiland | Hydraulically actuated valve plate for a centrifuge |
US3416726A (en) * | 1967-05-04 | 1968-12-17 | Dorr Oliver Inc | Bearing mounted overflow impeller |
US3441204A (en) * | 1965-08-27 | 1969-04-29 | Alfa Laval Ab | Device for indicating sludge level in sludge centrifuges |
US3445061A (en) * | 1966-11-14 | 1969-05-20 | Alfa Laval Ab | Apparatus for indicating sludge level in centrifuges |
US3460750A (en) * | 1966-04-21 | 1969-08-12 | Cuccolini Silla | Centrifugal separator |
US3462076A (en) * | 1966-11-04 | 1969-08-19 | Westfalia Separator Ag | Self-cleaning centrifugal separator drum having an external piston valve |
US3494544A (en) * | 1967-05-10 | 1970-02-10 | Alfa Laval Ab | Centrifugal separator |
US3508704A (en) * | 1967-02-08 | 1970-04-28 | Westfalia Separator Ag | Centrifugal separator control |
US3563453A (en) * | 1968-02-23 | 1971-02-16 | Alfa Laval Ab | Method and apparatus for indicating sludge level in sludge centrifuge |
US3593915A (en) * | 1968-09-25 | 1971-07-20 | Westphalia Separator Ag | Controlled desludging of centrifugal separators |
US3595470A (en) * | 1968-10-28 | 1971-07-27 | Pennwalt Corp | Control apparatus for centrifuge |
US3623657A (en) * | 1968-07-08 | 1971-11-30 | Pennwalt Corp | Centrifuge apparatus |
US3637134A (en) * | 1970-01-21 | 1972-01-25 | Laval Separator Co De | Apparatus for indicating the sludge level in centrifuges |
US3761014A (en) * | 1971-05-12 | 1973-09-25 | Mse Holdings Ltd | Centrifuging apparatus |
US3976242A (en) * | 1974-07-27 | 1976-08-24 | Westfalia Separator Aktiengesellschaft | Self-emptying clarifying separator having a foam-free removal of the clarified liquid by means of a paring disk and an automatically operating system for detecting the level of the solids in the sludge chamber |
US4044944A (en) * | 1975-04-24 | 1977-08-30 | Fa. Moebus Kg. | Centrifuge |
FR2477905A1 (fr) * | 1980-03-13 | 1981-09-18 | Kloeckner Humboldt Deutz Ag | Centrifugeuse a bol plein a vidage automatique |
US4643708A (en) * | 1984-09-06 | 1987-02-17 | Alfa-Laval Separation Ab | Centrifuge operating system |
US4718886A (en) * | 1986-02-05 | 1988-01-12 | Westfalia Separator Ag | Continuous-operation centrifuge bowl for concentrating suspended solids |
US4718887A (en) * | 1986-02-12 | 1988-01-12 | Westfalia Separator Ag | Centrifugal separator with a vertical axis and a skimmer |
US4820256A (en) * | 1985-06-07 | 1989-04-11 | Alfa-Laval Separation Ab | Centrifugal separator |
US4929227A (en) * | 1987-10-16 | 1990-05-29 | Westfalia Separator Ag | Centrifuge drum for separating mixtures of liquids |
US5160609A (en) * | 1989-03-31 | 1992-11-03 | Herberg Jan W V D | Centrifugal separator with discharge of separated constituents by braking moment |
WO1996003214A1 (fr) * | 1994-07-22 | 1996-02-08 | Tetra Laval Holdings & Finance S.A. | Procede et equipement pour la surveillance d'un separateur centrifuge |
US6358193B1 (en) * | 1997-09-29 | 2002-03-19 | Alfa Laval Ab | Regulation device for a centrifugal separator to control discharge from outlets |
US6390964B1 (en) * | 1999-05-14 | 2002-05-21 | Westfalia Separator Ag | Device for cooling a centrifugal device and method for centrifuge operation |
US6837842B1 (en) * | 1999-03-08 | 2005-01-04 | Alfa Laval Ab | Method and device for indicating an undesired operation condition of a centrifugal separator |
US20050143245A1 (en) * | 2002-05-08 | 2005-06-30 | Werner Kohlstette | Centrifuge especially a separator |
US20130065744A1 (en) * | 2010-03-19 | 2013-03-14 | Per Karlsson | Device and method for monitoring and adjusting the radial position of an interface layer in a nozzle centrifuge |
EP3885050B1 (fr) | 2020-03-26 | 2022-10-05 | Alfa Laval Corporate AB | Séparateur centrifuge pour la séparation d'un mélange liquide |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB461739A (en) * | 1935-05-23 | 1937-02-23 | Harold William Fawcett | Improvements in or relating to centrifugal separators |
GB483438A (en) * | 1936-07-18 | 1938-04-20 | Separator Ab | An installation comprising self-opening separators for the separation of sludge containing liquids |
US2227837A (en) * | 1937-03-05 | 1941-01-07 | Laval Separator Co De | Dairy installation for separation and purification of milk |
US2344888A (en) * | 1940-10-05 | 1944-03-21 | Laval Separator Co De | Centrifugal separator |
US2378778A (en) * | 1940-12-06 | 1945-06-19 | Laval Separator Co De | Centrifugal separator bowl |
GB813014A (en) * | 1956-02-18 | 1959-05-06 | Separator Ab | Improvements in or relating to centrifugal separators |
US2955754A (en) * | 1958-07-11 | 1960-10-11 | Nyrop Aage | Centrifugal separator |
US3085743A (en) * | 1954-02-11 | 1963-04-16 | Westphalia Separator Ag | Sludge discharging centrifugal separators |
-
0
- NL NL122277D patent/NL122277C/xx active
- NL NL278887D patent/NL278887A/xx unknown
-
1961
- 1961-06-13 DE DEW30161A patent/DE1145100B/de active Pending
-
1962
- 1962-06-12 US US20192262 patent/US3167509A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB461739A (en) * | 1935-05-23 | 1937-02-23 | Harold William Fawcett | Improvements in or relating to centrifugal separators |
GB483438A (en) * | 1936-07-18 | 1938-04-20 | Separator Ab | An installation comprising self-opening separators for the separation of sludge containing liquids |
US2227837A (en) * | 1937-03-05 | 1941-01-07 | Laval Separator Co De | Dairy installation for separation and purification of milk |
US2344888A (en) * | 1940-10-05 | 1944-03-21 | Laval Separator Co De | Centrifugal separator |
US2378778A (en) * | 1940-12-06 | 1945-06-19 | Laval Separator Co De | Centrifugal separator bowl |
US3085743A (en) * | 1954-02-11 | 1963-04-16 | Westphalia Separator Ag | Sludge discharging centrifugal separators |
GB813014A (en) * | 1956-02-18 | 1959-05-06 | Separator Ab | Improvements in or relating to centrifugal separators |
US2955754A (en) * | 1958-07-11 | 1960-10-11 | Nyrop Aage | Centrifugal separator |
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3239137A (en) * | 1962-07-19 | 1966-03-08 | Separator Ab | Method of discharging sludge from self-opening centrifuges |
US3261546A (en) * | 1962-10-29 | 1966-07-19 | Pfaudler Permutit Inc | Method for clarifying fats and oils |
US3255958A (en) * | 1962-12-04 | 1966-06-14 | Westfalia Separator Ag | Centrifugal desludging separator |
US3301476A (en) * | 1963-01-26 | 1967-01-31 | Westfalia Separator Ag | Apparatus for signaling a predetermined level in the sludge chamber of a centrifugaldrum |
US3454216A (en) * | 1963-01-26 | 1969-07-08 | Westfalia Separator Ag | Sludge separator with automatic control |
US3448919A (en) * | 1963-01-26 | 1969-06-10 | Westfalia Separator Ag | Automatic desludging apparatus |
US3360194A (en) * | 1965-01-25 | 1967-12-26 | Westfalia Separator Ag | Apparatus and method for automatic overload protection in centrifuge equipment |
US3396910A (en) * | 1965-08-17 | 1968-08-13 | Westfalia Separator Ag | Method and apparatus for sensing the fullness of the mud chamber in a centrifugal separator |
US3441204A (en) * | 1965-08-27 | 1969-04-29 | Alfa Laval Ab | Device for indicating sludge level in sludge centrifuges |
US3409214A (en) * | 1965-10-26 | 1968-11-05 | Alfa Laval Ab | Device for indicating the sludge level in sludge centrifuges |
US3460750A (en) * | 1966-04-21 | 1969-08-12 | Cuccolini Silla | Centrifugal separator |
US3462076A (en) * | 1966-11-04 | 1969-08-19 | Westfalia Separator Ag | Self-cleaning centrifugal separator drum having an external piston valve |
US3407999A (en) * | 1966-11-10 | 1968-10-29 | Pennsalt Chemicals Corp | Sludge discharge means for a centrifuge |
US3570754A (en) * | 1966-11-10 | 1971-03-16 | Pennwalt Corp | Centrifuge apparatus |
US3445061A (en) * | 1966-11-14 | 1969-05-20 | Alfa Laval Ab | Apparatus for indicating sludge level in centrifuges |
US3508704A (en) * | 1967-02-08 | 1970-04-28 | Westfalia Separator Ag | Centrifugal separator control |
US3415446A (en) * | 1967-04-11 | 1968-12-10 | Carl W. Weiland | Hydraulically actuated valve plate for a centrifuge |
US3416726A (en) * | 1967-05-04 | 1968-12-17 | Dorr Oliver Inc | Bearing mounted overflow impeller |
US3494544A (en) * | 1967-05-10 | 1970-02-10 | Alfa Laval Ab | Centrifugal separator |
US3563453A (en) * | 1968-02-23 | 1971-02-16 | Alfa Laval Ab | Method and apparatus for indicating sludge level in sludge centrifuge |
US3623657A (en) * | 1968-07-08 | 1971-11-30 | Pennwalt Corp | Centrifuge apparatus |
US3593915A (en) * | 1968-09-25 | 1971-07-20 | Westphalia Separator Ag | Controlled desludging of centrifugal separators |
US3595470A (en) * | 1968-10-28 | 1971-07-27 | Pennwalt Corp | Control apparatus for centrifuge |
US3637134A (en) * | 1970-01-21 | 1972-01-25 | Laval Separator Co De | Apparatus for indicating the sludge level in centrifuges |
US3761014A (en) * | 1971-05-12 | 1973-09-25 | Mse Holdings Ltd | Centrifuging apparatus |
US3976242A (en) * | 1974-07-27 | 1976-08-24 | Westfalia Separator Aktiengesellschaft | Self-emptying clarifying separator having a foam-free removal of the clarified liquid by means of a paring disk and an automatically operating system for detecting the level of the solids in the sludge chamber |
US4044944A (en) * | 1975-04-24 | 1977-08-30 | Fa. Moebus Kg. | Centrifuge |
FR2477905A1 (fr) * | 1980-03-13 | 1981-09-18 | Kloeckner Humboldt Deutz Ag | Centrifugeuse a bol plein a vidage automatique |
US4401429A (en) * | 1980-03-13 | 1983-08-30 | Klockner-Humboldt-Deutz Ag | Self-emptying solid bowl centrifuge |
US4643708A (en) * | 1984-09-06 | 1987-02-17 | Alfa-Laval Separation Ab | Centrifuge operating system |
US4820256A (en) * | 1985-06-07 | 1989-04-11 | Alfa-Laval Separation Ab | Centrifugal separator |
US4718886A (en) * | 1986-02-05 | 1988-01-12 | Westfalia Separator Ag | Continuous-operation centrifuge bowl for concentrating suspended solids |
US4718887A (en) * | 1986-02-12 | 1988-01-12 | Westfalia Separator Ag | Centrifugal separator with a vertical axis and a skimmer |
US4929227A (en) * | 1987-10-16 | 1990-05-29 | Westfalia Separator Ag | Centrifuge drum for separating mixtures of liquids |
US5160609A (en) * | 1989-03-31 | 1992-11-03 | Herberg Jan W V D | Centrifugal separator with discharge of separated constituents by braking moment |
WO1996003214A1 (fr) * | 1994-07-22 | 1996-02-08 | Tetra Laval Holdings & Finance S.A. | Procede et equipement pour la surveillance d'un separateur centrifuge |
US5800330A (en) * | 1994-07-22 | 1998-09-01 | Alfa Laval Ab | Method and equipment for monitoring a centrifugal separator |
CN1063107C (zh) * | 1994-07-22 | 2001-03-14 | 阿尔法拉瓦尔有限公司 | 监测离心分离器的设备和方法 |
US6358193B1 (en) * | 1997-09-29 | 2002-03-19 | Alfa Laval Ab | Regulation device for a centrifugal separator to control discharge from outlets |
US6837842B1 (en) * | 1999-03-08 | 2005-01-04 | Alfa Laval Ab | Method and device for indicating an undesired operation condition of a centrifugal separator |
US6390964B1 (en) * | 1999-05-14 | 2002-05-21 | Westfalia Separator Ag | Device for cooling a centrifugal device and method for centrifuge operation |
US20050143245A1 (en) * | 2002-05-08 | 2005-06-30 | Werner Kohlstette | Centrifuge especially a separator |
US7074173B2 (en) * | 2002-05-08 | 2006-07-11 | Westfalia Separator Ag | Centrifuge having a centrifugal drum and a groove including a seal |
US20130065744A1 (en) * | 2010-03-19 | 2013-03-14 | Per Karlsson | Device and method for monitoring and adjusting the radial position of an interface layer in a nozzle centrifuge |
US8702576B2 (en) * | 2010-03-19 | 2014-04-22 | Alfa Laval Corporate Ab | Device and method for monitoring and adjusting the radial position of an interface layer in a nozzle centrifuge |
EP3885050B1 (fr) | 2020-03-26 | 2022-10-05 | Alfa Laval Corporate AB | Séparateur centrifuge pour la séparation d'un mélange liquide |
Also Published As
Publication number | Publication date |
---|---|
DE1145100B (de) | 1963-03-07 |
NL278887A (fr) | |
NL122277C (fr) |
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