US3193194A - Centrifugal separator bowl with periodically operated sludge discharge means - Google Patents

Centrifugal separator bowl with periodically operated sludge discharge means Download PDF

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Publication number
US3193194A
US3193194A US205011A US20501162A US3193194A US 3193194 A US3193194 A US 3193194A US 205011 A US205011 A US 205011A US 20501162 A US20501162 A US 20501162A US 3193194 A US3193194 A US 3193194A
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US
United States
Prior art keywords
bowl
chamber
overflow
pressure fluid
closing
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
US205011A
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English (en)
Inventor
Steinacker Peter
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.)
GEA Mechanical Equipment GmbH
Original Assignee
Westfalia Separator GmbH
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 Westfalia Separator GmbH filed Critical Westfalia Separator GmbH
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    • 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
    • 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

Definitions

  • the present invention relates to centrifugal separators, and more particularly to the type of automatic, selfcleaning bowl 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. It is directed more specifically to improvements in separator bowls which have peripherally arranged sludge discharge port means and a pressure fluidoperated sliding piston which is slidable in the direction of the bowl axis under the control of a pressure fluid to open and close the discharge port means.
  • the speed with which the sliding piston moves between its opening position to its closing position depends not only on the pressure differential between the fluid in the opening and closing chambers of the cylinder but also on the pressure exerted upon the piston by the discharging contents of the bowl escaping through the port means.
  • the vertical component of the latter pressure adds to the opening pressure exerted upon the piston.
  • the radial distance of the overflow port from the axis of the bowl in the opening and closing chambers have been selected in reference to an average specific weight of the expected charges of the bowl.
  • the level of pressure fluid in the chambers depends on the radial position of the overflow ports.
  • the conventional bowls of this type assured most favorable sludge discharge operations only for one specific weight of the charge, particularly where it was desired to de-sludge only partially and leave residual sludge in the bowl.
  • the pressure differential between the cylinder chambers may be adjusted to the specific weight of the charge by a radially movable element which determines the level of the pressure fluid in one of the chambers, i.e. either the closing chamber or the opening chamber.
  • FIG. 1 is a vertical section of a separator bowl incorporating one embodiment of this invention
  • FIG. 2 is a similar vertical section showing the portion of the bowl incorporating another embodiment.
  • FIG. 3 is similar to FIG. 2 and shows a third embodiment.
  • the bowl consists of a bottom wall 1 and a conical upper wall 2, the peripheral cylindrical portion of the bottom wall being connected to the upper wall by sealing ring 3 which threadedly engages one or both walls.
  • a peripheral sludge space 2 is defined in the interior of the bowl by the upper wall 2 and a separating wall 5, a liquid charge distributor 4 being fixedly connected to the separating wall'S, and the liquid charge entering the bowl through inlet pipe 4.
  • An axially slidable, pressure fluid operated, annular piston 6 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 1 of the bowl.
  • the separator wall 5 has a first wall portion 5' which is generally parallel to the conical upper wall 2 of the bowl and, ascending therefrom, a second wall portion 5" extending towards upper bowl wall 2 but defining therewith an annular gap 71.
  • the cylindrical periphery of the bowl Wall 1 defines several ports 7 in alignment with gap 71.
  • the sliding skirt 5a is designed to open and close communication between the gap '71 and ports 7 upon axial movement of the piston 6, the gap and ports constituting a sludge discharge 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 3.
  • the bowl has a hub 12 fixedly mounted on a shaft constituting the axis of rotation of the bowl, the shaft being coupled to a source or power (not shown) for rotation at any desired speed required for centrifug ing a liquid charge placed into the bowl.
  • the bowl has suitable discharge means (not shown) for the liquid clarified in the bowl.
  • discharge means is well know per se and may take any suitable form. Since it forms no part of the present invention, it has not been shown.
  • Conventional conical disc means 16 is mounted concentrically about the bowl axis in the interior of the bowl, as is also conventional.
  • Pressure fluid such as water
  • main conduit 18, branch conduits 19 and 29 directing the pressure fluid into the opening and closing chambers, respectively.
  • the pressure fluid passing through conduit 18 is throttled down so that the pressure fluid is centrifugally forced through branch conduit 20 only, or primarily, into the closing chamber 8 while the amount of pressure fluid entering into opening chamber 11 through radially inwardly positioned branch conduit 19 is reduced to less than the amount passing out of it through outlet port means 26 in communication with bore 27 in the piston, or no pressure fluid at all enters conduit 19.
  • the amount of closing pressure depends on the amount of fluid in the closing chamber 8 and is adjustably controlled in accordance with the present invention.
  • a stationary fluid discharge pipe 10 extends radially into the overflow chamber 9 and constitutes a fluid removal element.
  • the paring pipe 10 is radially adjustably mounted in relation to the bowl axis so that the pipe intake lfla may be positioned at different radial distances from the axis, which will change the pressure fluid level in closing chamber 8 and thus the closing pressure on'the sliding piston in accordance with the specific weight of the charge. In this manner, the bowl may be readily adapted to charges of greatly varying specific weight without impairing the eificiency of the de-sluding cycle.
  • the separator bowl of FIG. 2 is the same as that of FIG. 1 and like reference numerals indicate like parts therein to avoid duplication of description.
  • the piston closing chamber 8 is connected with a fluid overflow chamber 28 through bore 2, the overflow chamber being formed by a radial bore in the bottom wall of the bowl.
  • Threadedly mounted in the overflow chamber is a plug 30 having a central bore in communication with the overflow pipe 31 extending radially into the overflow chamher 28.
  • a gasket 32 circumferentially mounted on the plug prevents leakage from the overflow chamber and when the plug is moved along threads 29 for radial adjustment of the overflow pipe, the amount of fluid land the corresponding pressure in closing chamber 8 is adjusted to any desired amount.
  • FIG. 3 which again generally shows the same separator bowl, like reference numerals being applied to like parts
  • the pressure differential between the opening and closing chambers are adjustable by regulating the pressure in the opening chamber 11
  • the opening chamber 11 is connected with an overflow chamber 34 through bore 33 which constitutes an overflow port for fluid in the opening chamber.
  • pipe 35 similar to pipe '10 of FIG. 1 extends radially into the overflow chamber and constitutes an element withdrawing fluid from the chamber and thus from opening chamber 11, the output of pipe 35 depending on the radial position of its intake 34a in relation to the bowl axis.
  • radially adjustably mounted in a suitable bracket so that its adjustment may readily adapt the bowl to charges of
  • the pipe is 4 varying specific weight without impairing the efficiency of the de-sludging cycle.
  • a separator bowl comprising in combination, an end wall, a bottom wall, a separating wall between the end and bottom walls, the separating wall forming a sludge space with the end wall and a pressure fluid cylinder with the bottom Wall, peripheral sludge discharge port means in said bowl adjacent said sludge space, a sliding piston mounted in said pressure fluid cylinder for axial reciprocation in relation to the discharge port means for opening and closing said port means, said piston separating said cylinder into two pressure fluid chambers, separate pressure fluid supply means leading into each of' said chambers for eflecting said axial reciprocation,
  • pressure fluid overflow means for one of said chambers for determining the fluid level therein, said overflow means comprising on overflow port, a housing adjacent the overflow, port and defining an overflow chamber, and a pressure fluid removal element radially adjustably mounted in said overflow chamber to receive pressure fluid from said overflow means for adjusting the fluid level in said one pres sure fluid chamber.

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  • Centrifugal Separators (AREA)
US205011A 1961-06-26 1962-06-25 Centrifugal separator bowl with periodically operated sludge discharge means Expired - Lifetime US3193194A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW30245A DE1157154B (de) 1961-06-26 1961-06-26 Schleudertrommel fuer eine Zentrifuge mit intermittierendem Schlammaustrag

Publications (1)

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US3193194A true US3193194A (en) 1965-07-06

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Application Number Title Priority Date Filing Date
US205011A Expired - Lifetime US3193194A (en) 1961-06-26 1962-06-25 Centrifugal separator bowl with periodically operated sludge discharge means

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US (1) US3193194A (xx)
DE (1) DE1157154B (xx)
GB (1) GB938324A (xx)
NL (1) NL278491A (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371859A (en) * 1965-07-14 1968-03-05 Lyskovtsov Ivan Vasilievich Drum of disc bowl centrifuge for separating liquid mixture
US3403849A (en) * 1965-12-15 1968-10-01 Alfa Laval Ab Sludge centrifuge with intermittent discharge
FR2212182A1 (xx) * 1972-12-27 1974-07-26 Westfalia Separator Ag
US4505698A (en) * 1983-03-10 1985-03-19 Westfalia Separator Self-emptying centrifuge drum
US5792037A (en) * 1995-06-08 1998-08-11 Alfa Laval Ab Centrifugal rotor and a slide for such a rotor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1084599A (en) * 1964-10-15 1967-09-27 Asahi Chemical Ind Process for the preparation of unsaturated aliphatic nitriles
SE356440B (xx) * 1971-10-04 1973-05-28 Alfa Laval Ab

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1158959A (en) * 1912-07-16 1915-11-02 Edward W Beach Centrifugal separator.
FR767977A (fr) * 1933-04-21 1934-07-27 Anciens Etablissements Cime Séparateur centrifuge
US2084484A (en) * 1935-11-22 1937-06-22 Standard Oil Dev Co Apparatus for discharging acid from a centrifuge
US2344888A (en) * 1940-10-05 1944-03-21 Laval Separator Co De Centrifugal separator
US2752089A (en) * 1952-10-21 1956-06-26 Separator Ab Apparatus for continuous centrifugal separation
DE1003650B (de) * 1953-08-29 1957-02-28 Separator Ab Steuereinrichtung fuer Trennschleudern mit intermittierender Schlammaustragung aus der Trommel
US2840302A (en) * 1954-06-01 1958-06-24 Westfalia Separator Ag Centrifugal separators
US2862659A (en) * 1956-05-31 1958-12-02 Nyrop Aage Centrifugal separator
US3085743A (en) * 1954-02-11 1963-04-16 Westphalia Separator Ag Sludge discharging centrifugal separators

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE582587C (de) * 1934-04-26 1933-08-17 Friedrich Kinscher Schleudertrommel mit durch Fluessigkeitsdruck bewegtem Abschlussmittel fuer die Schlammauslassoeffnungen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1158959A (en) * 1912-07-16 1915-11-02 Edward W Beach Centrifugal separator.
FR767977A (fr) * 1933-04-21 1934-07-27 Anciens Etablissements Cime Séparateur centrifuge
US2084484A (en) * 1935-11-22 1937-06-22 Standard Oil Dev Co Apparatus for discharging acid from a centrifuge
US2344888A (en) * 1940-10-05 1944-03-21 Laval Separator Co De Centrifugal separator
US2752089A (en) * 1952-10-21 1956-06-26 Separator Ab Apparatus for continuous centrifugal separation
DE1003650B (de) * 1953-08-29 1957-02-28 Separator Ab Steuereinrichtung fuer Trennschleudern mit intermittierender Schlammaustragung aus der Trommel
US3085743A (en) * 1954-02-11 1963-04-16 Westphalia Separator Ag Sludge discharging centrifugal separators
US2840302A (en) * 1954-06-01 1958-06-24 Westfalia Separator Ag Centrifugal separators
US2862659A (en) * 1956-05-31 1958-12-02 Nyrop Aage Centrifugal separator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371859A (en) * 1965-07-14 1968-03-05 Lyskovtsov Ivan Vasilievich Drum of disc bowl centrifuge for separating liquid mixture
US3403849A (en) * 1965-12-15 1968-10-01 Alfa Laval Ab Sludge centrifuge with intermittent discharge
FR2212182A1 (xx) * 1972-12-27 1974-07-26 Westfalia Separator Ag
US4505698A (en) * 1983-03-10 1985-03-19 Westfalia Separator Self-emptying centrifuge drum
US5792037A (en) * 1995-06-08 1998-08-11 Alfa Laval Ab Centrifugal rotor and a slide for such a rotor

Also Published As

Publication number Publication date
GB938324A (en) 1963-10-02
DE1157154B (de) 1963-11-07
NL278491A (xx)

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