US2590735A - Centrifugal bowl for separating sludge from liquids - Google Patents

Centrifugal bowl for separating sludge from liquids Download PDF

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Publication number
US2590735A
US2590735A US121965A US12196549A US2590735A US 2590735 A US2590735 A US 2590735A US 121965 A US121965 A US 121965A US 12196549 A US12196549 A US 12196549A US 2590735 A US2590735 A US 2590735A
Authority
US
United States
Prior art keywords
sludge
bowl
liquids
wall
outlet
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
US121965A
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English (en)
Inventor
Svensjo Nils Edvin
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 US2590735A publication Critical patent/US2590735A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • 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
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • 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
    • B04C5/081—Shapes or dimensions

Definitions

  • This invention relates to centrifugal separators for separating sludge from liquids, and more particularly to an improved centrifugal bowl for this purpose.
  • centrifugal bowls for separating sludgecontaining liquids the separated sludge passes through channels in the bowl or slides along the bowl wall in order to reach the sludge outlet or outlets.
  • Such bowls are usually exposed to considerable wear because of the wearing or grinding effect of the sludge as it slides along the inner surface of the bowl Wall. This wear can be kept within reasonable limits by employing special measures, as by applying to the surfaces exposed to wear a coating of some protecting material, such as rubber or a similar substance.
  • constructions of this type are generally very expensive.
  • the present invention has for its principal object the provision of a centrifugal bowl for separation of liquids containing sludge, in which the wear due to sliding of the separated sludge along the inner surface of the bowl wall in passing to the sludge outlet is greatly reduced or eliminated, without the necessity of providing a special protective lining,'or the like, for such surface.
  • a centrifugal bowl made according to the invention has a sludge outlet in the bowl wall and. also has an inner surface of the wall leading toward the outlet and along which the separated sludge moves in its travel to the outlet.
  • the bowl is characterized by a series of closely adjacent pockets formed in this inner surface which extend transversely to the direction of the sludge movement to the outlet and are arranged to receive separated sludge and retain it during the separating operation, so that the pockets are kept filled with sludge during the separation and thereby prevent wear of the underlying parts of the bowl surface.
  • the sludge-retaining pockets are formed by adjacent annular grooves in the inner surface of the bowl wall, which are concentric with the rotation axis of the bowl, so that the separated sludge passing to a plurality of circumferentially spaced sludge outlets in the bowl (or a single circumferentially extending outlet) will pass along the bowl surface but out of contact therewith by reason of the intervening stationary sludge retained by the grooves.
  • the grooves are preferably arranged in steps having an inclination less than the angle or repose of separated sludge in the bowl during the centrifuging, whereby the grooved wall remains entirely covered with a stationary sludge layer.
  • Fig. 1 is a vertical sectional view of part of a preferred form of the new centrifugal bowl
  • Fig. 2 is an enlarged horizontal sectional view of the bowl part illustrated in Fig. 1.
  • the wall l of the centrifugal bowl is provided internally with a series of annular grooves 2 concentric with the rotation axis of the bowl and formed, for example, by turning operations.
  • the grooves 2 form sludge-retaining pockets in an internal surface of the bowl leading toward sludge outlets in the bowl periphery and along which surface the separated sludge moves outward, in the direction indicated by arrow 3, in its travel to the sludge outlets, one of which is shown at 5.
  • the grooves are arranged in step form, and they serve to catch and retain separated sludge so that the grooves are kept filled with sludge by the action of centrifugal force during the centrifuging, the retained sludge thus forming a protective coating on the bowl wall.
  • the inclination of the flight of steps formed by grooves 2 should be such that the angle B in Fig. 1 is less than the angle of repose of the sludge, designated a. in Fig. 1, so that the grooved wall will, during separation, re-
  • grooves 2 need not be arranged stepwise along a straight line. The number as well as the depth and width of the grooves may also vary according to circumstances.
  • Each sludge outlet 5 is provided with a tangentially directed nozzle, consisting of an outer sleeve 6 screwed into the bowl wall I, a perforated disc or nozzle insert 1, and a tube 8. Between the sleeve 6 and the bowl wall I is a packing 9.
  • the tube 8, which should be made of a wear-resistant material, for example, glass, and should be easily replaceable, ends in the recess 4 where it extends freely in a direction toward the interior of the bowl. During separation, a deposit of sludge is formed in the recess 4 which protects the material of the wall I, and to some extent the inner end of sleeve 6, against wear. The channel in the sleeve 6 is protected from wear by the two linings I and 8.
  • a centrifugal bowl for separating sludge from a liquid, especially sludge having a strong wearing effect
  • the bowl having a sludge outlet in the bowl wall and also having an inner surface of said wall slanting outward from the bowl axis toward said outlet and along which the separated sludge moves outward in its travel to the outlet
  • the improvement which comprises a series of annular grooves in said inner surface, each groove forming a pocket extending around the bowl axis transversely to the direction of the sludge movement to said outlet, the grooves being arranged in step form and the steps forming a flight having an inclination to the vertical less than the angle of repose of the separated sludge in the bowl.
  • the bowl wall is formed with an internal recess adjacent said outlet, the outlet comprising a nozzle in the bowl wall and a lining of wearresistant material in the nozzle, the inner end of the lining terminating in said recess and pro jecting freely toward the interior of the bowl.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Centrifugal Separators (AREA)
  • Cyclones (AREA)
  • Reinforced Plastic Materials (AREA)
US121965A 1948-11-23 1949-10-18 Centrifugal bowl for separating sludge from liquids Expired - Lifetime US2590735A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE682451X 1948-11-23

Publications (1)

Publication Number Publication Date
US2590735A true US2590735A (en) 1952-03-25

Family

ID=20314951

Family Applications (1)

Application Number Title Priority Date Filing Date
US121965A Expired - Lifetime US2590735A (en) 1948-11-23 1949-10-18 Centrifugal bowl for separating sludge from liquids

Country Status (5)

Country Link
US (1) US2590735A (en)van)
DE (2) DE733893C (en)van)
FR (2) FR803056A (en)van)
GB (1) GB682451A (en)van)
NL (1) NL72802C (en)van)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695748A (en) * 1952-01-22 1954-11-30 Merco Centrifugal Co Centrifuge nozzle construction
US3075696A (en) * 1959-05-07 1963-01-29 Sharples Corp Centrifuge nozzle holders
US4608040A (en) * 1983-07-05 1986-08-26 Knelson Benjamin V Centrifugal separator
US20110028296A1 (en) * 2009-07-29 2011-02-03 Edwin John William Zonneveld Bowl structure for a centrifugal separator
US20190099763A1 (en) * 2016-03-24 2019-04-04 Fluid-Quip, Inc. Centrifuge rotor with staggered nozzles for use in a disc nozzle centrifuge

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120261B (de) * 1958-06-28 1961-12-21 Doerries A G O Schleuder zum Reinigen von Faserstoffaufschwemmungen
US3520473A (en) * 1968-06-10 1970-07-14 Lafayette E Gilreath Centrifugal separator with replaceable discharge outlet bushings
DE3103531C2 (de) * 1981-02-03 1982-10-21 Westfalia Separator Ag, 4740 Oelde Auslaßdüse für Zentrifugentrommeln

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT6803B (en)van) * 1899-06-03 1902-02-25 Wilh Bitter Fa
US881013A (en) * 1907-04-26 1908-03-03 Ray Hallie Manley Ore-concentrator.
US1894520A (en) * 1929-05-31 1933-01-17 Francisco A Quiroz Apparatus for separation
US1954676A (en) * 1931-08-28 1934-04-10 Centrifugal Engineering And Pa Skimming mechanism for centrifuges
DE605597C (de) * 1934-11-14 Separator Nobel Ab Schleudertrommel zur kontinuierlichen Zerlegung von Fluessigkeitsgemischen, insbesondere solchen, welche Kohlenwasserstoffoele, Saeureharz und Saeure enthalten
US2467742A (en) * 1943-07-13 1949-04-19 Laval Separator Co De Centrifugal bowl with reciprocating valve for separating sludgecontaining liquids

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE605597C (de) * 1934-11-14 Separator Nobel Ab Schleudertrommel zur kontinuierlichen Zerlegung von Fluessigkeitsgemischen, insbesondere solchen, welche Kohlenwasserstoffoele, Saeureharz und Saeure enthalten
AT6803B (en)van) * 1899-06-03 1902-02-25 Wilh Bitter Fa
US881013A (en) * 1907-04-26 1908-03-03 Ray Hallie Manley Ore-concentrator.
US1894520A (en) * 1929-05-31 1933-01-17 Francisco A Quiroz Apparatus for separation
US1954676A (en) * 1931-08-28 1934-04-10 Centrifugal Engineering And Pa Skimming mechanism for centrifuges
US2467742A (en) * 1943-07-13 1949-04-19 Laval Separator Co De Centrifugal bowl with reciprocating valve for separating sludgecontaining liquids

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695748A (en) * 1952-01-22 1954-11-30 Merco Centrifugal Co Centrifuge nozzle construction
US3075696A (en) * 1959-05-07 1963-01-29 Sharples Corp Centrifuge nozzle holders
US4608040A (en) * 1983-07-05 1986-08-26 Knelson Benjamin V Centrifugal separator
US20110028296A1 (en) * 2009-07-29 2011-02-03 Edwin John William Zonneveld Bowl structure for a centrifugal separator
US8808155B2 (en) * 2009-07-29 2014-08-19 Flsmidth Inc. Centrifuge bowl with liner material molded on a frame
US20190099763A1 (en) * 2016-03-24 2019-04-04 Fluid-Quip, Inc. Centrifuge rotor with staggered nozzles for use in a disc nozzle centrifuge

Also Published As

Publication number Publication date
FR999630A (fr) 1952-02-04
FR803056A (fr) 1936-09-22
NL72802C (en)van) 1953-02-16
DE829880C (de) 1952-01-31
DE733893C (de) 1943-04-05
GB682451A (en) 1952-11-12

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