US3448919A - Automatic desludging apparatus - Google Patents

Automatic desludging apparatus Download PDF

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Publication number
US3448919A
US3448919A US3448919DA US3448919A US 3448919 A US3448919 A US 3448919A US 3448919D A US3448919D A US 3448919DA US 3448919 A US3448919 A US 3448919A
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United States
Prior art keywords
chamber
feed
sludge
liquid
desludging
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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Inventor
Heinrich Hemfort
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 Westfalia Separator GmbH
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GEA Westfalia Separator GmbH
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Filing date
Publication date
Priority to DEW33789A priority Critical patent/DE1173030B/en
Priority to DEW39937A priority patent/DE1275959B/en
Priority to DE1966W0042193 priority patent/DE1298449B/en
Application filed by GEA Westfalia Separator GmbH filed Critical GEA Westfalia Separator GmbH
Application granted granted Critical
Publication of US3448919A publication Critical patent/US3448919A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B15/00Other accessories for centrifuges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B1/00Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10Centrifuges 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
    • B04B1/14Centrifuges 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B1/00Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/10Centrifuges 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
    • B04B1/14Centrifuges 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
    • B04B1/16Centrifuges 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
    • B04B1/18Centrifuges 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B11/00Feeding, charging, or discharging bowls
    • B04B11/04Periodical feeding or discharging; Control arrangements therefor
    • B04B11/043Load indication with or without control arrangements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
    • G01F23/14Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by measurement of pressure
    • G01F23/18Indicating, recording or alarm devices actuated electrically
    • G01F23/185Indicating, recording or alarm devices actuated electrically for discrete levels

Description

Sheet ATTORNEYS.

June 10, 1969 H. HEMFORT AUTOMATIC DESLUDGING APPARATUS Filed sept. 15, 196e 9 'Y Heim-mh Hem-fart.

H. HEM FORT AUTOMATIC DESLUDGING APPARATUS `lune 10,` .1969

sheet 2 @f2 Filed Sept. 13, 1966 FIG.

y INVENTOR: Heinrich Hem BY:

ATTORNEYS.

United States Patent O AUTOMATIC DESLUDGING APPARATUS Heinrich Hemfort, Oelde, Westphalia, Germany,'assignor to Westfalia Separator Aktiengesellschaft Oelde, Westphalia, Germany, a corporation of Germany Filed Sept. 13, 1966, Ser. No. 579,148 Claims priority, application Germany, Sept. 17, 1965, W 39,937 Int. Cl. B04b 11/08 U.S. Cl. 233- 4 Claims ABSTRACT OF THE DISCLOSURE Centrifuge adapted to resolve solid-liquid mixtures or multi-component liquid solid Imixtures having several liquid components of different specific gravities, which centrifuge has a chamber having a liquid and a solid outlet opening therein and an inlet opening thereto, which inlet opening is positioned along the bottom of the chamber and extends radially into the chamber such a distance as to be adapted to Ibe blocked by the accumulation of solids in the chamber. There is further provided axially disposed means for recirculating feed upon the blockage of said inlet opening and switching means activatable by the recirculating feed whereby to cause sludge discharge from the chamber.

This invention generally relates to the separation of materials `according to their specific gravities. lt more particularly refers to such separations'in which a solid or substantially solid sludge is formed during the separation, which sludge is intermittently or periodically removed frorn the separation apparatus.

The separation of materials according to their specific gravities is well known. Centrifugal separations of this type are widely practiced in industry. Solids are separa-ted from liquids by this technique. It is also possible to separate heavier liquids from lighter liquids by this technique. In many of these separations, a solid sludge is accumulated within the separator bowl, and various methods have been proposed by the art for removing this sludge from the system, preferably during centrifuge operation and without impairing this operation. For example, German Patent No. 1,173,030 describes a process whereby the automatic desludging of a centrifugal separator is accomplished through the use of the contents of the centrifuge as the means of determining when desludging is required. According to this patent, when one component of the material being separated reaches a predetermined depth, a signal is transmitted which initiates the desludging operation. This desludging usually is accomplished by means of a sliding piston which opens or closes orifices in the periphery of the centrifuge bowl. These orifices are opened or closed by manual or automatic operation, depending upon the sophistication of the process, in individually selected or predtermined intervals. In the process of the above-referred to German patent, the liquid level of the heavier component in the sludge chamber is used Ias the means for initiating sludge removal.

It is an object of this invention to profvide a novel apparatus in which an automatic desludging operation can be accomplished.

It is another object of this invention to provide a novel control means for initiating automatic desludging of the centrifugal separator.

Other and additional objects of this invention will become apparent from a consideration of this entire specification, including the claims and the drawings appended hereto.

ICC

In accord with the fulfilling these objects, this invention resides, in one of its aspects, in an apparatus for separating lighter from heavier components, wherein there are provided means whereby the feed material to such separator is caused to act upon a control means which initiates a desludging operation when the sludge level in the separator reaches a predetermined position.

This invention will be Ibetter understood by reference to the accompanying drawings, in which:

FIG. l is an elevational cross-section of a centrifugal separator adapted to resolve a mixture of one liquid and solids into their components; and

FIG. 2 is an elevational cross-section of a centrifugal separator adapted to resolve a mixture of at least two liquids and solids into their components.

Referring now to these drawings, and more particularly to FIG. 1 thereof, the material to be resolved flows from a supply reservoir 1 through a feed tube 2 into a central chamber 3, whereupon this material passes through passage 4 into a separating chamber 5, during which passage the material flows around the periphery of a bottom plate 6. During operation of the centrifuge, the chamber 5 becomes filled with solids, whereupon the opening 7 between the bottom plate 6 and the bottom of the chamber 5 becomes closed 0E to further introduction of feed material therethrough. As the opening 7 becomes closed, the liquid level in the central chamber 3 moves toward the axis of the centrifuge until the liquid level fully immerses the stationary skimming disk 8, whereupon the skimming disk 8 begins to pump the contents of chamber 3 into the feed tube 2 through the channel 9. This pumped liquid returns through opening 10 into chamber 3. This circulatory movement causes a back pressure to develop in the feed tube 2 and causes the incoming feed material to rise through the conduit 11 into contact with a fioat valve 12, which float valve bridges the terminals 13, thus causing the sludge removal operation to be initiated.

The peripheral portion of the bottom plate 6 can project into chamber 5 as far as the sludge level is desired to reach.

The skimming disk 8 prevents the chamber 3 from flooding. Air bleed holes 14 are provided in the skimming disk to prevent formation of air cushion in chamber 3 which would cause interference. Further, if desired, the orifice 10 in the feed tube 2 can be closed, thus relying upon the passage 9 to pass the feed material'into the chamber 3.

Referring now to FIG. 2, substantially the same feed procedure operation is provided as shown in FIG. 1. However, in FIG. 2, the device is specifically adapted to the resolution or clarification of liquid feed, composed of at least two liquids, and solids. Therein is provided a separation plate 15 and a second outlet 16 for the liquid having the greater specific weight. In this device, as the sludge builds up in the chamber 5, it closes channels 17 between the separating plate 15 and the centrifuge bowl cover, thereby prohibiting the heavier uid from discharging through the outlet 16. As the heavier liquid collects in the chamber 5, it rises to the level of the inner surface of the ascending passages 18 and effectively blocks the entry of the lighter fluid into the plate stack. When this occurs, the liquid level in the central chamber rises, and in the same manner as described with respect to FIG. 1, the float 12 is raised to bridge the terminals 13 and institute the desludging operation.

The desludging operation itself can be accomplished in any of the prior art manners such as by means 12 and 13 which either set a known kind of control equipment into operation or oper-ate directly a yvalve in a pressure line leading to the hydraulic system for opening and closing the centrifuge bowl.

What is claimed is:

1. In a centrifugal separating device adapted to resolve a mixture of components at different specic gravities, having an inlet opening for feeding material to be separated thereto, lat least one outlet opening for the removal of a liquid therefrom, peripheral means for removing an accumulated sludge therefrom; and a centrifugal chamber means; the improvement which comprises so positionng said inlet opening along the bottom of said separating chamber such that the build-up of sludge in said chamber will block said inlet opening and will prevent the introduction of feed material into said chamber, means for recirculating feed material upstream of said separation chamber, land switching means activatable t0 initiate desludging of said chamber by operation of said feed material on the switching means.

2. The improved apparatus as claimed in claim l, wherein said separating chamber has a second liquid outlet which is adapted to discharge a heavier liquid from said separating chamber, and wherein said second liquid outlet is adapted to be blocked by the accumulation of sludge in said chamber, which blockage is adapted to cause the activation of said switching means through a feed material.

3. The improved apparatus as claimed in claim 1, wherein said centrifuge has a skimmer disk in the feeding means in communication with said inlet opening and adapted to recirculate said feed material.

4. The improved apparatus `as claimed in claim 3, wherein said skimmer disk is located on an inlet pipe and in an inlet chamber in said centrifuge.

References Cited UNITED STATES PATENTS 3,167,509 1/ 1965 Steinacker 233-20 3,301,476 l/l967 Hemfort 233-20 3,360,194 12/1967 Wilsmann 233-20 HENRY T. KLINKSIEK, Primary Examiner.

U.S. Cl. X.R. 233-45

US3448919D 1963-01-26 1966-09-13 Automatic desludging apparatus Expired - Lifetime US3448919A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DEW33789A DE1173030B (en) 1963-01-26 1963-01-26 Method and apparatus for triggering a signal or a control pulse upon reaching a predetermined level by at least one accumulating in the sludge space of a centrifuge drum centrifuged component
DEW39937A DE1275959B (en) 1963-01-26 1965-09-17 Means for introducing the selbsttaetigen Entschlammungsvorganges at self-cleaning centrifuge drums
DE1966W0042193 DE1298449B (en) 1963-01-26 1966-08-11 Means for triggering a signal or a control pulse upon reaching a predetermined level by at least one accumulating in the sludge space of a centrifuge drum Schleudergutkomponente

Publications (1)

Publication Number Publication Date
US3448919A true US3448919A (en) 1969-06-10

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ID=27213440

Family Applications (3)

Application Number Title Priority Date Filing Date
US34048064 Expired - Lifetime US3301476A (en) 1963-01-26 1964-01-27 Apparatus for signaling a predetermined level in the sludge chamber of a centrifugaldrum
US3448919D Expired - Lifetime US3448919A (en) 1963-01-26 1966-09-13 Automatic desludging apparatus
US3454216D Expired - Lifetime US3454216A (en) 1963-01-26 1967-07-24 Sludge separator with automatic control

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US34048064 Expired - Lifetime US3301476A (en) 1963-01-26 1964-01-27 Apparatus for signaling a predetermined level in the sludge chamber of a centrifugaldrum

Family Applications After (1)

Application Number Title Priority Date Filing Date
US3454216D Expired - Lifetime US3454216A (en) 1963-01-26 1967-07-24 Sludge separator with automatic control

Country Status (8)

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US (3) US3301476A (en)
BE (1) BE685397A (en)
DE (2) DE1275959B (en)
DK (3) DK113418B (en)
FR (1) FR93091E (en)
GB (3) GB984738A (en)
NL (2) NL6611229A (en)
SE (1) SE337557B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286971A (en) * 1979-10-05 1981-09-01 Bethlehem Steel Corporation Removal of naphthalene from recirculated wash oil
EP0068034A1 (en) * 1981-06-26 1983-01-05 Bethlehem Steel Corporation Removal of naphthalene from recirculated wash oil
RU2577261C1 (en) * 2012-03-27 2016-03-10 Альфа Лаваль Корпорейт Аб Centrifugal separator and method of periodic release control
CN105413884A (en) * 2015-12-14 2016-03-23 宜兴市华鼎粮食机械有限公司 Disk centrifuge with tray

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL128415C (en) * 1963-01-26
US3360194A (en) * 1965-01-25 1967-12-26 Westfalia Separator Ag Apparatus and method for automatic overload protection in centrifuge equipment
DE1277757B (en) * 1965-08-17 1968-09-12 Westfalia Separator Ag Means for triggering a signal or a control pulse in dependence on the filling of the sludge space of a centrifugal drum in a centrifuge
US3410479A (en) * 1965-08-23 1968-11-12 Alfa Laval Ab Sludge level indicating device for centrifugal separators
US3408000A (en) * 1965-08-23 1968-10-29 Alfa Laval Ab Determination of sludge level in sludge centrifuge
US3409214A (en) * 1965-10-26 1968-11-05 Alfa Laval Ab Device for indicating the sludge level in sludge centrifuges
US3407999A (en) * 1966-11-10 1968-10-29 Pennsalt Chemicals Corp Sludge discharge means for a centrifuge
GB1139707A (en) * 1966-11-14 1969-01-15 Alfa Laval Ab Improvements in sludge centrifuges
DE1532767B2 (en) * 1967-02-08 1971-06-03 Means for triggering a signal or a control pulse upon reaching a predetermined level by at least one in the sludge space of a centrifuge drum accumulating schleudergutkomponente
US3415446A (en) * 1967-04-11 1968-12-10 Carl W. Weiland Hydraulically actuated valve plate for a centrifuge
SE321643B (en) * 1968-02-23 1970-03-09 Alfa Laval Ab
DE1782612B1 (en) * 1968-09-25 1971-05-19 Westphalia Separator Ag means for introducing the schammzentrifugen desludging in self-cleaning
US3637134A (en) * 1970-01-21 1972-01-25 Laval Separator Co De Apparatus for indicating the sludge level in centrifuges
SE345603B (en) * 1970-12-07 1972-06-05 Alfa Laval Ab
US3718278A (en) * 1971-01-22 1973-02-27 Laval Separator Co De Basket centrifuge with self-triggering sludge discharge
DE2436285C3 (en) * 1974-07-27 1981-03-12 Westfalia Separator Ag, 4740 Oelde, De
US3990632A (en) * 1975-02-06 1976-11-09 Westfalia Separator Ag Self-cleaning centrifugal separator with automatic control
SE436150B (en) * 1983-04-05 1984-11-12 Alfa Laval Ab Tetningsring for centrifugal
SE448429B (en) * 1985-07-05 1987-02-23 Alfa Laval Separation Ab Centrifugal separator with guide means for separating flat area
JPH07114982B2 (en) * 1988-06-07 1995-12-13 ヴェストファリア ゼパラトール アクチエンゲゼルシャフト centrifuge
US5695442A (en) * 1995-06-06 1997-12-09 Baker Hughes Incorporated Decanter centrifuge and associated method for producing cake with reduced moisture content and high throughput
US5643169A (en) * 1995-06-06 1997-07-01 Baker Hughes Incorporated Decanter centrifuge with adjustable gate control
US5653674A (en) * 1996-03-27 1997-08-05 Baker Hughes Incorporated Decanter centrifuge with discharge opening adjustment control and associated method of operating
SE513831C2 (en) * 1998-02-27 2000-11-13 Alfa Laval Ab centrifugal
DE102009059773A1 (en) * 2009-12-21 2011-06-22 Bayer Technology Services GmbH, 51373 Plant and process for the purification of marine diesel exhaust gases
DK2366457T3 (en) * 2010-03-19 2013-06-10 Alfa Laval Corp Ab Device and procedure for monitoring and adjusting a radial position of a interface layer in a centrifuge
CN103316783A (en) * 2013-06-21 2013-09-25 宿迁科思化学有限公司 Centrifuge nitrogen protection device

Citations (3)

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Publication number Priority date Publication date Assignee Title
US3167509A (en) * 1961-06-13 1965-01-26 Westfalia Separator Ag Centrifugal 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
US3360194A (en) * 1965-01-25 1967-12-26 Westfalia Separator Ag Apparatus and method for automatic overload protection in centrifuge equipment

Family Cites Families (2)

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NL58239C (en) * 1940-10-05
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167509A (en) * 1961-06-13 1965-01-26 Westfalia Separator Ag Centrifugal 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
US3360194A (en) * 1965-01-25 1967-12-26 Westfalia Separator Ag Apparatus and method for automatic overload protection in centrifuge equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286971A (en) * 1979-10-05 1981-09-01 Bethlehem Steel Corporation Removal of naphthalene from recirculated wash oil
EP0068034A1 (en) * 1981-06-26 1983-01-05 Bethlehem Steel Corporation Removal of naphthalene from recirculated wash oil
RU2577261C1 (en) * 2012-03-27 2016-03-10 Альфа Лаваль Корпорейт Аб Centrifugal separator and method of periodic release control
US10086384B2 (en) 2012-03-27 2018-10-02 Alfa Laval Corporate Ab Centrifugal separator and method of controlling intermittent discharge by monitoring flow through the separator
CN105413884A (en) * 2015-12-14 2016-03-23 宜兴市华鼎粮食机械有限公司 Disk centrifuge with tray

Also Published As

Publication number Publication date
DE1275959B (en) 1968-08-22
GB984738A (en) 1965-03-03
NL6611229A (en) 1967-03-20
US3301476A (en) 1967-01-31
NL128415C (en)
GB1199461A (en) 1970-07-22
US3454216A (en) 1969-07-08
DK118069B (en) 1970-06-29
SE337557B (en) 1971-08-09
GB1162121A (en) 1969-08-20
DK113418B (en) 1969-03-17
DE1298449B (en) 1969-06-26
BE685397A (en) 1967-01-16
FR93091E (en) 1969-02-07
DK123747B (en) 1972-07-31

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