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EP0177838A2 - Dispositif d'introduction de floculants dans des boues à l'intérieur de la chambre de chargement d'une centrifugeuse - Google Patents

Dispositif d'introduction de floculants dans des boues à l'intérieur de la chambre de chargement d'une centrifugeuse Download PDF

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Publication number
EP0177838A2
EP0177838A2 EP85112142A EP85112142A EP0177838A2 EP 0177838 A2 EP0177838 A2 EP 0177838A2 EP 85112142 A EP85112142 A EP 85112142A EP 85112142 A EP85112142 A EP 85112142A EP 0177838 A2 EP0177838 A2 EP 0177838A2
Authority
EP
European Patent Office
Prior art keywords
sludge
flocculant
inlet chamber
centrifuge
feed tube
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.)
Granted
Application number
EP85112142A
Other languages
German (de)
English (en)
Other versions
EP0177838A3 (en
EP0177838B1 (fr
Inventor
Stephan Cläsgens
Heinz Kulle
Reinhold Dr. Schilp
Wolfgang Epper
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0177838A2 publication Critical patent/EP0177838A2/fr
Publication of EP0177838A3 publication Critical patent/EP0177838A3/de
Application granted granted Critical
Publication of EP0177838B1 publication Critical patent/EP0177838B1/fr
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
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • 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

Definitions

  • the invention relates to a device for introducing flocculants into the sludge inside the inlet chamber of a centrifuge, consisting of a flocculant feed pipe which is passed through the sludge feed pipe and projects into the inlet chamber of the centrifuge provided with sludge through openings.
  • the object of the invention is therefore to provide a device for introducing flocculants into the sludge inside the inlet chamber of a centrifuge, which enables the flocculant to be optimally mixed with the sludge while using as little flocculant as possible.
  • the object is achieved in that the flocculant supply pipe is axially adjustable and / or rotatably held in the sludge supply pipe.
  • the flocculant jet emerging from the nozzle-shaped outlet opening of the flocculant supply pipe can be directed or adjusted precisely to the sludge flow located in the peripheral area of the inlet chamber , in which an optimal mixing of sludge and flocculant takes place. As practical tests have shown, this area lies between the baffle of the inlet chamber and the sludge through openings in the Inlet chamber, where the sludge flow runs in the axial direction.
  • the flocculant addition can be reduced to the minimum required in each case, which in comparison to the previously known flocculant supply devices saves flocculants in some cases up to over 50 % is achieved.
  • the flocculant feed tube consists of several parts which are arranged to be pluggable or telescopically displaceable.
  • the flocculant feed tube consists of a flexible or elastic material, in particular rubber.
  • a flocculant feed pipe is particularly characterized by the easy handling during installation and removal and by the self-sealing at the through opening in the sludge feed pipe.
  • the centrifuge consists of a centrifuge drum 1, in which a screw conveyor 2 is arranged coaxially, the shaft of which is designed as a hollow shaft 3 and is externally surrounded by the spiral screw 4.
  • the hollow shaft 3 is closed by an end wall 5, which is provided in the central area with an opening 6 through which a stationary arranged sludge feed pipe 7 is passed.
  • a baffle 8 with baffle cone 9 is installed in the hollow shaft 3 at a distance from the end wall 5, which together with the end wall 5 and the hollow shaft 3 forms an inlet chamber 10 for the sludge.
  • Provided in the hollow shaft 3 in the area of this inlet chamber 10 are a plurality of openings 11 evenly distributed over the circumference for the sludge to pass into the centrifuge drum 1.
  • a flocculant feed pipe 12 is guided through the sludge feed pipe 7, which opens into the inlet chamber 10 and is provided in the end region with a nozzle-shaped outlet opening 13.
  • This Flocculant feed pipe 12 is held in the sludge feed pipe 7 according to the invention both axially adjustable and rotatable.
  • a tubular extension piece 14 with a locking screw 15 arranged at the outer end of the sludge feed pipe 7 serves as a holder. By loosening the adjusting screw 15, the flocculant feed pipe 12 can be moved both in the axial direction and rotated about the axis.
  • the flocculant supply pipe 12 with the nozzle-shaped outlet opening 13 can be adjusted very advantageously in such a way that the flocculant jet 16 emerging from the nozzle-shaped outlet opening 13 under pressure strikes the rotating sludge layer located in the peripheral area within the sludge inlet chamber 10 and at least partially penetrates, with an intimate mixing of sludge and flocculant.
  • this area lies between the baffle 8 and the sludge passage openings 11, specifically at the point where the sludge in the peripheral region of the inlet chamber 10 is away from the baffle wall 8, approximately in the axial direction towards the sludge passage openings 11 emotional.
  • the amount of flocculant supplied to the sludge in the inlet chamber 10 under pressure of, for example, about 0.5 to 10 bar via the line 12 can be optimally adjusted in this way, that is to say can be adjusted to the amount of flocculant that is necessary to all in the Detect and flocculate existing solid particles. In this way, the flocculant consumption can be reduced considerably in comparison to the previously known devices and the separation effect can be significantly improved.
  • the flocculant supply pipe 12 can consist of several parts 17 which are arranged to be pluggable or telescopically displaceable.
  • the flocculant feed pipe 12 can also be attached in the sludge feed pipe 7 centrally, laterally at the top in the axial direction, or also at an angle to it.
  • the flocculant feed pipe 12 can optionally also be introduced into the inlet chamber 10 outside the sludge feed pipe 12.
  • the flocculant supply pipe 12 according to the invention can also be very advantageously provided with a plurality of nozzle-shaped outlet openings.

Landscapes

  • Centrifugal Separators (AREA)
EP85112142A 1984-10-10 1985-09-25 Dispositif d'introduction de floculants dans des boues à l'intérieur de la chambre de chargement d'une centrifugeuse Expired - Lifetime EP0177838B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3437157 1984-10-10
DE3437157 1984-10-10
DE19843444349 DE3444349A1 (de) 1984-10-10 1984-12-05 Vorrichtung zum einbringen von flockungsmitteln in den schlamm innerhalb der einlaufkammer einer zentrifuge
DE3444349 1984-12-05

Publications (3)

Publication Number Publication Date
EP0177838A2 true EP0177838A2 (fr) 1986-04-16
EP0177838A3 EP0177838A3 (en) 1987-10-28
EP0177838B1 EP0177838B1 (fr) 1990-05-09

Family

ID=25825520

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112142A Expired - Lifetime EP0177838B1 (fr) 1984-10-10 1985-09-25 Dispositif d'introduction de floculants dans des boues à l'intérieur de la chambre de chargement d'une centrifugeuse

Country Status (3)

Country Link
EP (1) EP0177838B1 (fr)
DE (2) DE3444349A1 (fr)
FI (1) FI853805L (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013686A1 (fr) * 1990-03-13 1991-09-19 Alfa-Laval Separation A/S Separateur centrifuge
US5374234A (en) * 1990-03-13 1994-12-20 Alfa-Laval Separation A/S Decanter centrifuge with energy dissipating inlet
US6561965B1 (en) 2000-10-20 2003-05-13 Alfa Laval Inc. Mist pump for a decanter centrifuge feed chamber
CN110550712A (zh) * 2019-08-27 2019-12-10 黄翠玲 一种污水处理絮凝剂快速混合设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004057861A1 (de) * 2004-11-30 2006-06-01 Siebtechnik Gmbh Einlaufrohr einer Zentrifuge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101301B (de) * 1957-08-23 1961-03-02 Krauss Maffei Ag Verfahren und Vorrichtung zum Eindicken von Schlamm, insbesondere Abwasserschlamm, der schwer sedimentierbare Bestandteile enthaelt, durch Zentrifugieren unter Verwendung eines Flockungsmittels
DE1215606B (de) * 1963-01-31 1966-04-28 Beteiligungs & Patentverw Gmbh Vorrichtung zum Vermischen von Flockungsmitteln mit Schlaemmen in Absetzzentrifugen
US3471081A (en) * 1967-12-21 1969-10-07 Ametek Inc Acid feed pipe
US4052303A (en) * 1972-12-11 1977-10-04 Krauss-Maffei Ag Method of operating a centrifugal filter and a filter centrifuge operating according to this method
DE2822533A1 (de) * 1977-05-24 1978-12-07 Broadbent & Sons Ltd Thomas Festkoerper-vollmanteldekantierzentrifuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101301B (de) * 1957-08-23 1961-03-02 Krauss Maffei Ag Verfahren und Vorrichtung zum Eindicken von Schlamm, insbesondere Abwasserschlamm, der schwer sedimentierbare Bestandteile enthaelt, durch Zentrifugieren unter Verwendung eines Flockungsmittels
DE1215606B (de) * 1963-01-31 1966-04-28 Beteiligungs & Patentverw Gmbh Vorrichtung zum Vermischen von Flockungsmitteln mit Schlaemmen in Absetzzentrifugen
US3471081A (en) * 1967-12-21 1969-10-07 Ametek Inc Acid feed pipe
US4052303A (en) * 1972-12-11 1977-10-04 Krauss-Maffei Ag Method of operating a centrifugal filter and a filter centrifuge operating according to this method
DE2822533A1 (de) * 1977-05-24 1978-12-07 Broadbent & Sons Ltd Thomas Festkoerper-vollmanteldekantierzentrifuge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991013686A1 (fr) * 1990-03-13 1991-09-19 Alfa-Laval Separation A/S Separateur centrifuge
US5374234A (en) * 1990-03-13 1994-12-20 Alfa-Laval Separation A/S Decanter centrifuge with energy dissipating inlet
US6561965B1 (en) 2000-10-20 2003-05-13 Alfa Laval Inc. Mist pump for a decanter centrifuge feed chamber
CN110550712A (zh) * 2019-08-27 2019-12-10 黄翠玲 一种污水处理絮凝剂快速混合设备

Also Published As

Publication number Publication date
EP0177838A3 (en) 1987-10-28
FI853805A0 (fi) 1985-10-02
DE3577515D1 (de) 1990-06-13
FI853805L (fi) 1986-04-11
DE3444349A1 (de) 1986-04-10
EP0177838B1 (fr) 1990-05-09

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