EP0177838B1 - 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
EP0177838B1
EP0177838B1 EP85112142A EP85112142A EP0177838B1 EP 0177838 B1 EP0177838 B1 EP 0177838B1 EP 85112142 A EP85112142 A EP 85112142A EP 85112142 A EP85112142 A EP 85112142A EP 0177838 B1 EP0177838 B1 EP 0177838B1
Authority
EP
European Patent Office
Prior art keywords
sludge
flocculant
feed tube
inlet chamber
centrifuge
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
EP85112142A
Other languages
German (de)
English (en)
Other versions
EP0177838A2 (fr
EP0177838A3 (en
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
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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, wherein in the inlet chamber at a distance from the mouth of the sludge feed pipe is arranged a baffle perpendicular to the mouth of the sludge feed pipe.
  • the object of the invention is therefore to provide a device for introducing flocculants into the sludge within 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 baffle is provided with a baffle cone centrally directed onto the mouth of the sludge feed pipe, and in that the flocculant feed pipe in the sludge feed pipe is axially adjustable and / or rotatably held so that its outlet opening onto the area is directed between the baffle and the sludge passage openings arranged at a distance therefrom in the inlet chamber.
  • baffle wall according to the invention is provided with a baffle cone centrally directed onto the mouth of the sludge feed pipe, an all-round uniform distribution of the sludge is very advantageously achieved in the inlet chamber, into which the flocculants can be introduced and mixed with it also equally .
  • the flocculant feed pipe in the sludge feed pipe is axially adjustable and / or rotatably held so that its outlet opening is directed to the area between the baffle and the sludge passage openings arranged at a distance therefrom in the inlet chamber very advantageously the flocculant jet emerging from the nozzle-shaped outlet opening of the flocculant feed pipe is directed or adjusted precisely to the sludge flow located in the peripheral region of the inlet chamber, in which the flocculant jet penetrates deeply into the sludge and thereby mixes intimately with the sludge.
  • this area lies between the baffle wall of the inlet chamber and the sludge passage openings in the chamber, specifically where the sludge flow undergoes a strong deflection in the opposite direction to the inlet direction.
  • the intimate mixing of the flocculant with the sludge that has already taken place in this area is intensified by the subsequent subsequent strong redirection and circulation of the sludge in the area of the passage openings.
  • the flocculant addition can very advantageously be reduced to the minimum required in each case, as a result of which, in comparison with the previously known flocculant supply devices, savings in flocculants can be achieved in some cases of up to over 50%.
  • the flocculant feed tube consists of several parts which are arranged to be pluggable or telescopically displaceable. This configuration of the flocculant feed tube makes it easy to remove and install the flocculant feed tube in a small space.
  • the flocculant supply pipe 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 screw spiral 4.
  • the hollow shaft 3 is closed by an end wall 5, which is provided in the central region 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 via line 12, for example under a pressure of approximately 0.5 to 10 bar, can be optimally adjusted in this way, i.e. be adjusted to the amount of flocculant that is necessary to capture and flocculate all solid particles present in the sludge. 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)

Claims (3)

1. Dispositif pour introduire des floculants dans la boue à l'intérieur de la chambre de chargement (10) d'une centrifugeuse, dispositif qui est composé d'un tube (12) d'amenée des floculants qui est enfilé dans le tube (7) d'amenée de la boue, et pénètre dans la chambre de chargement (10) de la centrifugeuse qui est munie d'ouvertures (11) de passage de la boue, cependant que, dans la chambre de chargement (10), est disposée, à distance du débouché du tube (7) d'amenée de la boue, une chicane (8) qui s'étend perpendiculairement au débouché du tube (7) d'amenée de la boue, caractérisé en ce que la chicane (8) est munie d'un cône d'impact (9) dirigé en position centrale vers le débouché du tube (7) d'amenée de la boue et en ce que le tube (12) d'amenée des floculants est monté mobile axialement et/ou mobile en rotation dans le tube (7) d'amenée de la boue de telle manière que son orifice de sortie (13) soit dirigé vers la région comprise entre la chicane (8) et les ouvertures (11) de passage de la boue de la chambre de chargement (10) qui sont disposées à distance de cette chicane.
2. Dispositif selon la revendication 1, caractérisé en ce que le tube (12) d'amenée des floculants est composé de plusieurs parties (17) qui sont agencées de façon à pouvoir s'assembler par emboîtement ou à pouvoir coulisser télescopi- quement les unes dans les autres.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le tube (12) d'amenée des floculants est fait d'une matière flexible ou élastique, en particulier de caoutchouc.
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
DE3444349 1984-12-05
DE19843444349 DE3444349A1 (de) 1984-10-10 1984-12-05 Vorrichtung zum einbringen von flockungsmitteln in den schlamm innerhalb der einlaufkammer einer zentrifuge

Publications (3)

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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5374234A (en) * 1990-03-13 1994-12-20 Alfa-Laval Separation A/S Decanter centrifuge with energy dissipating inlet
DK170967B1 (da) * 1990-03-13 1996-04-09 Alfa Laval Separation As Dekantercentrifuge
US6561965B1 (en) 2000-10-20 2003-05-13 Alfa Laval Inc. Mist pump for a decanter centrifuge feed chamber
DE102004057861A1 (de) * 2004-11-30 2006-06-01 Siebtechnik Gmbh Einlaufrohr einer Zentrifuge
CN110550712B (zh) * 2019-08-27 2022-03-22 济南林源环保工程有限公司 一种污水处理絮凝剂快速混合设备

Family Cites Families (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
DE2260461C3 (de) * 1972-12-11 1980-06-04 Krauss-Maffei Ag, 8000 Muenchen Filterzentrifuge
GB1602601A (en) * 1977-05-24 1981-11-11 Broadbent & Sons Ltd Thomas Solid bowl decanter centrifuges

Also Published As

Publication number Publication date
FI853805A0 (fi) 1985-10-02
DE3444349A1 (de) 1986-04-10
DE3577515D1 (de) 1990-06-13
EP0177838A2 (fr) 1986-04-16
FI853805L (fi) 1986-04-11
EP0177838A3 (en) 1987-10-28

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