WO1998038389A1 - Grille de filtrage - Google Patents

Grille de filtrage Download PDF

Info

Publication number
WO1998038389A1
WO1998038389A1 PCT/EP1998/001067 EP9801067W WO9838389A1 WO 1998038389 A1 WO1998038389 A1 WO 1998038389A1 EP 9801067 W EP9801067 W EP 9801067W WO 9838389 A1 WO9838389 A1 WO 9838389A1
Authority
WO
WIPO (PCT)
Prior art keywords
sieve
belt
screen
section
perforated plate
Prior art date
Application number
PCT/EP1998/001067
Other languages
German (de)
English (en)
Inventor
Jürgen HOHL
Original Assignee
Andritz-Patentverwaltungs-Gesellschaft M.B.H.
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 Andritz-Patentverwaltungs-Gesellschaft M.B.H. filed Critical Andritz-Patentverwaltungs-Gesellschaft M.B.H.
Priority to CA002282445A priority Critical patent/CA2282445A1/fr
Priority to EP98913589A priority patent/EP0966570A1/fr
Priority to PL98335352A priority patent/PL335352A1/xx
Priority to AU68234/98A priority patent/AU6823498A/en
Publication of WO1998038389A1 publication Critical patent/WO1998038389A1/fr
Priority to NO994217A priority patent/NO994217L/no

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
    • E02B8/023—Arresting devices for waterborne materials
    • E02B8/026—Cleaning devices

Definitions

  • the invention relates to a method for discharging solids from a wastewater stream, with a drivable belt that can be inserted into the wastewater stream. Furthermore, it relates to a sieve screen for the discharge of solids from a wastewater flow, with a drivable sieve belt which can be inserted into the wastewater flow and which has two side link chains, between which sieve elements consisting of perforated plates extend.
  • Waste water must be cleaned mechanically, especially before treatment in sewage treatment plants, of entrained solids that exceed a predetermined particle size.
  • the solids must be removed at regular intervals or continuously in order to prevent the screen from clogging.
  • Sieve screens or filter screens of various types are known for this purpose. Most of these sieve screens have a driven sieve belt that runs endlessly in the manner of a paternoster and consists of individual sieve elements which, with their gaps, form the sieve surface through which the wastewater stream flows.
  • sieve sieves of the type mentioned at the outset are known, in which the sieve elements are each formed by a flat perforated plate.
  • This screen with perforated plates have the advantage of a relatively simple structure, so that they are relatively inexpensive to manufacture. Even in the event of damage to the sieve elements, replacement is necessary
  • Perforated sheets are relatively easy to carry out, and the procurement of spare parts is also easy because the perforated sheets can be produced in a simple manner and at low cost and because the link chains on both sides remain installed when individual perforated sheets are replaced. In these known screen screens with perforated plates, only the circulating movement of the screen belt can be controlled.
  • the canal is flushed due to the high flow speed of the water.
  • the sieve belt is quickly filled and due to the water level difference occurring, its control switches to continuous operation and, under certain circumstances, also to a higher circulation speed. After the rinse pulse has ended, only a little material remains, but the amount of water remains unchanged for a long time. For security reasons, the sieve belt continues to run continuously. Due to the flow conditions, fine material is flushed through the screen belt and therefore not discharged.
  • the object of the invention is therefore to achieve a better discharge of dirt and to form a sieve break of the type mentioned at the outset so that this is achieved.
  • This object is achieved in that the passage cross section of the sieve elements of the sieve belt is regulated or is controlled, the flow conditions are detected by a sensor and the passage cross-section can be regulated depending on the height difference of the water level in front of and behind the sieve. In this way, the sieving effect can be influenced in such a way that an optimal discharge rate is achieved under all operating conditions.
  • each sieve element consists of two superimposed perforated plates which are displaceable relative to one another, and that one of the two sieve plates is designed as a movable perforated plate and is engaged with an adjusting drive at least at one point in the orbit of the sieve belt.
  • the passage cross-section of the bore of the sieve elements is changed by the relative adjustment of the two sieve plates lying on top of each other, which each form a sieve element.
  • a further control option with regard to the screen effect is created, as a result of which an optimal adaptation to the prevailing conditions can be achieved.
  • the gap width (hole size) of the sieve elements By changing the gap width (hole size) of the sieve elements, more material is discharged in the operating state with a small amount of water, the difference in water level due to the reduction in the gap width leading to the drive of the sieve belt being switched on again.
  • the screen belt discharges more material with a reduced gap width.
  • the gap width is only increased as required for the respective operating state. As a result, optimum sieving performance is achieved even with a high water inflow.
  • the improved discharge performance enables better reaction to unforeseen weather events and further reduces waste Risk of blockage for downstream pumps and lines.
  • the running times of the sieve belt can be optimized so that washed-up screenings also act as a fine sieve and also retain fine dirt. This makes it possible to wash out larger quantities of organic substances in a subsequent washing process and to feed them into a clarification process.
  • FIG. 1 is a partial plan view of a screen belt of a screen for discharging solids from a waste water stream
  • Fig. 3 is an enlarged partial section through the screen belt in the forward and reverse and
  • FIG. 4 is a partial top view in the direction of arrow IV in FIG. 3.
  • a rotating, drivable sieve belt 1 has two lateral link chains 2, between which sieve elements extend, which are designed as double-layer perforated plates 3a, 3b.
  • One of the two perforated plates 3a lying on top of each other is connected, for example screwed, at its two ends to a support bracket 4, which is connected to a link 2a of the link chain 2.
  • Each support bracket 4 has a stop plate 5 which bears against the underside of the perforated plate 3 and extends almost over its entire width.
  • a joint bridge profile 6 is inserted, which in the illustrated embodiment consists of two profile strips 7, each of which is formed from a deformed sheet metal strip.
  • the two profile strips 7 are connected to one another by screws 8 arranged at a distance from one another. As shown in FIG.
  • each screw 8 is connected at one end to the lower profile strip 7, for example welded, and projects with its other end through a bore in the upper profile strip 7 and carries a secured cap nut 9.
  • a cap nut received on the screw 8 , spacer sleeve 10 arranged between the two profile strips forms a spacer between the two profile strips 7.
  • a retaining groove 11 is formed on the joint bridge profile 6, each holding one of the two longitudinal edges 3c in a movable and pivotable manner.
  • Each of the two retaining grooves 11 of the joint bridge profile 6 has a groove opening delimited by two groove lips 12, the clear width of which is greater than the thickness of the perforated plates 3. It can also be seen that the holding groove 11 widens towards the groove base.
  • the inner surfaces of the groove lips 12 facing the perforated plates 3 are convexly curved in cross section. This enables a pivoting movement of the two perforated plates 3 relative to one another in the region of the deflection of the screen belt.
  • the movable inclusion of the longitudinal edges 3 c in the holding grooves 11 enables the two perforated plates 31, 3 b to be displaced relative to one another.
  • each sieve element 3 consists of two sieve plates 3a and 3b, one perforated plate 3b being connected to the link chain 2 as a fixed perforated plate.
  • the movable perforated plate 3a lying thereon carries at one end an angle 13, the outwardly projecting arm 13a of which is provided with a guide fork 14.
  • the guide fork 14 is guided on a guide rail 15 so that the movable perforated plate 3a is held in its predetermined relative position to the fixed perforated plate 3b during the circulation of the screen belt, for example in a position in which the holes 16 of the movable perforated plate 3a with the holes 17th of the fixed perforated plate 3b are covered.
  • the screen elements 3 In this state, shown in FIG. 3, the screen elements 3 have their largest possible gap width.
  • the guide fork 14 comes into engagement with an adjustment section 15a of the guide rail 15 which is adjustable transversely to the running direction of the sieve belt.
  • the adjustment section 15a is connected via a push rod 18 to an adjusting drive 19, for example a pressure-operated cylinder, which is connected to a control device 20 which is only shown schematically.
  • the control device 20 can be connected to a sensor 21 which detects the respective flow conditions, for example a device for measuring the water level in front of and behind the screen.
  • the two perforated sheets 3a and 3b are held together at their two longitudinal edges by the joint bridge profile 6.
  • profile pieces 23 are inserted into the elongated holes 22 of the two perforated plates 3a and 3b, which overlap the edges of the elongated holes 22 with their two widened heads and hold the two perforated plates 3a, 3b together.
  • a change in the gap width of the sieve elements is carried out via the adjusting drive 19 by relative displacement of the two perforated plates 3a, 3b, and the sieve effect is thereby influenced in such a way that optimum discharge performance is achieved under all operating conditions that occur.
  • the sieve belt 1 is first switched in continuous operation and possibly also switched to a higher speed. Only when this measure is insufficient with a narrow gap width due to a large water inlet, is the gap width increased by actuating the adjusting device 19.
  • the very high water level keeps the filter belt in continuous operation for safety reasons. Only a little fine material is washed up. In order to prevent this material from flowing unhindered through the sieve rake, the gap width is reduced so that the fine material is better discharged when the water level initially drops.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

L'invention concerne un procédé pour vidanger les matières solides d'un courant d'effluents au moyen d'un tamis à bande. Elle se caractérise principalement par le fait que la section de passage des éléments de tamisage est réglée ou commandée. Par ailleurs, l'invention concerne une grille de filtrage pour la mise en oeuvre du procédé. Cette grille comprend deux chaînes (2) latérales, entre lesquelles s'échelonnent les éléments de tamisage constitués de tôle perforée (3). La grille de filtrage a ceci de caractéristique que chaque élément de filtrage (3) est constitué de deux tôles perforées (3a, 3b) superposées et déplaçables l'une par rapport à l'autre.
PCT/EP1998/001067 1997-03-01 1998-02-25 Grille de filtrage WO1998038389A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002282445A CA2282445A1 (fr) 1997-03-01 1998-02-25 Grille de filtrage
EP98913589A EP0966570A1 (fr) 1997-03-01 1998-02-25 Grille de filtrage
PL98335352A PL335352A1 (en) 1997-03-01 1998-02-25 Filter grate
AU68234/98A AU6823498A (en) 1997-03-01 1998-02-25 Strainer insert
NO994217A NO994217L (no) 1997-03-01 1999-08-31 Silgitter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29703713.7 1997-03-01
DE29703713U DE29703713U1 (de) 1997-03-01 1997-03-01 Siebrechen

Publications (1)

Publication Number Publication Date
WO1998038389A1 true WO1998038389A1 (fr) 1998-09-03

Family

ID=8036783

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/001067 WO1998038389A1 (fr) 1997-03-01 1998-02-25 Grille de filtrage

Country Status (9)

Country Link
EP (1) EP0966570A1 (fr)
AR (1) AR011893A1 (fr)
AU (1) AU6823498A (fr)
CA (1) CA2282445A1 (fr)
DE (1) DE29703713U1 (fr)
NO (1) NO994217L (fr)
PL (1) PL335352A1 (fr)
TW (1) TW350893B (fr)
WO (1) WO1998038389A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405744B (de) * 1997-11-05 1999-11-25 Andritz Patentverwaltung Siebrechen
CN106087876B (zh) * 2016-08-08 2023-06-02 辽宁省水利水电科学研究院有限责任公司 一种混凝土接缝成槽用胶条组件

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6707428A (fr) * 1967-05-29 1968-12-02
WO1992018221A1 (fr) 1991-04-13 1992-10-29 Horst Bormet Rateau cribleur
EP0672800A2 (fr) * 1994-03-17 1995-09-20 ENVIREX Inc. Crible à barreaux ayant un tamis à mailles fines composées
DE29619891U1 (de) * 1996-11-15 1997-01-09 Raist Gunther Siebrechen
DE19533004A1 (de) * 1995-09-07 1997-03-13 Geiger Maschf Helmut Rechen zur Reinigung von strömendem Prozeß- und/oder Abwasser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6707428A (fr) * 1967-05-29 1968-12-02
WO1992018221A1 (fr) 1991-04-13 1992-10-29 Horst Bormet Rateau cribleur
EP0672800A2 (fr) * 1994-03-17 1995-09-20 ENVIREX Inc. Crible à barreaux ayant un tamis à mailles fines composées
DE19533004A1 (de) * 1995-09-07 1997-03-13 Geiger Maschf Helmut Rechen zur Reinigung von strömendem Prozeß- und/oder Abwasser
DE29619891U1 (de) * 1996-11-15 1997-01-09 Raist Gunther Siebrechen

Also Published As

Publication number Publication date
AR011893A1 (es) 2000-09-13
NO994217D0 (no) 1999-08-31
EP0966570A1 (fr) 1999-12-29
CA2282445A1 (fr) 1998-09-03
DE29703713U1 (de) 1997-07-03
TW350893B (en) 1999-01-21
NO994217L (no) 1999-08-31
PL335352A1 (en) 2000-04-25
AU6823498A (en) 1998-09-18

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