EP0998341A1 - Procede et dispositif pour separer des matieres, et dispositif de guidage utilise a cet effet - Google Patents

Procede et dispositif pour separer des matieres, et dispositif de guidage utilise a cet effet

Info

Publication number
EP0998341A1
EP0998341A1 EP98943725A EP98943725A EP0998341A1 EP 0998341 A1 EP0998341 A1 EP 0998341A1 EP 98943725 A EP98943725 A EP 98943725A EP 98943725 A EP98943725 A EP 98943725A EP 0998341 A1 EP0998341 A1 EP 0998341A1
Authority
EP
European Patent Office
Prior art keywords
liquid
solid mixture
guide device
container
point
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.)
Withdrawn
Application number
EP98943725A
Other languages
German (de)
English (en)
Inventor
Dieter Frankenberger
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0998341A1 publication Critical patent/EP0998341A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0054—Plates in form of a coil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B01D21/2411—Feed mechanisms for settling tanks having a tangential inlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2427—The feed or discharge opening located at a distant position from the side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2444—Discharge mechanisms for the classified liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • B01D21/2461—Positive-displacement pumps; Screw feeders; Trough conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/267—Separation of sediment aided by centrifugal force or centripetal force by using a cyclone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
    • B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
    • B03B5/52—Spiral classifiers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2221/00—Applications of separation devices
    • B01D2221/04—Separation devices for treating liquids from earth drilling, mining

Definitions

  • the invention relates to a method for separating granular mineral solids such as sand from organic matter, suspended matter, slightly and sparingly soluble substances in a liquid-solid mixture, for example a mixture from wastewater treatment plants, in which the liquid-solid mixture is tangential at a radially external inlet point is introduced into a container. In the container, the liquid-solid mixture flows from the inlet point to a radially inner outlet point at such a low speed that the heavy mixture constituents, essentially the granular mineral solids, of the liquid-solid mixture sink to form a sediment bed. The sunken components of the sediment bed are then discharged and, if necessary, dewatered. Furthermore, the invention relates to a completely new guide device for improving the method mentioned.
  • the invention also relates to a device for separating granular, mineral solids, such as sand, from organic substances. Suspended substances, easily and poorly soluble substances in a liquid-solid mixture, such as a mixture of wastewater treatment plants, which contain a container for the
  • Liquid-solid mixture and to form a sediment bed from substantially sedimented solid particles. Furthermore, a correspondingly designed, radially external inlet point is provided for the tangential introduction of the liquid-solid mixture into the container. In addition, there is a radially internal discharge point on the device for the discharge of the excess liquid and the suspended matter therein, the organic matter and the like.
  • the method and the device are particularly intended for separating the sand in a solid-water mixture from organic substances, suspended substances, easily and slightly soluble substances which are carried along therein and, if appropriate, by an additionally introduced washing medium, for example water , Air or an air-water mixture.
  • an additionally introduced washing medium for example water , Air or an air-water mixture.
  • the invention relates to sand traps or sand washing plants or their working methods, in which the sand from sewage treatment plants and street sweepers is separated from putrefactive organic substances.
  • a device for separating floating substances and suspended matter from a liquid is known for example from DE 195 01 034 AI.
  • a container there is an essentially vertically extending closed partition wall, the upper area of which projects above the liquid level and is open or at least permeable in its lower area. From Fig. 3 of this document it can be seen that this vertical partition has a circular cross-section, at which a liquid with the floating and sinking substances is introduced tangentially.
  • Circular sand traps or sand classifiers or heel basins in circular construction, in which the basins are fed centrally, are disclosed, for example, in DE 43 18 522 AI.
  • the centric loading of these known devices has the disadvantage that flow losses occur which are to be avoided due to the flow direction directed from the inside to the outside.
  • a general method and a device for separating solids from a suspension is known from DE 43 12 540 Cl.
  • a tangential introduction on the outside of the container and a central discharge It is pointed out that the flow to the center of the clarification chamber is essentially spiral, but this is essentially achieved in that the flow is caused by fluidic means before entering the clarification chamber and is moved in a spiral path to the center in the clarification chamber. Due to cross flow losses, this device is not optimal with regard to the possible degree of separation.
  • a procedure and a device of the type mentioned are known from DE 44 10 969 Cl.
  • the device described here is used to separate easily soluble substances, suspended substances and poorly soluble substances from a solid or liquid-solid mixture and comprises a washing and separating container and a motor-driven, obliquely upward-facing, which adjoins the deep region of the washing and separating container a screw conveyor device with a discharge helix for discharging the separated mineral solids.
  • a drain device for discharging the liquid is created at the upper edge of the container.
  • An inlet opening for introducing a washing liquid is arranged in the deep region of the washing and separating container.
  • a drain device is used for the discharge of the washed-out, easily soluble substances, suspended substances and poorly soluble substances. It is also vertically spaced from the deep region of the washing and separating container and extends essentially vertically within the same.
  • the invention is based on the technical problem of increasing the efficiency of a procedure or a corresponding device explained at the outset, and a
  • the invention is based on the idea that the flow forming during the introduction of the liquid-solid mixture between a radially outer inlet point and a radially inner outlet point is forced to run in a spiral manner, so that the degree of excretion is increased, which is due to an extension of the travel distance and thus the Residence time of the mixture supplied is achieved.
  • the available area in a container is optimally used in order to achieve separation over a longer path length by sedimentation of the granular mineral solids present in the liquid-solid mixture.
  • the invention prevents, for the first time, so-called "short-circuit flows" from the outside to the inside of the container, which leads to a less than optimal result in the sedimentation of the solid particles carried in the mixture.
  • the invention for the first time optimally continues the spiral flow which forms itself in the edge region, namely up to the discharge point, as a result of which any cross-flow or short-circuit flow is avoided, so that the settling of the sand is supported even more effectively. This increases the efficiency of the separation of granular mineral solids in a liquid-solid mixture.
  • a very even flow which also enables optimal sedimentation of the solid particles in the mixture, is given when the forced flow is carried out in uniformly winding turns. But it depends Rectangular turns are also possible, but speed fluctuations can still occur here, especially in the corner areas. The corner areas can in turn also form sedimentation-increasing eddies in an optimal manner.
  • the flow rate from the introduction point to the diversion point can be kept essentially constant, which further increases the degree of separation.
  • a guide device for spiral forced guidance between an inlet and an outlet point in a container, the heavier constituents of the liquid-solid mixture, essentially the granular mineral solids, being separated out by sedimentation, can be readily used in existing devices or systems , as they were explained at the beginning.
  • the guide device must simply be attached in the upper area of the container. In particular, it is possible to attach the guide device to a container lid at intervals.
  • the efficiency of the device can be increased even further if a mechanical one in front of the inlet point
  • Pre-stage separating device for separating a part of the suspended matter, slightly and slightly soluble matter in the liquid-solid mixture is arranged.
  • the downstream device for separating granular mineral solids as explained at the beginning, the comprises a guide device according to the invention, achieves even better sedimentation.
  • Sieve drum in the sieve drum wall there are small holes.
  • the inside of the sieve drum is connected to a drain for mixture components of the liquid-solid mixture which do not fit through the holes.
  • a collecting line leading to the inlet point on the container of the downstream combustion device is arranged below the screening drum.
  • the sieve drum which has the large number of holes with a diameter between approximately 2 and 5 mm, the organic substances are sieved off and the sand adhering to them is rinsed off.
  • the sieve drum has a slope, which results in better pre-separation and the water can be drained off without further aids.
  • Mixing ratios and the solids to be sedimented is about 0.3 m per second or less.
  • the diversion point advantageously comprises a drain funnel, which is dimensioned in its angled length so that only a minimal suction effect arises from the drain speed.
  • a drain funnel which is dimensioned in its angled length so that only a minimal suction effect arises from the drain speed.
  • the sand or, in general, the granular mineral solids forming the sediment bed is drawn off in small batches and, if appropriate, dewatered.
  • a screw conveyor device as also disclosed in DE 44 10 969 Cl explained at the beginning, is advantageous.
  • the "channel width" specified by the guide device is constant.
  • a flow unit that is as uniform as possible is achieved.
  • the inlet and outlet are preferably at the same level, so that "short-circuit currents" below the guide device are further minimized.
  • the guide device extends - starting from a maximum loading quantity - optimally approximately 100 mm above the water surface.
  • FIG. 1 is a schematic side view of a sand washing system according to the invention, which is equipped with a new guide device,
  • FIG. 2 shows a top view of the device according to FIG. 1,
  • Fig. 3 is a schematic perspective view of a baffle according to the invention.
  • Fig. 4 is a schematic plan view of a further embodiment of a guide device according to the invention.
  • the sand washing system shown in Fig. 1 comprises a washing and separating container 1, which comprises a funnel part tapering downwards.
  • the container 1 is supported on the floor by means of supports 2.
  • the container 1 has a circular shape in the upper part and is also cylindrical in this part.
  • a pre-stage separation device 9 is arranged, which is a rotatable
  • Sieve drum 10 with holes therein and an underlying collecting channel 12 comprises. Both the screening drum 10 and the collecting trough 12 are accommodated in a housing 11.
  • the entire pre-stage separating device has a length that almost corresponds to the diameter of the washing and separating container 1.
  • the sieve drum 10 is driven by a motor, not shown here, and has a gradient.
  • the collecting trough in turn opens into an outlet 14 which is arranged higher than the inlet point 13 in the washing and separating container 1.
  • the outlet 14 and the inlet point 13 are connected to one another via a pipeline.
  • Liquid level WSP Liquid level WSP.
  • the inclination of the discharge funnel 16, seen in cross section, is designed so that a minimal suction effect arises from the discharge speed of the excess liquid, here water with the suspended substances, easily and slightly soluble substances as well as organic substances carried therein.
  • An agitator 18 is arranged in the lower region of the washing and separating container 1.
  • the agitator is arranged obliquely, but it is also possible to arrange this agitator vertically.
  • the agitator 18 comprises individual paddles, which in the sediment bed 22 which is formed from the sunken granules mineral solids, essentially sand, are rotated via an agitator drive 20 and an intermediate gear 19. This is followed by a screw conveyor 3 connected to the lower container part 1, which, supported by a support 5, projects obliquely upwards.
  • Screw conveyor 3 comprises a hollow helix 4 which is driven by a screw drive 7 and an intermediate gear 6.
  • a screw drive 7 In the upper end region there is an ejection chute 8, via which sand that has been discharged and conveyed by the hollow helix 4 is conveyed out.
  • a guide device according to the invention in the form of a guide plate 15 is arranged in the upper container part 1.
  • the baffle plate 15 is a spirally wound plate, which initially forms a channel with a substantially constant width together with the container edge, which is then formed by the adjacent baffle plate walls and spirals up to the funnel 16.
  • a spiral guide for the liquid-solid mixture introduced into the container is thus formed. This means that there is an even flow of mixture flowing inwards.
  • the baffle 15 extends only over a partial depth range below the liquid level WSP, namely to a depth at which there is still a substantially horizontal one
  • the operation of such a device will now be described below.
  • the water mixed with sand, organic substances, suspended substances, easily and sparingly soluble substances, for example from a wastewater treatment plant, is introduced into the rotating sieve drum 10.
  • the organic parts are sieved through the holes in them with a hole size between 2 and 5 mm and the adhering sand is rinsed off.
  • the remaining sand-water mixture is taken up by the collecting channel 12 and passed through the outlet 14 to the inlet point 13.
  • the gradient between the outlet 14 and the inlet point 13 gives the sand-water mixture a speed suitable for the sedimentation taking place in the container.
  • the introduction point 13 is introduced tangentially into the washing and separating container 1 filled with water, as can best be seen from FIG. 2.
  • this tangentially introduced flow is now uniform, i.e. essentially with the same
  • the agitator 18 is operated for thorough mixing in the formed sediment bed 22.
  • the collected sand is continuously transported in batches via the screw conveyor. Due to the hollow-helical design, the extracted sand is also dewatered in the discharge device 3. The sand conveyed by the hollow helix 3 is then filled into a suitable container via the discharge chute 8.
  • the second embodiment shown in FIG. 4 is a rectangular container 31, in which a baffle plate having rectangular turns comprises an optimization for the length of the section available for sedimentation. Although flow velocity changes occur in the area of the corners of the rectangular windings, there is generally also a better division and positive guidance of the available surface.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour séparer des matières solides minérales en grains, telles que du sable, de matières organiques, de matières en suspension, de matières facilement ou difficilement solubles contenues dans un mélange liquide-solides, par exemple un mélange provenant d'installations de purification d'eaux usées. Selon ledit procédé, le mélange liquide-solides est introduit de façon tangentielle dans un récipient (1), au niveau d'un point d'introduction (13). Le mélange liquide-solides s'écoulent vers un point de sortie (16), dans le récipient (1), à une vitesse assez basse pour que, pendant cet écoulement les composants lourds du mélange liquide-solides6 c'est à dire essentiellement les matières solides minérales en grains, se déposent un formant un lit de sédiments (22). Les composants déposés formant le lit de sédiments sont extraits et éventuellement déshydratés. Le procédé selon l'invention se caractérise en ce que le mélange liquide-solides est conduit de façon forcée, de façon à s'écouler en spirale, entre le point d'introduction (13) et le point de sortie (16), au moins par l'intermédiaire d'une zone profonde partielle.
EP98943725A 1997-07-11 1998-07-07 Procede et dispositif pour separer des matieres, et dispositif de guidage utilise a cet effet Withdrawn EP0998341A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19729802 1997-07-11
DE1997129802 DE19729802C2 (de) 1997-07-11 1997-07-11 Verfahren und Vorrichtung zum Trennen von Stoffen und Verwendung einer Leiteinrichtung
PCT/EP1998/004201 WO1999002237A1 (fr) 1997-07-11 1998-07-07 Procede et dispositif pour separer des matieres, et dispositif de guidage utilise a cet effet

Publications (1)

Publication Number Publication Date
EP0998341A1 true EP0998341A1 (fr) 2000-05-10

Family

ID=7835434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98943725A Withdrawn EP0998341A1 (fr) 1997-07-11 1998-07-07 Procede et dispositif pour separer des matieres, et dispositif de guidage utilise a cet effet

Country Status (4)

Country Link
EP (1) EP0998341A1 (fr)
CA (1) CA2295692A1 (fr)
DE (1) DE19729802C2 (fr)
WO (1) WO1999002237A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50013150D1 (de) * 1999-02-18 2006-08-24 Grammelsberger Axel Separation von aus organischem und anorganischem material zusammengesetzten feststoffen
GB2385292B (en) 2002-02-16 2006-01-11 Dyson Ltd Cyclonic separating apparatus
DE102009033476A1 (de) 2009-07-17 2011-01-27 Lösel, Kai Verfahren zur Gewinnung von Schwergutfeinpartikeln aus einem Sandaustrag einer Nassklassiereinrichtung und Vorrichtung dazu
EA027041B1 (ru) * 2010-10-14 2017-06-30 Эф-Эл-Смидт А/С Распределительная камера отстойника/осветлителя со спиральными внешними границами
JP6067416B2 (ja) * 2013-02-27 2017-01-25 大成建設株式会社 釜場の構造
CN106390541B (zh) * 2016-11-09 2019-02-05 大连力达环境工程有限公司 一种沉渣洗砂分离装置
CN113262532A (zh) * 2021-05-21 2021-08-17 王雯雯 一种水利工程施工用旋流式沉沙装置及其实施方法
DE102022102477A1 (de) 2022-02-02 2023-08-03 Fsm Frankenberger Gmbh & Co. Kg Behandlungsvorrichtung sowie Verfahren

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Publication number Priority date Publication date Assignee Title
DE214245C (fr) *
DE1611122B1 (de) * 1965-08-20 1972-02-03 Passavant Werke Trennvorrichtung fuer Feststoffe aus einer Suspension
DE2038045C3 (de) * 1970-07-31 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Zyklon
DE8523894U1 (de) * 1985-08-20 1985-10-31 Strate GmbH Maschinenfabrik für Abwassertechnik, 3014 Laatzen Sandfang zur Abscheidung von Sinkstoffen aus Abwasser
GB9122178D0 (en) * 1991-10-18 1991-11-27 Foster William W Separators
DE4330552C2 (de) * 1993-09-09 1997-06-12 Passavant Werke Abscheider mit Beruhigungszone zum Abtrennen von mineralischen Leichtstoffen
DE4410969C1 (de) * 1994-03-29 1995-12-07 Rudolf Bischof Gmbh Tech Hande Vorrichtung zum Trennen von leichtlöslichen Stoffen, Schwebestoffen und schwerlöslichen Stoffen aus einem Feststoff- oder Flüssigkeit-Feststoffgemisch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9902237A1 *

Also Published As

Publication number Publication date
CA2295692A1 (fr) 1999-01-21
DE19729802A1 (de) 1999-01-14
DE19729802C2 (de) 2000-06-08
WO1999002237A1 (fr) 1999-01-21

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