WO1992002462A1 - Procede et appareil de traitement electrolytique de liquides, notamment les eaux usees - Google Patents

Procede et appareil de traitement electrolytique de liquides, notamment les eaux usees Download PDF

Info

Publication number
WO1992002462A1
WO1992002462A1 PCT/FI1991/000243 FI9100243W WO9202462A1 WO 1992002462 A1 WO1992002462 A1 WO 1992002462A1 FI 9100243 W FI9100243 W FI 9100243W WO 9202462 A1 WO9202462 A1 WO 9202462A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
liquid
channel
treated
pump
Prior art date
Application number
PCT/FI1991/000243
Other languages
English (en)
Inventor
Erkki HÄIVÄLÄ
Original Assignee
Haeivaelae Erkki
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 Haeivaelae Erkki filed Critical Haeivaelae Erkki
Publication of WO1992002462A1 publication Critical patent/WO1992002462A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/46109—Electrodes
    • C02F2001/46152—Electrodes characterised by the shape or form
    • C02F2001/46157—Perforated or foraminous electrodes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4611—Fluid flow
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4618—Supplying or removing reactants or electrolyte
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/02—Fluid flow conditions
    • C02F2301/024—Turbulent

Definitions

  • the invention relates to a method and apparatus for electrolytic treatment of liquids, especially waste waters, being presented in the preamble portions of the independent claims.
  • the method has proved advantageous in the practice in the sense that the medium which is introduced between the plates and can contain substances participating in an electrolytic reaction, on one hand can contribute to creating turbulence within the reaction area when desired, thus helping to prevent the passive layers in the vicinity of the plates and to keep the surfaces of the plates clean, and on the other hand it allows to dose the substance participating in the reaction more uniformly to the reaction area, because in this way too high initial concentration of the substance participating in the reaction can be avoided in the beginning of the reaction area, which otherwise would be the case if the medium were fed together with the liquid to be treated into the reaction area between the electrodes.
  • the special features of the inventions can be utilized in an optimal manner.
  • the pulsating volumetric flow rate taking place by virtue of the feed in the through flow channel between the electrodes allows the electro ⁇ lytic reaction to proceed in phases in such a manner that when the flow is stopped in the reaction area, the necessary electrolytic reactions can take place, and when the flow advances forward, the necessary mixing occurs.
  • the liquid is a suspension or emulsion from which one of the phases will be precipitated in the process, it can be assumed that the alternately decelerated and accelerated flow taking place as early as in the reaction phase improves the separation of the substances.
  • Fig. 1 shows an apparatus used in the method in a view showing the principle
  • Fig. 2 shows the reaction chamber comprising the reaction area in a sectional view, the section being taken along the direction of the flow.
  • Fig. 1 shows schematically an apparatus in which the method according to the invention can be used.
  • the apparatus comprises a reaction chamber 1 comprising a through flow channel to which the liquid to be treated is f d along a pipe 2 by means of a pump 3.
  • the reaction chamber is also supplied with a medium separately from the liquid supplied through the pipe 2, the medium being supplied through a pipe 4 by means of a pump 5.
  • the treated liquid is passed from the through flow channel along a pipe 6.
  • the flows emerging from the pipes 2 and 4 to the through flow channel are so arranged that a pulsating flow will be present in the channel, that is, the flow taking place forward between the electrode plates is alternately accelerated and decelerated.
  • this can be ac ⁇ complished by allowing either of the pumps 3 and 5 to effect a pulsating flow, in which case a hose pump (so-called peristaltic pump) or an air pump can be used as the pump for example.
  • the pump 5 of the medium serves as the pump causing the pulsating flow
  • a centrifugal pump suitable for handling large volumetric amounts and causing a flow of constant volumetric flow rate can serve as the pump for the supply of the liquid to be treated.
  • the flow fed through the pipe 4 is preferably a substance participating in the electrolytic reaction, for example solution containing chloride, such as sodium chloride solution.
  • the method can be used in all conventional waste water treatment methods utili ⁇ zing substances in ionic or gaseous state generated in the electrolysis. Some of the examples of such methods are precipitation of heavy metals, preci ⁇ pitation of oil emulsions as well as oxidation of dissolved impurities, such as cyanide. Further, the method can be used also in the treatment of other substances as well, for example in the bleaching of pu.. suspension, the oxidating chlorine needed in the bleaching being generated within the through flow channel with the help of the chloride supplied as the maxim .
  • Fig. 2 shows the construction of the reaction chamber 1 in more detail.
  • flow channel 8 which is formed between two plate-like electrodes 7 of opposite charges and in which also the reactions caused by the electro- lysis take place and which serves as passage for the flow of the liquid to be treated.
  • the plates 7 of a rectangular shape form therebetween an elongate flow channel in the direction of their larger dimensions, said channel being limited in the direction of the planes of the plates by the outer walls of the reaction chamber, which can be of an electrically insulating material.
  • the reaction chamber is disposed vertically, the channel being situated in an upright position, that is, the main flow channel leads upwards.
  • the liquid to be treated is supplied through the pipe 2 to the lower end of the channel, from where it flows along the channel 8 to its upper end, from where it is removed through the pipe 6.
  • the treated liquid is passed through the pipe 6 to a possible aftertreatment, for example to a precipitation basin.
  • the flotation effect by the electrolytically generated gas distributed in small bubbles in the liquid is utilized, in which case the precipitation basin can have also a drag for collecting the material on the surface of the basin. Further, any heavy precipitate possibly accumulated in the chamber can easily be removed from the lower end of the chamber.
  • the medium is fed through the pipe 4 to the other side of the electrode plates, for example into sta ⁇ bilizing or intermediate containers 9, from where it enters the channel 8 by means of holes 7a going through the electrode plates 7.
  • the holes are formed in the plate-like electrode material by drilling and the size and distribution can be adapted to the need. Only one of the plates can be provided with such holes.
  • the electrodes can be formed of any suitable electrode material, depending on the process. These kind of materials are for example stainless steel, nickel- plated steel, platinum-plated titanium, consumable anodes iron and aluminum that are in common use in flocculation processes etc.
  • the pump 3 and pump 5 can be synchronized with regard to each other also in the fashion that the "pushing stage" will be alternately in the pump 5 feeding the medium and in the pump 3 feeding the liquid to be treated.
  • the pulsating flow within the channel 8 can also be achieved by the arrangement where only one of the pumps causes the pulsating volumetric flow.
  • the above-mentioned synchronizing of the pumps in respect of each other brings about the advantage that in every instant when the volumetric flow of one of the pumps is at its minimum it will not cause flow resis ⁇ tance to the maximum flow of the other pump.
  • the synchronizing the flow forward in the flow channel 8 will retain its pulsating character, because the total volumetric flow caused by the pump 3 is greater than that caused by the pump 5.
  • the distance between the plates can lie in the range of 1 to 10 cm and the plates can have the width of ca. 15 cm.
  • the height, that is, length of the flow channel can be 60 to 260 cm. It is also possible to provide the flow channel with several plates one after the other.
  • the apparatus can also be assembled starting from several chambers 1, in which case they can be cou led for exam le in series.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

Selon un procédé de traitement électrolytique de liquides, notamment les eaux usées, on fait passer le liquide à traiter dans une voie d'écoulement (8) passant entre deux électrodes (7) en forme de plaque, et cela de manière continue et selon un principe de circulation de liquides. On introduit un milieu dans ladite voie d'écoulement (8) séparément du liquide à traiter. L'écoulement dans cette voie (8) se fait de manière pulsée.
PCT/FI1991/000243 1990-08-10 1991-08-12 Procede et appareil de traitement electrolytique de liquides, notamment les eaux usees WO1992002462A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI903956 1990-08-10
FI903956A FI903956A (fi) 1990-08-10 1990-08-10 Foerfarande och apparatur foer elektrolytisk behandling av vaetskor, i synnerhet avfallsvatten.

Publications (1)

Publication Number Publication Date
WO1992002462A1 true WO1992002462A1 (fr) 1992-02-20

Family

ID=8530907

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1991/000243 WO1992002462A1 (fr) 1990-08-10 1991-08-12 Procede et appareil de traitement electrolytique de liquides, notamment les eaux usees

Country Status (3)

Country Link
AU (1) AU8312391A (fr)
FI (1) FI903956A (fr)
WO (1) WO1992002462A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4410658A1 (de) * 1994-03-26 1995-09-28 Wt Wassertechn Gmbh Verfahren und Vorrichtung zum Aufbereiten von industriellen Abwässern im Wege der Elektrolyse
US5630934A (en) * 1993-06-16 1997-05-20 Enpar Technologies Inc. In-situ treatment system for inhibiting the formation of, and for alleviating, acidity in water
US5921113A (en) * 1996-10-14 1999-07-13 Samsung Electronics Co., Ltd. Clothes washing machine having electrolytic purifier for waste water
EP1074515A2 (fr) * 1999-08-06 2001-02-07 Sterilox Medical (Europe) Limited Traitement chimique d une solution aqueuse
EP1878704A1 (fr) * 1999-08-06 2008-01-16 PuriCore Europe Limited Traitement électrochimique d'une solution aqueuse
WO2012164164A1 (fr) * 2011-05-27 2012-12-06 Atlantis Life Systems, Inc. Procédé et appareil pour le traitement électrochimique des eaux contaminées ou usées
DE102013226357A1 (de) * 2013-12-18 2015-06-18 Siemens Aktiengesellschaft Pulsierende Elektrolytzufuhr in den Reaktionsraum einer Elektrolysezelle mit gasentwickelnden Elektroden

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1560732A (en) * 1976-07-21 1980-02-06 Berlyn Ronald Van Electrolytic waste water purification method and apparatus
WO1988000926A1 (fr) * 1986-08-04 1988-02-11 Haeivaelae Erkki Procede et appareil pour le traitement electrolytique de liquides, en particulier des eaux usees
US4913779A (en) * 1986-06-06 1990-04-03 Institut National Polytechnique De Toulouse Process and installation for electrolysis by percolation across one or several porous volumic electrodes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1560732A (en) * 1976-07-21 1980-02-06 Berlyn Ronald Van Electrolytic waste water purification method and apparatus
US4913779A (en) * 1986-06-06 1990-04-03 Institut National Polytechnique De Toulouse Process and installation for electrolysis by percolation across one or several porous volumic electrodes
WO1988000926A1 (fr) * 1986-08-04 1988-02-11 Haeivaelae Erkki Procede et appareil pour le traitement electrolytique de liquides, en particulier des eaux usees
FI76773B (fi) * 1986-08-04 1988-08-31 Erkki Haeivaelae Foerfarande foer elektrolytisk behandling av skadliga komponenter, saosom cyanid innehaollande avloppsvatten och vid foerfarandet anvaendbar anordning.

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630934A (en) * 1993-06-16 1997-05-20 Enpar Technologies Inc. In-situ treatment system for inhibiting the formation of, and for alleviating, acidity in water
DE4410658A1 (de) * 1994-03-26 1995-09-28 Wt Wassertechn Gmbh Verfahren und Vorrichtung zum Aufbereiten von industriellen Abwässern im Wege der Elektrolyse
US5921113A (en) * 1996-10-14 1999-07-13 Samsung Electronics Co., Ltd. Clothes washing machine having electrolytic purifier for waste water
EP1074515A2 (fr) * 1999-08-06 2001-02-07 Sterilox Medical (Europe) Limited Traitement chimique d une solution aqueuse
EP1074515A3 (fr) * 1999-08-06 2002-04-10 Sterilox Medical (Europe) Limited Traitement chimique d une solution aqueuse
US6632347B1 (en) 1999-08-06 2003-10-14 Sterilox Medical (Europe) Limited Electrochemical treatment of an aqueous solution
US7303660B2 (en) 1999-08-06 2007-12-04 Puricore International Ltd. Electrochemical treatment of an aqueous solution
EP1878704A1 (fr) * 1999-08-06 2008-01-16 PuriCore Europe Limited Traitement électrochimique d'une solution aqueuse
WO2012164164A1 (fr) * 2011-05-27 2012-12-06 Atlantis Life Systems, Inc. Procédé et appareil pour le traitement électrochimique des eaux contaminées ou usées
DE102013226357A1 (de) * 2013-12-18 2015-06-18 Siemens Aktiengesellschaft Pulsierende Elektrolytzufuhr in den Reaktionsraum einer Elektrolysezelle mit gasentwickelnden Elektroden

Also Published As

Publication number Publication date
AU8312391A (en) 1992-03-02
FI903956A0 (fi) 1990-08-10
FI903956A (fi) 1992-02-11

Similar Documents

Publication Publication Date Title
EP3145876B1 (fr) Appareil de traitement de liquide électrochimique
US3479281A (en) Method and apparatus for the separation of phases by gaseous flotation
US5928493A (en) Process and apparatus for electrocoagulative treatment of industrial waste water
US3669857A (en) ELECTROLYTIC CHLORINATION AND pH CONTROL OF WATER
US4755305A (en) Continuous dewatering method
US8778166B2 (en) Process for sewage water purification
US4071447A (en) Dewatering of wastewater treatment wastes
CA2837124A1 (fr) Procede et appareil pour le traitement electrochimique des eaux contaminees ou usees
JPH0839074A (ja) 電気分解により工業廃水を処理する方法および装置
CA1334658C (fr) Appareil de traitement electrolytique des boues
EP0318483B1 (fr) Procede et appareil pour le traitement electrolytique de liquides, en particulier des eaux usees
US11046596B2 (en) Electrochemical liquid treatment apparatus
WO1992002462A1 (fr) Procede et appareil de traitement electrolytique de liquides, notamment les eaux usees
JPH02247391A (ja) 改良された電解装置およびアノード
Il'in et al. Purification of highly concentrated industrial sewage from the porcelain and faience industry by the electric flotation method
RU2100483C1 (ru) Способ обработки воды гипохлоритом натрия и проточный электролизер для получения гипохлорита натрия
EP4081487B1 (fr) Procédé et ensemble pour purifier une solution aqueuse
SU1675215A1 (ru) Способ очистки сточных вод от ионов т желых металлов и устройство дл его осуществлени
IT9021299A1 (it) Cella elettrolitica a corrente incrociata, in particolare per la depurazione per elettroflocculazione e/o per elettroflottazione di acque di scarico sotto forma di emulsioni e/o sospensioni
RU96103337A (ru) Способ обработки воды гипохлоритом натрия и проточный электролизер для получения гипохлорита натрия
RU2207983C2 (ru) Способ получения дезинфицирующих растворов и установка для его осуществления
RU2122892C1 (ru) Газлифтный аппарат
SU1401016A1 (ru) Аппарат дл извлечени маслопродуктов
JPS6295103A (ja) 抽出装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR CA CH CS DE DK ES FI GB HU JP KP KR LK LU MC MG MN MW NL NO PL RO SD SE SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BF BJ CF CG CH CI CM DE DK ES FR GA GB GN GR IT LU ML MR NL SE SN TD TG

NENP Non-entry into the national phase

Ref country code: CA