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WO1999003591A1 - Installation de purification de liquides non electroconducteurs, en particulier d'huiles vegetales - Google Patents

Installation de purification de liquides non electroconducteurs, en particulier d'huiles vegetales Download PDF

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Publication number
WO1999003591A1
WO1999003591A1 PCT/EP1998/004407 EP9804407W WO9903591A1 WO 1999003591 A1 WO1999003591 A1 WO 1999003591A1 EP 9804407 W EP9804407 W EP 9804407W WO 9903591 A1 WO9903591 A1 WO 9903591A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
liquid
plant according
electrode
vegetable oils
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.)
Ceased
Application number
PCT/EP1998/004407
Other languages
German (de)
English (en)
Inventor
Gunter BÖRNER
Rainer Wetzel
Uwe Zimmerling
Burkhardt Nenn
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.)
Ohmi Forschung und Ingenieurstechnik GmbH
Siemens AG
Siemens Corp
Original Assignee
Ohmi Forschung und Ingenieurstechnik GmbH
Siemens AG
Siemens Corp
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 Ohmi Forschung und Ingenieurstechnik GmbH, Siemens AG, Siemens Corp filed Critical Ohmi Forschung und Ingenieurstechnik GmbH
Priority to AU89756/98A priority Critical patent/AU8975698A/en
Publication of WO1999003591A1 publication Critical patent/WO1999003591A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C5/00—Separating dispersed particles from liquids by electrostatic effect
    • B03C5/02—Separators
    • B03C5/022—Non-uniform field separators
    • B03C5/026—Non-uniform field separators using open-gradient differential dielectric separation, i.e. using electrodes of special shapes for non-uniform field creation, e.g. Fluid Integrated Circuit [FIC]

Definitions

  • the invention relates to a system for cleaning electrically non-conductive liquids, in particular vegetable oils, with reaction containers for the separation of substances from the electrically non-conductive liquids, in particular vegetable oils, according to the principle of electrostatic separation.
  • the reaction in the container represents sedimentation of solid particles.
  • the electrofiltration of electrically non-conductive liquids is known. It is used in particular to separate unwanted substances from non-conductive liquids, for example vegetable oils, mineral oils, finishing oils, solvents, resins or glycerin.
  • vegetable oils it should be considered that such oils are used in particular as food and are a renewable raw material. This results in a remarkable world raw production with an annual growth of approx. 5%.
  • a bleaching earth process is mainly carried out for the purpose of adsorbing unwanted accompanying substances.
  • the so-called bleaching is an essential quality-determining process step in oil production.
  • the bleaching earth after the adsorption step is conventionally separated by precoat filtration.
  • the temperature field is used.
  • a container with an inlet for the mixture and an outlet for the separate components is provided by arranging electrodes which are insulated from one another for generating the electric fields.
  • the object is achieved by the entirety of the features of claim 1. Further developments are preferably characterized by the subclaims. In particular, there is a relationship that describes the relationship between all relevant parameters of the system and the cleaning or filtration process that takes place therein.
  • the invention realizes a container with which, on the one hand, the combination of the geometry of the apparatus, the flow behavior of the fluid and the application of an electric field between 5 and 50 kV / c, preferably between 8 and 30 kV / cm complete separation of the
  • Solid particles on at least one electrode and on the other a clarified fluid without using additional filter elements or filter aids. This makes it possible to achieve economic advantages over conventional pressure filtration methods. In particular, it is now possible to use fine-grain bleaching earth. This results in a further reduced cleaning effort and a reduced energy consumption.
  • the inner wall of the metallic containers with the associated inner electrode are constructed in a specific construction. It can be a cylindrical or a rounded flat container.
  • the inner wall of the container and the inner electrode are formed on all sides in the region of the separation zone without edges, so that a completely smooth surface of both electrodes is thus achieved. The efficiency can thus be increased.
  • reaction tanks In the overall system with several tanks, at least two reaction tanks are connected in a modular manner so that a continuous discharge of liquid is ensured. This enables continuous or at least quasi-continuous production operation of the system.
  • the reaction containers are connected on the solids side to a collecting container for re-sedimentation.
  • the sedimentation process taking place in the plant according to the invention can be carried out with pressure filtration can be combined, which further increases the efficiency of the overall system and its range of applications.
  • FIG. 1 shows the side view of a container
  • FIG. 2 shows the associated inner electrode
  • FIG. 3 shows an alternative arrangement of a container with a concentric inner electrode
  • FIG. 4 and FIG. 5 sections along the lines IV-IV and V-V in FIG. 3,
  • FIG. 6 shows the top view and FIG. 7 shows the side view of an arrangement of a plurality of containers which are connected in series in a modular manner, and FIG. 8 shows a plurality of reaction containers connected together with a collecting container.
  • 1 to 8 mean reaction vessels for sedimentation of solid particles from a liquid through electrostatic fields, which are arranged next to one another in particular as a battery and are connected fluidically in parallel.
  • the number of containers is arbitrary and is determined by the required throughput of the entire system.
  • FIG. 1 shows an example of a single container 1, which is constructed from metallic material with a solid container wall 10. Go from the container wall 10 an inlet 11 for the liquid to be filtered, an outlet 12 for the clarified liquid and a conical outlet 13 for the separated solid.
  • reaction containers 1 to 8 are designed with their container walls as rounded flat containers.
  • the inner electrode designed for one of the containers 1 to 8 according to FIGS. 1, 6 or 7 is designated by 20. It consists in particular of at least one large-area and flat separating plate 21, which is combined with a round tubular frame 22.
  • the electrode 20 with its separating plate 21 is adjusted to the geometry of the inner volume enclosed by the container wall 10.
  • the container with its container wall and the inner electrode in the region of the separation zone are formed on all sides without edges.
  • the distance s between the two electrodes formed in this way is constant all round and l.a. smaller than 50 mm. Overall, a completely smooth surface of all electrodes is achieved. Thus there can be no disturbing field inhomogeneities that would degrade the efficiency of a reaction vessel.
  • the necessary boundary conditions for the use of specific liquids in particular with regard to the geometry of the containers and the electrical field sizes of the system, can be found.
  • the viscosity of the liquid to be cleaned reflects the temperature dependence of the separation process.
  • FIGS. 3 to 5 show an alternative arrangement to that of FIG. 1 and FIG. 2 consisting of a container and the associated inner electrode: it is essential here that the container wall 10 'enclose a round cylinder in which the inner electrode 20' is arranged concentrically. Liquid outlet 11, finished product outlet 12 and outlet 13 for the separated solid are essentially in the same form as in FIG. 1. Again, there are no edges between the inner container wall 10 'and the outer surface of the electrode 20'. Furthermore, it is particularly important in FIG. 3 that the inner electrode 20 'widens from a smaller to a larger cross section in the direction of flow of the fluid.
  • FIGS. 6 to 8 It can be seen from FIGS. 6 to 8 that, for example, there are eight containers in a complete system, which in turn are designated 1 to 8 in detail. Two containers 1/2, 3/4, 5/6 and 7/8 are connected in such a way that they can work alternately. This ensures that a quasi-continuous production operation for the cleaning or filtration of non-conductive liquids, such as vegetable oils in particular, is ensured.
  • the individual reaction vessels are connected in parallel in a modular manner, so that the cleaned product can be discharged continuously.
  • FIG. 8 It is shown specifically in FIG. 8 that a plurality of containers 1 to 8 for sedimentation of solid particles from a liquid are connected to a single collecting container 50 with a subsequent valve 51. This means that the separated substances are re-sedimented, which is equivalent to an increase in the concentration of these substances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrostatic Separation (AREA)

Abstract

L'invention concerne des installations qui comportent des réservoirs de réaction métalliques pour la séparation de substances dans des liquides non électroconducteurs, en particulier des huiles végétales, selon le principe de la séparation électrostatique. Dans l'installation selon l'invention, on établit un champ électrique entre la paroi de réservoir (10, 10') et une électrode interne concentrique (20, 20'), et le réservoir (1 - 8 et 1') comporte une arrivée (11) pour le liquide à filtrer, une sortie (12) pour le liquide filtré et une évacuation conique (13) pour la matière solide séparée. Une caractéristique essentielle de l'installation est qu'on n'utilise pas de produits filtrants entre les électrodes (10, 20) afin de garantir un filtrage continu. En coupe horizontale, la distance (s) entre les surfaces de l'électrode interne (20) et de la paroi interne (10) du réservoir est constante en périphérie. La distance d'électrode (s) dépend, entre autres, du type de liquide non conducteur, des particules en suspension, du débit et de la tension applicable.
PCT/EP1998/004407 1997-07-15 1998-07-15 Installation de purification de liquides non electroconducteurs, en particulier d'huiles vegetales Ceased WO1999003591A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU89756/98A AU8975698A (en) 1997-07-15 1998-07-15 Installation for purifying electrically nonconductive liquids, in particu lar vegetable oils

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997130331 DE19730331C1 (de) 1997-07-15 1997-07-15 Anlage zur Reinigung von elektrisch nichtleitenden Flüssigkeiten, insbesondere Pflanzenölen
DE19730331.5 1997-07-15

Publications (1)

Publication Number Publication Date
WO1999003591A1 true WO1999003591A1 (fr) 1999-01-28

Family

ID=7835791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/004407 Ceased WO1999003591A1 (fr) 1997-07-15 1998-07-15 Installation de purification de liquides non electroconducteurs, en particulier d'huiles vegetales

Country Status (3)

Country Link
AU (1) AU8975698A (fr)
DE (1) DE19730331C1 (fr)
WO (1) WO1999003591A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114950736A (zh) * 2022-02-25 2022-08-30 长沙理工大学 太阳能板清洗用静电吸附尘水分离装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447049A (en) * 1965-05-05 1969-05-27 Vassilis C P Morfopoulos Use of inhomogeneous electrical fields in processes influenced by electrical fields
WO1992004429A1 (fr) * 1990-09-11 1992-03-19 Grundmann Juergen Procede et dispositif de separation d'impuretes indesirbales d'accompagnement contenues dans des liquides a conductivite electrique reduite ou nulle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS217491B1 (en) * 1980-12-01 1983-01-28 Jan Zubak Apparatus for electrostatic clearing of dielectric liquids
SU1710134A1 (ru) * 1989-12-22 1992-02-07 Государственный Научно-Исследовательский И Проектный Институт Нефтяной И Газовой Промышленности Им.В.А.Муравленко Устройство дл электросепарации дисперсных сред
DE4344828A1 (de) * 1993-12-28 1995-06-29 Oehmi Forsch & Ingtech Gmbh Verfahren und Vorrichtung zum Reinigen von Feststoffpartikeln enthaltenden Flüssigkeiten

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447049A (en) * 1965-05-05 1969-05-27 Vassilis C P Morfopoulos Use of inhomogeneous electrical fields in processes influenced by electrical fields
WO1992004429A1 (fr) * 1990-09-11 1992-03-19 Grundmann Juergen Procede et dispositif de separation d'impuretes indesirbales d'accompagnement contenues dans des liquides a conductivite electrique reduite ou nulle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114950736A (zh) * 2022-02-25 2022-08-30 长沙理工大学 太阳能板清洗用静电吸附尘水分离装置

Also Published As

Publication number Publication date
DE19730331C1 (de) 1999-02-18
AU8975698A (en) 1999-02-10

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