WO2010079523A1 - Appareil pour le traitement des eaux usées - Google Patents

Appareil pour le traitement des eaux usées Download PDF

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Publication number
WO2010079523A1
WO2010079523A1 PCT/IT2010/000003 IT2010000003W WO2010079523A1 WO 2010079523 A1 WO2010079523 A1 WO 2010079523A1 IT 2010000003 W IT2010000003 W IT 2010000003W WO 2010079523 A1 WO2010079523 A1 WO 2010079523A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
cross
ejector
circuit
conduit
Prior art date
Application number
PCT/IT2010/000003
Other languages
English (en)
Inventor
Adriano Troia
Daniele Angelo Madonna Ripa
Renato Spagnolo
Original Assignee
Instituto Nazionale Di Ricerca Metrologica
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 Instituto Nazionale Di Ricerca Metrologica filed Critical Instituto Nazionale Di Ricerca Metrologica
Priority to EP10706762A priority Critical patent/EP2384310A1/fr
Publication of WO2010079523A1 publication Critical patent/WO2010079523A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4335—Mixers with a converging-diverging cross-section

Definitions

  • the present invention relates to the treatment of waste-waters from industrial facilities, and particularly to an apparatus for treating such wastewaters.
  • the object of the present invention is an apparatus for treating polluted waters comprising a tank adapted to contain waters to be treated, said tank being connected by means of an appropriate conduit to a pump provided with control and driving means, flow restriction means being provided downstream of said pump, the flow being transferred to said tank by means of a conduit, the circuit being provided with discharging means.
  • more than one flow restriction means can be provided to be arranged in the circuit of the apparatus of the invention, which more than one flow restriction means are arranged in parallel or in series to improve the operational efficiency of the same circuit.
  • the flow restriction means comprise a substantially tubular conduit having a variable inner free cross-section, and particularly provided with free cross-sections which are substantially identical to each other at both the ends thereof, while the portion comprised between the two ends is a reduced cross-section portion whose free cross-section is substantially from 1/3 to 1/10 the free cross-section at both the ends.
  • said free cross- section of said reduced cross-section portion is from about 1/4 to 1/8 the free cross-section at both the ends.
  • said reduced cross-section portion can be arranged near said flow inlet end of said conduit with respect to the flow of liquid to be treated.
  • the inner side walls of said conduit can be substantially continuously tapered from said ends towards said reduced cross-section portion. Particularly, the inclination of the inner side walls will have a slope change which is increased along the length running from the flow inlet end to said reduced cross-section portion.
  • said reduced cross- section portion can be formed by discretely changing, i.e. step-wise with steps constant or variable in height, the cross-section of the inner side walls of said conduit.
  • circuit of the apparatus of the invention can be provided with means to collect samples in order to monitor the processes being carried out, and with means to inject liquid and/or gaseous fluids into the same circuit in order to introduce agents which can enhance the degradation processes of the pollutants contained in the liquid being treated.
  • Figure 1 is a schematic diagram showing the apparatus according to the present invention.
  • Figure 2 is a cross-section view of an embodiment of the flow restriction means of the apparatus of the invention.
  • Figure 3 is a cross-section view of a variant embodiment of the flow restriction means of the apparatus of the invention.
  • FIGS 4 and 5 are diagrams showing the oscillation rate of the bubbles generated within the apparatus at two different operational speeds of the pump.
  • Figure 6 is a diagram showing the depletion of a pollutant versus the treatment time in the apparatus according to the invention.
  • FIG. 1 there is schematically shown the apparatus according to the present invention
  • reference numeral 1 denotes a tank into which the liquid intended to be treated by the apparatus of the invention is charged.
  • the liquid is introduced through a conduit 101 provided with monitoring means 111 ;
  • a conduit 2 of the circuit of the apparatus is connected to the conduit 111 , then a heat exchanger 201 is arranged within the tank 201.
  • the tank is connected to the conduit 2 of the circuit which is connected to a pump 3 controlled by an inverter 103 to allow for the adjustment thereof;
  • a discharge conduit 102 and a conduit 202 for collecting samples and feeding fluids are provided between the pump 3 and the tank 1.
  • a flow restriction means 4 in this case an appropriately shaped ejector, is inserted in the circuit downstream of the pump 3. As shown in the figure, more than one flow restriction means can be inserted in the circuit by providing a further branch 302 and a flow-monitoring means 312 for said branch.
  • An accelerometer 402 is arranged immediately downstream of the ejector 4 in order to monitor the oscillation rate of the bubbles being formed. Thereafter, the conduit 2 extends through the heat exchanger 502 and then into the conduit 101 to introduce the liquid into the tank 1.
  • FIG 2 there is shown an ejector of the type as used with the apparatus schematically shown in Figure 1.
  • the ejector 4 has an inlet port 104 substantially circular in cross-section, and an outlet port 204 having a similar cross-section.
  • the internal side wall of the ejector 4 Near the inlet port 104, the internal side wall of the ejector 4 has a tapered inlet portion 304 with an inclination of about 40° with respect to the central axis of said ejector 4 up to a reduced cross-section portion 404 having a cross-section which is about 1/4 the cross-section of the inlet port 104 of the ejector.
  • a tapered outlet portion 504 is formed following the reduced cross-section portion 404 and towards the outlet port 204, said tapered outlet portion 504 having an inclination of about 10° with respect to the axis of the ejector 4 and opposed to the inclination of the inlet portion 304.
  • the apparatus according to the present invention has been implemented in a prototype corresponding to the scheme of Figure 1 , comprising a centrifugal pump 3 with a polypropylene impeller driven by an AC motor controlled by the inverter 103 so as to change the revolution speed of the pump at a steady power level.
  • the maximum flow- rate of the pump used on the prototype is 300 litres per minute, but it can be easily adapted to meet the various needs of the end user.
  • the conduits of the circuit are made of PVC and iron internally coated with teflon of 1" ⁇ A (about 3.8 cm) in diameter:
  • the fluid flows through an ejector appropriately sized in relation to the cross-section of the inlet port, the tapering angles and the cross-section of the outlet port, depending on the kind of treatment to be carried out by the apparatus.
  • the diameter of the inlet portion is 34 mm and it is reduced to 8 mm at the central portion with an inclination of 40 degrees; the outlet portion is tapered with an angle of 10 degrees, so as the cavitation bubbles produced in the central portion collapse about 20 mm from the same central portion.
  • the efficiency in the production of cavitation and the amount of collapse suffered by the gaseous bubbles depend on the negative pressure generated within the central portion of the Venturi tube. This amount of negative pressure depends on structural details of the tube, particularly on the ratio between the cross-section of the inlet portion and the cross-section of the central portion according to the following mathematical relationship:
  • Pneg pressure at the central portion of the Venturi tube
  • P 0 ambient pressure value
  • p fluid density
  • u fluid speed
  • the temperature of the fluid After 30 minutes the temperature of the fluid reaches 60 0 C and, after one hour, it is stabilized at 80°C even extending the functioning time.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Water Treatments (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Appareil destiné à traiter des eaux polluées, comportant un circuit comprenant une cuve (1) prévue pour contenir des eaux à traiter, ledit circuit étant muni d'un conduit (101) d'alimentation équipé d'un moyen (111) de commande, ladite cuve (1) étant reliée au moyen d'un conduit (2) approprié à une pompe (3) munie de moyens (103) de commande et d'entraînement, un moyen (4) de restriction du débit étant installé en aval de ladite pompe (3), l'écoulement étant transféré vers ladite cuve (1) au moyen d'un conduit (2), ledit circuit étant muni d'un moyen (102) d'évacuation.
PCT/IT2010/000003 2009-01-09 2010-01-08 Appareil pour le traitement des eaux usées WO2010079523A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10706762A EP2384310A1 (fr) 2009-01-09 2010-01-08 Appareil pour le traitement des eaux usées

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITGE2009A000001A IT1392647B1 (it) 2009-01-09 2009-01-09 Apparato per il trattamento di acque reflue inquinate.
ITGE2009A000001 2009-01-09

Publications (1)

Publication Number Publication Date
WO2010079523A1 true WO2010079523A1 (fr) 2010-07-15

Family

ID=40908473

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2010/000003 WO2010079523A1 (fr) 2009-01-09 2010-01-08 Appareil pour le traitement des eaux usées

Country Status (3)

Country Link
EP (1) EP2384310A1 (fr)
IT (1) IT1392647B1 (fr)
WO (1) WO2010079523A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3659977A1 (fr) * 2018-11-27 2020-06-03 Steinhardt GmbH Dispositif de traitement des liquides par cavitation hydromécanique et sous-compression

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5326468A (en) * 1992-03-02 1994-07-05 Cox Dale W Water remediation and purification method and apparatus
JP2004057936A (ja) * 2002-07-29 2004-02-26 Babcock Hitachi Kk 水質浄化装置ならびにそれに用いるキャビテーションリアクター用ノズル
US20040042336A1 (en) * 2000-11-20 2004-03-04 Kozyuk Oleg V Device and method for creating hydrodynamic cavitation in fluids
DE10258898A1 (de) * 2002-12-17 2004-07-01 Institut für Energetik und Umwelt gGmbH Inaktivierung von Mikroorganismen
DE102004045915A1 (de) * 2004-09-20 2006-03-30 Schmid, Andreas, Dr.-Ing. M.Sc. Verfahren und Vorrichtung zur Desinfektion von Wasser
JP2006305546A (ja) * 2005-03-29 2006-11-09 Yaskawa Electric Corp 汚水処理装置
JP2007203229A (ja) * 2006-02-03 2007-08-16 Mitsuishi Seisakusho:Kk 有機化合物の分解処理システム

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5326468A (en) * 1992-03-02 1994-07-05 Cox Dale W Water remediation and purification method and apparatus
US20040042336A1 (en) * 2000-11-20 2004-03-04 Kozyuk Oleg V Device and method for creating hydrodynamic cavitation in fluids
JP2004057936A (ja) * 2002-07-29 2004-02-26 Babcock Hitachi Kk 水質浄化装置ならびにそれに用いるキャビテーションリアクター用ノズル
DE10258898A1 (de) * 2002-12-17 2004-07-01 Institut für Energetik und Umwelt gGmbH Inaktivierung von Mikroorganismen
DE102004045915A1 (de) * 2004-09-20 2006-03-30 Schmid, Andreas, Dr.-Ing. M.Sc. Verfahren und Vorrichtung zur Desinfektion von Wasser
JP2006305546A (ja) * 2005-03-29 2006-11-09 Yaskawa Electric Corp 汚水処理装置
JP2007203229A (ja) * 2006-02-03 2007-08-16 Mitsuishi Seisakusho:Kk 有機化合物の分解処理システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3659977A1 (fr) * 2018-11-27 2020-06-03 Steinhardt GmbH Dispositif de traitement des liquides par cavitation hydromécanique et sous-compression

Also Published As

Publication number Publication date
EP2384310A1 (fr) 2011-11-09
ITGE20090001A1 (it) 2010-07-10
IT1392647B1 (it) 2012-03-16

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