EP1680213B1 - Buse de detente d eau pressurisee pour generer des microbulles dans une installation de flottation. - Google Patents

Buse de detente d eau pressurisee pour generer des microbulles dans une installation de flottation. Download PDF

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Publication number
EP1680213B1
EP1680213B1 EP04791465A EP04791465A EP1680213B1 EP 1680213 B1 EP1680213 B1 EP 1680213B1 EP 04791465 A EP04791465 A EP 04791465A EP 04791465 A EP04791465 A EP 04791465A EP 1680213 B1 EP1680213 B1 EP 1680213B1
Authority
EP
European Patent Office
Prior art keywords
stage
expansion
orifice
nozzle
tube
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.)
Not-in-force
Application number
EP04791465A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1680213A1 (fr
Inventor
Patrick Vion
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.)
Suez International SAS
Original Assignee
Degremont SA
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 Degremont SA filed Critical Degremont SA
Priority to PL04791465T priority Critical patent/PL1680213T3/pl
Priority to SI200430309T priority patent/SI1680213T1/sl
Publication of EP1680213A1 publication Critical patent/EP1680213A1/fr
Application granted granted Critical
Publication of EP1680213B1 publication Critical patent/EP1680213B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • 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
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • 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
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/24—Pneumatic
    • B03D1/242—Nozzles for injecting gas into the flotation tank

Definitions

  • the present invention relates to an expansion nozzle for generating microbubbles in a flotation cell.
  • Flotation therefore constitutes a clarification technology (solid / liquid separation) which is an alternative to decantation at least for certain types of water.
  • the water is mixed with a "milk" (emulsion) of microbubbles generally of air (having an average diameter of between 30 to 80 ⁇ m ).
  • milk emulsion
  • microbubbles cling to the flocs, which, in this way lightened, tend to rise towards the surface of the flotation cell where they accumulate to form a slick bed or bed.
  • the sludge is extracted from the surface of the float, while the clarified water is evacuated from the bottom of the device.
  • this clarified water (usually of the order of 10% of the water to be treated) is pumped to 4 or 6 10 5 Pa in a specific balloon (called pressurization balloon) where the air dissolves in large amount (up to 5 times the maximum concentration of air in the water at atmospheric pressure).
  • pressurization balloon a specific balloon
  • the air dissolves in large amount (up to 5 times the maximum concentration of air in the water at atmospheric pressure).
  • the water is placed in a supersaturation condition and generates microbubbles. This relaxation is performed by static systems called expansion nozzles. These expansion nozzles are placed in a specific area where the microbubbles are mixed with the flocculated water.
  • a floc To be physically separated from water in a decanter, a floc must be dense or large. But to be separated by flotation, it suffices that the said floc be formed; he can be small and very light. Flocculation can therefore be simplified, hence the almost total absence of polymer for the flotation treatment of lightly loaded water and the implementation of flocculation reactors smaller than those of settling tanks.
  • microbubble generators must produce microbubbles of very small diameter with energy dissipated in the medium compatible with the fragility of the floc.
  • the invention proposes to provide a new nozzle to obtain on industrial installations (large capacity nozzles> 500 l / h) unexpectedly high hydraulic performance, and in particular operation at more than 30 m / h instead of 20 m / h with the "B" nozzle According to the prior art.
  • the first and second expansion stages are in the form of a diaphragm having one or more orifices of any shape, the hydraulic diameter of the orifice of the first stage, or the equivalent orifice if this stage has several orifices, being greater than the hydraulic diameter of the orifice of the second stage, or of the equivalent orifice if this stage comprises several.
  • the expansion d 1 is performed by means of a valve, a baffle or any other flow restriction device.
  • the intermediate or transit chamber has a height, that is to say a distance separating the first expansion stage of the second stage which is smaller than the diameter of the orifice of the first expansion (Or the equivalent orifice if this stage has several orifices), preferably equal to half of this diameter.
  • the nozzle according to the present invention comprises a first expansion stage 1 realized here in the form of a diaphragm having an orifice of diameter d1, an intermediate or transfer chamber 3, a second stage of trigger 2 having two or more orifices (the equivalent hydraulic diameter of these orifices being equal to d2), and an outlet tube 4.
  • the diaphragm constituting the expansion of a stage may comprise one or more orifices. If it comprises several orifices (as is the case with the second expansion stage 2 of this embodiment), the hydraulic diameter d (that is to say d2 in this embodiment) is the equivalent diameter of an orifice whose surface is equal to the sum of the surfaces of the orifices of this diaphragm.
  • the first expansion stage 1 performs a simple pre-expansion, the objective being that upstream of the second expansion stage 2, the pressure is close to the saturation pressure of the pressurized water.
  • the hydraulic diameter d1 of the orifice of the flow restriction system constituting this first stage 1 is greater than that of the hydraulic diameter d2 of the orifice of the diaphragm constituting the second stage 2 (or of the equivalent orifice when this diaphragm comprises several orifices as is the case of the embodiment illustrated by FIG. 1).
  • d1 is equal to 1.5 d2.
  • the pressure drop is of the order of 5 to 35%, preferably of the order of 15%.
  • the gas in particular air
  • the height of the chamber 3 must be less than the equivalent hydraulic diameter of the orifice of the flow restriction system of the first expansion stage 1, this height e being the distance separating the two stages of relaxation as can be seen in Figure 1.
  • This intermediate transfer chamber 3 is a transit chamber to approach the saturation.
  • the pressure drop obtained in this chamber 3 is of the order of 5 to 30%.
  • the second expansion stage, 2 is, according to the present invention, the only effective expansion that passes the pressurized water from the saturation pressure to the outlet pressure of the nozzle (nozzle immersion height).
  • the hydraulic diameter d2 of the orifice (or of the equivalent orifice) of the diaphragm constituting this stage 2 is always smaller than that of the first stage 1 and preferably about 1.5 times smaller .
  • the pressure drop obtained by this second expansion stage 2 is of the order of 60 to 90%, preferably 70%. The goal is to focus in one point the entire relaxation and generation of microbubbles.
  • This second expansion stage 2 is brutally enlarged, the exit angle of the orifices of the diaphragm constituting it being flat (180 °) or between 90 and 270 °.
  • this length L is a function of the diameter of the tube and essentially the distance between the outer wall of the jet or jets and the inner wall of the tube.
  • the minimum length L of the tube 4 corresponds substantially to the distance separating the end of said tube on the second expansion stage 2 from the point where the jets meet on the walls of the tube. tube, with an angle ⁇ divergence of the jets, before gluing, between 3 and 12 °, preferably between 6 and 9 °.
  • the diaphragm constituting the second expansion stage 2 comprises either a single central orifice of any shape (circular, square, rectangular, elliptical), or several orifices located equidistant from the center of the diaphragm.
  • This type of embodiment makes it possible to generate more large bubbles than the WRC nozzles, but the microbubbles are thinner.
  • the curves illustrated in FIG. 2 visualize the results obtained in turbidity of the milk of microbubbles and in% of large bubbles.
  • the best nozzle is normally the nozzle that generates the least large bubbles and has the most dense milk.
  • the figures associated with the DGT nozzles correspond to the lengths L in mm of the tubes 4 provided with a trumpet end 5 (black squares). It is verified that a length insufficient 25 mm does not allow to generate a dense milk. It is necessary to have a length of at least 35 mm so that the liquid veins glue on the walls and ultimately get a quality milk. Given the fact that the diaphragm constituting the second expansion stage 2 had 3 orifices, the diffusion angle ⁇ of the jet to reattach to the wall in 35 mm is between 6 to 9 ° (12 to 18 ° in the center). too large length increases the amount of large bubbles probably by friction. The quality of the milk tends to decrease.
  • the best nozzles seem to be the improved WRC + nozzle (low amount of large bubbles and correct turbidity) and the DGT 35 and DGT 65 nozzles (high milk density despite a high rate of large bubbles).
  • the hydraulic diameter d1 of the orifice of the first expansion stage 1 or of the equivalent orifice if this stage comprises several orifices may be between 1.6 and 1.1 times the diameter of the orifice of the second expansion stage or of the equivalent orifice if this stage comprises several orifices.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Physical Water Treatments (AREA)
  • Nozzles (AREA)
  • Cyclones (AREA)
  • Safety Valves (AREA)
  • Paper (AREA)
  • Measuring Fluid Pressure (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP04791465A 2003-10-10 2004-10-05 Buse de detente d eau pressurisee pour generer des microbulles dans une installation de flottation. Not-in-force EP1680213B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL04791465T PL1680213T3 (pl) 2003-10-10 2004-10-05 Dysza rozprężania wody pod ciśnieniem dla generowania mikropęcherzyków w instalacji flotacyjnej
SI200430309T SI1680213T1 (sl) 2003-10-10 2004-10-05 Šoba za izpust vode pod tlakom za tvorjenje mikromehurčkov v flotacijski napravi

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0311910A FR2860735B1 (fr) 2003-10-10 2003-10-10 Buse de detente d'eau pressurisee pour generer des microbules dans une installation de flottation
PCT/FR2004/002510 WO2005035105A1 (fr) 2003-10-10 2004-10-05 Buse de detente d'eau pressurisee pour generer des microbulles dans une installation de flottation.

Publications (2)

Publication Number Publication Date
EP1680213A1 EP1680213A1 (fr) 2006-07-19
EP1680213B1 true EP1680213B1 (fr) 2007-03-07

Family

ID=34355408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04791465A Not-in-force EP1680213B1 (fr) 2003-10-10 2004-10-05 Buse de detente d eau pressurisee pour generer des microbulles dans une installation de flottation.

Country Status (19)

Country Link
US (2) US20070119987A1 (zh)
EP (1) EP1680213B1 (zh)
KR (1) KR101136337B1 (zh)
CN (1) CN100413569C (zh)
AT (1) ATE355889T1 (zh)
AU (1) AU2004280269B2 (zh)
BR (1) BRPI0415137B1 (zh)
CA (1) CA2540866C (zh)
DE (2) DE602004005230T2 (zh)
DK (1) DK1680213T3 (zh)
ES (1) ES2267418T3 (zh)
FR (1) FR2860735B1 (zh)
HK (1) HK1093460A1 (zh)
NZ (1) NZ546480A (zh)
PL (1) PL1680213T3 (zh)
PT (1) PT1680213E (zh)
RU (1) RU2324531C2 (zh)
SI (1) SI1680213T1 (zh)
WO (1) WO2005035105A1 (zh)

Families Citing this family (22)

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US7448734B2 (en) * 2004-01-21 2008-11-11 Silverbrook Research Pty Ltd Inkjet printer cartridge with pagewidth printhead
US8840786B2 (en) 2007-01-09 2014-09-23 Evoqua Water Technologies Llc System and method for removing dissolved contaminants, particulate contaminants, and oil contaminants from industrial waste water
US20100213123A1 (en) 2007-01-09 2010-08-26 Marston Peter G Ballasted sequencing batch reactor system and method for treating wastewater
US20110036771A1 (en) 2007-01-09 2011-02-17 Steven Woodard Ballasted anaerobic system and method for treating wastewater
US8470172B2 (en) 2007-01-09 2013-06-25 Siemens Industry, Inc. System for enhancing a wastewater treatment process
FR2916196B1 (fr) * 2007-05-18 2009-07-24 Otv Sa Installation de traitement d'eau par flottation, et procede de traitement d'eau correspondant
FR2922439B1 (fr) 2007-10-18 2010-12-10 Hill Rom Ind Sa Procede de gonflage alterne d'un dispositif de support a cellules gonflables et dispositif pour sa mise en oeuvre
WO2011133533A2 (en) 2010-04-20 2011-10-27 California Institute Of Technology Method to generate micro scale gas filled liquid bubbles as tracer particles or inhaler mist for drug delivery
CN101912734B (zh) * 2010-08-20 2012-04-25 中国科学院过程工程研究所 用于制备纳米-数十微米级乳液的膜组件以及乳液制备方法
DE102011012782A1 (de) * 2011-01-20 2012-07-26 Rainer Glöckler Algenernteverfahren und Algenerntevorrichtung zur Durchführung des Algenernteverfahrens
EP2827979A1 (en) * 2012-03-22 2015-01-28 Universiteit Twente Apparatus and method for mass producing a monodisperse microbubble agent
WO2013187979A1 (en) 2012-06-11 2013-12-19 Siemens Water Technologies Llc Treatment using fixed film processes and ballasted settling
AU2013323431B2 (en) 2012-09-26 2017-10-12 Evoqua Water Technologies Llc System for measuring the concentration of magnetic ballast in a slurry
US9884295B2 (en) 2012-10-08 2018-02-06 Doosan Heavy Industries & Construction Co., Ltd. Membrane bioreactor system using reciprocating membrane
EP2928612A1 (en) 2012-12-07 2015-10-14 Advanced Water Recovery LLC Dissolved air flotation, antisolvent crystallisation and membrane separation for separating buoyant materials and salts from water
US9422168B2 (en) 2013-04-24 2016-08-23 Doosan Heavy Industries & Construction Co., Ltd. Dissolved air flotation device for liquid clarification
CN103232108B (zh) * 2013-05-15 2014-03-05 陕西师范大学 新型文丘里管式水力空化水处理装置
US9724460B2 (en) 2014-03-25 2017-08-08 Oakwood Healthcare, Inc. Controlled nucleation from gas-supersaturated liquid
CN105297356B (zh) * 2014-07-09 2019-02-01 青岛海尔智能技术研发有限公司 一种洗衣机的絮凝容器进水结构及洗衣机
FR3031099B1 (fr) * 2014-12-24 2019-08-30 Veolia Water Solutions & Technologies Support Buse optimisee d'injection d'eau pressurisee contenant un gaz dissous.
US10603681B2 (en) * 2017-03-06 2020-03-31 Engineered Spray Components LLC Stacked pre-orifices for sprayer nozzles
KR102397440B1 (ko) * 2017-03-23 2022-05-12 주식회사 위니아전자 세탁기 및 세탁기의 미세 기포 생성기 및 세탁기의 미세 기포를 포함한 세탁수의 공급 방법

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Also Published As

Publication number Publication date
ES2267418T3 (es) 2007-09-16
DE04791465T1 (de) 2007-01-18
HK1093460A1 (en) 2007-03-02
FR2860735A1 (fr) 2005-04-15
DK1680213T3 (da) 2007-04-02
RU2324531C2 (ru) 2008-05-20
US7651620B2 (en) 2010-01-26
SI1680213T1 (sl) 2007-08-31
PT1680213E (pt) 2007-03-30
CN1867393A (zh) 2006-11-22
CA2540866C (fr) 2012-05-15
ES2267418T1 (es) 2007-03-16
US20090218293A1 (en) 2009-09-03
KR101136337B1 (ko) 2012-04-19
DE602004005230T2 (de) 2007-07-05
EP1680213A1 (fr) 2006-07-19
DE602004005230D1 (de) 2007-04-19
FR2860735B1 (fr) 2006-12-22
CA2540866A1 (fr) 2005-04-21
WO2005035105A1 (fr) 2005-04-21
BRPI0415137B1 (pt) 2014-10-14
US20070119987A1 (en) 2007-05-31
PL1680213T3 (pl) 2007-09-28
KR20060122827A (ko) 2006-11-30
ATE355889T1 (de) 2007-03-15
AU2004280269A1 (en) 2005-04-21
RU2006115380A (ru) 2007-12-20
NZ546480A (en) 2010-06-25
BRPI0415137A (pt) 2006-11-28
CN100413569C (zh) 2008-08-27
AU2004280269B2 (en) 2010-07-29

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