WO2021176260A1 - Appareil de génération de bulles d'air et procédé correspondant - Google Patents

Appareil de génération de bulles d'air et procédé correspondant Download PDF

Info

Publication number
WO2021176260A1
WO2021176260A1 PCT/IB2020/053695 IB2020053695W WO2021176260A1 WO 2021176260 A1 WO2021176260 A1 WO 2021176260A1 IB 2020053695 W IB2020053695 W IB 2020053695W WO 2021176260 A1 WO2021176260 A1 WO 2021176260A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
cylinder
determined
liquid
determined amount
Prior art date
Application number
PCT/IB2020/053695
Other languages
English (en)
Inventor
Arun Ganesaraman
Ashwin RAJVEL G.A
Original Assignee
Arun Ganesaraman
Rajvel G A Ashwin
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 Arun Ganesaraman, Rajvel G A Ashwin filed Critical Arun Ganesaraman
Publication of WO2021176260A1 publication Critical patent/WO2021176260A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/223—Activated sludge processes using circulation pipes using "air-lift"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
    • B01F23/232311—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit the conduits being vertical draft pipes with a lower intake end and an upper exit end
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • Airlift pumps can be used to enhance circulation and mixing of this air and water.
  • the purpose of an airlift pump is a pump that has low suction and moderate discharge of liquid and entrained solids.
  • the pump injects compressed air at the bottom of the discharge pipe which is immersed in the liquid.
  • the compressed air mixes with the liquid causing the air-liquid mixture to be less dense than the rest of the liquid around it and therefore is displaced upwards through the discharge pipe by the surrounding liquid of higher density. Solids may be entrained in the flow and if small enough to fit through the pipe, will be discharged with the rest of the flow at a shallower depth or above the surface.
  • Airlift pumps are widely used in aquaculture to pump, circulate and aerate liquid in closed, recirculating systems and ponds.
  • gas bubbles are formed.
  • Gas bubble forming devices can be used in various ways for different applications and typically function via the introduction of a continuous flow of gas-directed into; 1) a vertical column having an open upper end and most often an open bottom end, these are typically termed as a static tube aerator; 2) a distribution manifold or diffuser comprising of orifices; 3) a venturi type fixture that functions with a continuous flow of pressurized liquid moving through a restriction generating a slight vacuum that can draw gas into the liquid thereby forming gas bubbles to be entrained within the liquid and released into the bulk liquid.
  • the gas bubbles once released into the liquid will change the density of the liquid within the area of discharge and thereby provide a means for generating flow and or mixing the liquid as is the case of a static tube type process.
  • a continuous flow of gas for the purpose of pumping liquid via an ‘airlift’ process is inefficient since they have a small lift capacity and suction or flow velocity as compared to mechanical pumping devices. Therefore, their use is limited to pumping liquid only vertically a short height above the liquid surface level. In cases where continuous gas flow ‘airlift’ type pumps are applied within liquid containing particulates or sludge, the limited suction or flow velocity can further lead to clogging problems.
  • an apparatus for generation of an air bubble includes a top part configured to receive a pre-determined amount of air via an air nozzle, the top part including a top opening.
  • the apparatus also includes an outer cylinder including a first pre-determined diameter, wherein the outer cylinder is configured to further receive the pre determined amount of air from the top part.
  • the apparatus also includes a middle cylinder including a second pre-determined diameter, wherein the middle cylinder is positioned within the outer cylinder, thereby forming a first pre-determined gap between the middle cylinder and the outer cylinder.
  • the method also includes receiving a second pre-determined amount of liquid at a pre-determined amount of liquid pressure through the bottom part.
  • the method also includes ejecting a second air bubble from the inner cylinder due to the pre-determined amount of liquid pressure acting on the remnant air inside the outer, middle and inner cylinders. The ejection of first bubble and second bubble is continuous joining them together without a gap.
  • FIG. 1 illustrates an exploded view of an apparatus for generation of an air bubble in accordance with an embodiment of the present disclosure
  • FIG. 2 illustrates an isometric view of the apparatus for generation of an air bubble in accordance with an embodiment of FIG. 1 of the present disclosure
  • FIG. 3 illustrates an isometric view of the apparatus for generation of an air bubble in accordance with an embodiment of the present disclosure
  • FIG. 4 illustrates an isometric view of the apparatus for generation of an air bubble in accordance with an embodiment of the present disclosure
  • FIG. 5 illustrates a flow chart representing steps involved in a method for FIG. 1 in accordance with an embodiment of the present disclosure.
  • FIG. 1 illustrates an exploded view of an apparatus for generation of an air bubble in accordance with an embodiment of the present disclosure.
  • the apparatus includes a top part (102), an outer cylinder (108), a middle cylinder (106), an inner cylinder (104) and a bottom part (110).
  • the top part (102) is cylindrically shaped of a pre-determined diameter.
  • the top part (102) includes a top opening (102a) positioned in the centre of the top part (102).
  • the top part (102) also includes an air nozzle (112) positioned at a pre-determined distance from the top opening (102a) on the top part (102).
  • the air nozzle (112) is configured to receive a pre-determined amount of air having a pre determined amount of air pressure.
  • the bottom part (110) is cylindrically shaped of a pre-determined diameter.
  • the bottom part (110) includes a plurality of openings (114) on the cylindrical surface of the bottom part (110).
  • the bottom part (110) includes a protrusion coupled to the inner base of the bottom part (110).
  • the bottom part (110) is configured to receive a first pre-determined amount of liquid upon submerging the apparatus (200, 300, 400) in a liquid body, via the plurality of openings (114).
  • the liquid may be, including but not limited to, oil and water.
  • the second pre-determined diameter is small compared to the first pre determined diameter, thereby creating a first gap between the outer cylinder (108) and the middle cylinder (106).
  • the inner cylinder (104) is of a third pre-determined diameter- ‘x’, wherein the inner cylinder (104) is positioned within the middle cylinder (106).
  • the inner cylinder (104) includes a top inner cylinder end (104a) and a bottom inner cylinder end (104b). The top inner cylinder end (104a) is coupled to the top opening (102a) of the top part (102).
  • the pre-determined amount of air is received into the outer cylinder (108) and into the middle cylinder (106), via the second pre-determined position (206) until, wherein the pre-determined amount of air pushes the first pre determined amount of liquid downwards towards the bottom part (110) by the pre determined amount of air pressure.
  • a part of the pre-determined amount of air is ejected out of the top opening (102a) of the top part (102) via the first pre-determined position (204) and through the inner cylinder (104), thereby leaving behind remnant air in the inner cylinder (104), middle cylinder (106), outer cylinder (108) and forming an air bubble in the liquid with the ejected air.
  • a predefined cubic feet of air is ejected through a predefined square feet area of the inner pipe, during the ejection time, but the ejection time is about a second. Therefore, the velocity value should be feet per second (approximately) or feet per ejection time.
  • y the first pre-determined diameter of the outer cylinder (108);
  • x the third pre-determined diameter of the inner cylinder (104);
  • x' the second pre-determined diameter of the middle cylinder (106);
  • z' the first pre-determined position at which the bottom inner cylinder end (104b) terminates; and
  • z the second pre-determined position at which the top middle cylinder end (106a) terminates.
  • FIG. 3 illustrates an isometric view of the apparatus (300) for generation of an air bubble in accordance with an embodiment of the present disclosure.
  • the apparatus (300) includes the top part (102), the out cylinder, the middle cylinder (106), the inner cylinder (104) and the bottom part (110).
  • the middle cylinder (106) as aforementioned in FIG. 1, is operatively coupled to the bottom part (110) as shown in FIG. 3.
  • the bottom middle cylinder end (106b) is operatively coupled to the centre of the bottom part (110).
  • FIG. 5 illustrates a flow chart representing steps involved in a method for FIG. 1 in accordance with an embodiment of the present disclosure.
  • the method (500) includes receiving a first predetermined amount of liquid, in step 502.
  • the method (500) includes submerging a top part, a bottom part, an outer cylinder, a middle cylinder and an inner cylinder.
  • the first pre-determined amount of liquid is received into the outer cylinder, the middle cylinder and the inner cylinder via a plurality of openings.
  • the plurality of openings is positioned in the bottom part. In an alternative embodiment, the plurality of openings is positioned on the outer cylinder.
  • the method (500) includes receiving a pre-determined amount of air, in step 504.
  • the method (500) includes receiving the pre-determined amount of air via an air nozzle coupled to the top part from an air supply unit into the outer cylinder and the middle cylinder, wherein the pre-determined amount of air has a pre determined amount of air pressure.
  • the first pre-determined amount of liquid is pushed downwards into the outer cylinder and the middle cylinder until a first pre-determined position.
  • the first pre-determined position represents a bottom inner cylinder end terminating at a position prior to the bottom part.
  • the method (500) includes ejecting a first air bubble, in step 506.
  • the method (500) includes ejecting the pre-determined amount of air from the first pre-determined position through the inner cylinder via a top opening of the top part into the liquid, thereby resulting in remnant air within the inner cylinder, middle cylinder and outer cylinder.
  • the method (500) includes receiving a second pre-determined amount of liquid, in step 508.
  • the method (500) includes receiving the second pre determined amount of liquid sequentially instantaneous to ejecting the first air bubble in step 506.
  • the method (500) includes receiving the second pre-determined amount of liquid having a pre-determined amount of liquid pressure, via the plurality of openings into the outer cylinder. Due to the pre-determined amount of liquid pressure, the remnant air is pushed upwards into the outer cylinder and into the middle cylinder via a second pre-determined position.
  • the second pre-determined position represents a position where a top middle cylinder end terminates prior to the top part.
  • the method (500) includes ejecting a second air bubble from the inner cylinder, in step 510.
  • the method (500) includes ejecting the second sir bubble from the inner cylinder simultaneously with receiving the second pre-determined amount of liquid as mentioned in step 508.
  • the method (500) includes ejecting all the remnant air through the inner cylinder via the pre-determined amount of liquid pressure.
  • the remnant air when ejected into the liquid, combines with the first air bubble, thereby increasing the diameter of the first air bubble, which rises up to the liquid surface at high velocity due to buoyancy of the second air bubble.
  • the ejecting of the first bubble is in continuation with the receiving of the second pre-determined amount of liquid and ejecting the second sir bubble from the inner cylinder.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)

Abstract

La présente invention concerne un appareil pour la génération de bulles d'air. L'appareil comprend une partie supérieure qui reçoit une quantité prédéterminée d'air par l'intermédiaire d'une buse d'air, la partie supérieure comprenant une ouverture supérieure. Un cylindre externe, d'un premier diamètre prédéterminé, reçoit la quantité d'air prédéterminée à partir de la partie supérieure Un cylindre intermédiaire, d'un deuxième diamètre prédéterminé, est positionné à l'intérieur du cylindre externe. Une partie inférieure reçoit une première quantité prédéterminée de liquide lors de l'immersion dans un corps liquide, et une seconde quantité prédéterminée de liquide dans le cylindre central et le cylindre externe, au moins un élément parmi le cylindre externe et la partie inférieure comprenant une pluralité d'ouvertures. Un cylindre interne, d'un troisième diamètre prédéterminé, est positionné à l'intérieur du cylindre central. Le cylindre interne éjecte la quantité prédéterminée d'air par la pression de la seconde quantité prédéterminée de liquide.
PCT/IB2020/053695 2020-03-06 2020-04-19 Appareil de génération de bulles d'air et procédé correspondant WO2021176260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041009677 2020-03-06
IN202041009677 2020-03-06

Publications (1)

Publication Number Publication Date
WO2021176260A1 true WO2021176260A1 (fr) 2021-09-10

Family

ID=77613924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/053695 WO2021176260A1 (fr) 2020-03-06 2020-04-19 Appareil de génération de bulles d'air et procédé correspondant

Country Status (1)

Country Link
WO (1) WO2021176260A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6986506B2 (en) * 2003-05-01 2006-01-17 Chapman Teddie C Water aerator and method of using same
JP2006167175A (ja) * 2004-12-16 2006-06-29 Fukushima Mitsuo 気泡発生装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6986506B2 (en) * 2003-05-01 2006-01-17 Chapman Teddie C Water aerator and method of using same
JP2006167175A (ja) * 2004-12-16 2006-06-29 Fukushima Mitsuo 気泡発生装置

Similar Documents

Publication Publication Date Title
US4215081A (en) Liquid aerator
JP2011011098A (ja) 水質浄化装置
WO1992003218A1 (fr) Aeration de liquides
KR101108279B1 (ko) 마이크로 버블 디퓨져
US11325079B2 (en) Combined coarse and fine bubble diffuser
JP2011183328A (ja) 曝気装置
AU2021435297B2 (en) Method and systems for oxygenation of water bodies
EP1670574A1 (fr) Procede et dispositif pour melanger deux fluides
WO2021176260A1 (fr) Appareil de génération de bulles d'air et procédé correspondant
KR101424949B1 (ko) 액막 산기장치
CA2707580C (fr) Dispositif pour infuser du gaz dans un liquide
US10874995B2 (en) Apparatus for mixing fluids, including fluids containing solids
JP2013240748A (ja) 散気装置
KR101162576B1 (ko) 수질 개선용 폭기 시스템
JPH07108295A (ja) 廃水の加圧ばっ気処理装置
US11155482B2 (en) Apparatus and method for aerating wastewater
KR101813113B1 (ko) 기포 크기 조절이 가능한 자흡식 포기기 및 이를 이용한 기포의 크기 조절방법
CA2835789A1 (fr) Pompe a fluide intermittente et procede
JP2003230824A (ja) 微小気泡生成装置および方法
US20240091721A1 (en) Aerator
JPH03103132A (ja) 養殖池の酸素供給装置
US10273177B2 (en) Apparatus for lifting liquid in a body of liquid
RU2181343C2 (ru) Устройство для аэрации жидкости
RU2081578C1 (ru) Аэратор и ферментер с аэрирующим и перемешивающим устройством
JP2021130069A (ja) 気液分散装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20922841

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20922841

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 20922841

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 27.10.2023)