EP4147770A1 - Dispositif de dissolution de gaz - Google Patents

Dispositif de dissolution de gaz Download PDF

Info

Publication number
EP4147770A1
EP4147770A1 EP20934639.4A EP20934639A EP4147770A1 EP 4147770 A1 EP4147770 A1 EP 4147770A1 EP 20934639 A EP20934639 A EP 20934639A EP 4147770 A1 EP4147770 A1 EP 4147770A1
Authority
EP
European Patent Office
Prior art keywords
gas
dissolving tank
liquid
intake tube
upper chamber
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.)
Pending
Application number
EP20934639.4A
Other languages
German (de)
English (en)
Other versions
EP4147770A4 (fr
Inventor
Yinchun Cao
Nobuaki Utsumi
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.)
Sanso Electric Co Ltd
Original Assignee
Sanso Electric Co Ltd
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 Sanso Electric Co Ltd filed Critical Sanso Electric Co Ltd
Publication of EP4147770A1 publication Critical patent/EP4147770A1/fr
Publication of EP4147770A4 publication Critical patent/EP4147770A4/fr
Pending legal-status Critical Current

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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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/25—Mixing by jets impinging against collision plates
    • 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
    • B01F23/234—Surface aerating
    • B01F23/2341—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere
    • B01F23/23413—Surface aerating by cascading, spraying or projecting a liquid into a gaseous atmosphere using nozzles for projecting the liquid into the gas atmosphere
    • 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
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
    • 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
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/50—Movable or transportable mixing devices or plants
    • B01F33/502—Vehicle-mounted mixing devices

Definitions

  • the present invention relates to a gas dissolver that dissolves gas in liquid under pressure.
  • a gas dissolver is described in, for example, Patent Literature 1.
  • the gas dissolver described in Patent Literature 1 is a microbubble generator that generates microbubbles in a bath.
  • the gas dissolver in this literature includes a gas dissolving tank (a gas-liquid dissolving tank in Patent Literature 1) that dissolves gas in liquid, a suction pipe channel extending from the bath to a pump for the gas dissolving tank, an intake tube (an inlet pipe channel in Patent Literature 1) extending from the pump into the gas dissolving tank, and a discharge pipe channel extending from the exit of the gas dissolving tank to the bath.
  • a gas intake (a gas intake tube in Patent Literature 1) for introducing gas is located halfway along the suction pipe channel.
  • the gas-liquid dissolving tank is charged with liquid to a predetermined height, thus defining a liquid area and a gas area.
  • the intake tube ejects a gas-liquid mixture in the gas-liquid dissolving tank.
  • the ejected gas-liquid mixture collides with a collision section on the ceiling of the gas-liquid dissolving tank.
  • the collision forms a local high-pressure part, at which the gas dissolves more readily in the liquid.
  • the gas-liquid mixture falls from the gas area to the liquid area, and air bubbles contained in the gas-liquid mixture enter the liquid area.
  • the air bubbles dissolve in the liquid while being agitated by the flow in the liquid area, and decrease in size.
  • the air bubbles agitated by the flow in the liquid area are discharged partially through the outlet in the gas dissolving tank together with the liquid.
  • the partial air bubbles and the liquid discharged through the outlet flow into the discharge pipe channel.
  • Patent Literature 1 Japanese Patent No. 4759553
  • Patent Literature 1 cannot easily increase the dissolved gas concentration due to relatively large air bubbles flowing out in large amounts through the outlet in the gas dissolving tank, and also cannot easily increase the gas dissolving efficiency.
  • one or more aspects of the present invention are directed to a gas dissolver that increases the dissolved gas concentration and the gas dissolving efficiency more easily than known structures.
  • a gas dissolver includes a gas dissolving tank that dissolves gas in liquid inside, a partition dividing an inside of the gas dissolving tank into an upper chamber and a lower chamber, an intake tube to introduce a gas-liquid mixture into the gas dissolving tank from outside, and a discharge pipe channel to discharge gas dissolved liquid from the lower chamber of the gas dissolving tank.
  • the intake tube has a downstream end with an opening extending toward a center of a ceiling of the gas dissolving tank.
  • the partition includes a connecting path connecting the upper chamber and the lower chamber. The connecting path is off a center of the partition.
  • a gas dissolver according to a second aspect of the present invention is the gas dissolver according to the first aspect in which the ceiling may include a collision section defining a protrusion-dent portion, and the intake tube may be located to cause an ejected gas-liquid mixture to collide with the collision section.
  • a gas dissolver according to a third aspect of the present invention is the gas dissolver according to the second aspect in which the protrusion-dent portion may include protrusions having lower ends extending further downward at positions more outward.
  • a gas dissolver according to a fourth aspect of the present invention is the gas dissolver according to any one of the first to third aspects in which the lower chamber may have a volume smaller than an effective volume of the upper chamber, where the effective volume of the upper chamber is a part of the upper chamber below the downstream end of the intake tube.
  • a gas dissolver according to a fifth aspect of the present invention is the gas dissolver according to any one of the first to third aspects in which the discharge pipe channel may be connected to an outlet in a bottom surface of the gas dissolving tank, and the outlet may be off the connecting path as viewed from above.
  • a gas dissolver according to a sixth aspect of the present invention is the gas dissolver according to any one of the first to fourth aspects in which the intake tube may have a smaller opening area at the downstream end than at an upstream end.
  • the gas dissolver according to the above aspects of the present invention increases the dissolved gas concentration and the gas dissolving efficiency easily.
  • a gas dissolver 100 according to the present embodiment is a device for dissolving gas in liquid.
  • the gas dissolver 100 includes a gas dissolving tank 1, a suction pipe channel 2, a discharge pipe channel 3, a pump 4, a gas introducer 5, and an intake tube 6.
  • the gas is oxygen
  • the liquid is water.
  • the gas may be a gas different from oxygen (e.g., air, carbon dioxide, or nitrogen), and the liquid may be a liquid different from water.
  • the gas dissolving tank 1 dissolves gas in liquid inside under pressure.
  • the inside of the gas dissolving tank 1 illustrated in FIG. 1 includes a first portion 7 that is a substantially cylindrical space having a relatively large diameter, a second portion 8 that is a substantially cylindrical space having a relatively small diameter, and a third portion 9 that is a substantially truncated-cone space defined continuously between the first portion 7 and the second portion 8.
  • the first portion 7 is defined above a bottom plate 11 and inside a large-diameter cylindrical section 12.
  • the second portion 8 is defined below a ceiling 13 and inside a small-diameter cylindrical section 14.
  • the third portion 9 is defined inside a conical cylindrical section 16 tapering from the large-diameter cylindrical section 12 and continuous with the small-diameter cylindrical section 14.
  • the intake tube 6, a partition 17, and a collision section 19 are provided inside the gas dissolving tank 1.
  • the partition 17 divides the inside of the gas dissolving tank 1 into an upper chamber 22 and a lower chamber 23. In the present embodiment, the partition 17 divides the first portion 7 horizontally.
  • the partition 17 includes at least one connecting path 17a connecting the upper chamber 22 and the lower chamber 23. The one or more connecting paths 17a are formed off the center of the partition 17.
  • the lower chamber 23 has a smaller volume than the upper chamber 22. With the effective volume of the upper chamber 22 being a part of the upper chamber 22 below a downstream end 6a of the intake tube 6, the volume of the lower chamber 23 is smaller than the effective volume of the upper chamber 22. In the first portion 7 divided horizontally by the partition 17, the part below the partition 17 has a smaller volume than the part above the partition 17. As shown in FIG. 1 , the liquid area of the lower chamber 23 is smaller than the liquid area of the upper chamber 22.
  • the intake tube 6 is located to introduce a gas-liquid mixture into the gas dissolving tank 1 from outside.
  • the intake tube 6 is connected to the downstream end of the suction pipe channel 2 with the pump 4.
  • the intake tube 6 extends along the center axis of the gas dissolving tank 1, with an opening in the downstream end 6a opposing the center of the ceiling 13 of the gas dissolving tank 1.
  • the intake tube 6 extends through the center of the bottom (the bottom plate 11) of the gas dissolving tank 1 and the center of the partition 17.
  • it is desirable that the intake tube 6 has a smaller opening area at the downstream end 6a than at an upstream end 6b (refer to FIG. 4 ).
  • the collision section 19 includes a protrusion-dent portion on the ceiling 13.
  • the protrusion-dent portion of the collision section 19 on the ceiling 13 includes protrusions having lower ends extending further downward at positions more outward.
  • the collision section 19 includes multiple members that are arranged concentrically, or specifically, a first cylindrical member 19a to a third cylindrical member 19c. In the example shown in FIG. 1 , the lower ends of the first cylindrical member 19a to the third cylindrical member 19c are located lower at positions more outward.
  • the area of the ceiling 13 with the collision section 19 (the area inside the outer diameter of the third cylindrical member 19c designated by D in the example shown in FIG. 2 ) is smaller than the area of a liquid surface 20 in the gas dissolving tank 1.
  • the suction pipe channel 2 has an upstream end serving as a suction port for liquid.
  • the upstream end of the suction pipe channel 2 is submerged in a liquid 27 stored in a container 26 as shown in FIG. 4 .
  • the pump 4 is located between the downstream end of the suction pipe channel 2 and the upstream end of the intake tube 6. Thus, when the pump 4 is driven, the liquid stored in the container 26 is drawn into the suction pipe channel 2 and pressure-fed through the intake tube 6 into the gas dissolving tank 1. The inside of the gas dissolving tank 1 is pressurized when the pump 4 is driven.
  • the gas introducer 5 is located halfway along the intake tube 6.
  • the gas introducer 5 mixes compressed gas fed from a compressed-gas source 28 into the liquid flowing in the intake tube 6.
  • the compressed gas is fed from the compressed-gas source 28 at a pressure higher than the pressure in the suction pipe channel 2.
  • the discharge pipe channel 3 has an upstream end connected to an outlet 29 in a bottom surface 1a of the gas dissolving tank 1.
  • the discharge pipe channel 3 has a downstream end located in the container 26. Liquid is ejected through the downstream end with an increased dissolved gas concentration into the container 26.
  • the gas dissolving tank 1 is supported by a gas dissolving tank support 31.
  • the gas dissolving tank support 31 illustrated in this figure includes a housing 33 supporting the gas dissolving tank 1 and also covering the gas dissolving tank 1.
  • the gas dissolving tank support 31 includes the housing 33 and a mount 34 fixed to the housing 33, and the bottom plate 11 of the gas dissolving tank 1 is, for example, bolted to the mount 34.
  • the housing 33 also includes a top board 33a to which the ceiling 13 of the gas dissolving tank 1 is, for example, bolted.
  • the pipes serving as the intake tube 6 and the discharge pipe channel 3 protrude downward from the mount 34 by predetermined dimensions and extend in different lateral directions through the housing 33 to the outside.
  • the gas dissolving tank support 31 is movable on casters 32 at the bottom.
  • the liquid is drawn from the container 26 into the suction pipe channel 2, and the gas introducer 5 mixes gas into the liquid flowing in the intake tube 6 to form a gas-liquid mixture.
  • the resultant gas-liquid mixture is ejected through the downstream end 6a of the intake tube 6 into the gas dissolving tank 1.
  • the gas dissolves in the liquid depending on the area of contact between the liquid and the gas and on the pressure in the gas dissolving tank 1.
  • the gas area and the liquid area are defined.
  • the gas-liquid mixture ejected through the downstream end 6a of the intake tube 6 first collides with the collision section 19, forming a local high-pressure part, at which the gas (air bubbles) dissolves efficiently in the liquid.
  • the gas-liquid mixture colliding with the collision section 19 then passes through the gas area and reaches the liquid area.
  • the area of contact between the liquid and the gas increases, thus promoting the dissolution of the gas in the liquid also in this area.
  • the gas dissolving tank 1 includes the partition 17 with the connecting path 17a. With these components, air bubbles in the liquid area cannot easily be discharged through the outlet 29, and thus a larger amount of gas remains in the gas dissolving tank 1 and dissolves in the liquid. Thus, the gas dissolver 100 according to the present embodiment increases the dissolved gas concentration and the gas dissolving efficiency more easily than a known gas dissolver.
  • the volume of the lower chamber 23 is smaller than the effective volume of the upper chamber 22.
  • the liquid area in the upper chamber 22 may have larger capacity than the liquid area in the lower chamber 23.
  • the liquid area in the upper chamber 22 containing more air bubbles is larger than the lower chamber 23 containing less air bubbles.
  • the liquid area in the upper chamber 22 may have larger capacity than the liquid area in the lower chamber 23, and thus the dissolved gas concentration and also the gas dissolving efficiency are more likely to increase.
  • the collision section 19 includes multiple members that are arranged concentrically, or specifically, the cylindrical members 19a to 19c.
  • a collision section may include concentrically arranged curved plates 19Aa to 19Ac having different radiuses and each including two pieces.
  • the curved plates 19Aa to 19Ac also have lower ends extending further downward at positions more outward.
  • the collision section 19 is not limited to these two examples and may have various forms with a protrusion-dent portion on the lower surface of the ceiling 13.
  • the intake tube 6 extends through the center of the bottom plate 11 of the gas dissolving tank 1 and the center of the partition 17 and along the center axis of the gas dissolving tank 1.
  • the intake tube 6 may be located in other forms.
  • an intake tube may extend from the outside through the side of the gas dissolving tank in a lateral direction to the inside, bend upward at the center of the gas dissolving tank, and extend along the center axis.
  • the present invention is applicable to, for example, a gas dissolver that dissolves gas in liquid under pressure.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
EP20934639.4A 2020-05-08 2020-08-20 Dispositif de dissolution de gaz Pending EP4147770A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020082338 2020-05-08
PCT/JP2020/031529 WO2021225009A1 (fr) 2020-05-08 2020-08-20 Dispositif de dissolution de gaz

Publications (2)

Publication Number Publication Date
EP4147770A1 true EP4147770A1 (fr) 2023-03-15
EP4147770A4 EP4147770A4 (fr) 2024-05-29

Family

ID=78468070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20934639.4A Pending EP4147770A4 (fr) 2020-05-08 2020-08-20 Dispositif de dissolution de gaz

Country Status (4)

Country Link
EP (1) EP4147770A4 (fr)
JP (1) JP7520471B2 (fr)
CN (1) CN115605285A (fr)
WO (1) WO2021225009A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003190750A (ja) * 2001-12-26 2003-07-08 Yokogawa Electric Corp 気体溶解装置
JP2006180829A (ja) * 2004-12-28 2006-07-13 Seiwa Pro:Kk 魚介類の収容装置
JP4374327B2 (ja) * 2005-05-10 2009-12-02 大晃機械工業株式会社 気体溶解装置
JP4378337B2 (ja) * 2005-09-15 2009-12-02 松江土建株式会社 気液溶解装置
JP4878004B2 (ja) * 2007-05-25 2012-02-15 ヤマハリビングテック株式会社 気体溶解器および気泡発生装置
JP4944718B2 (ja) * 2007-09-12 2012-06-06 ヤマハリビングテック株式会社 気泡発生装置
JP4759553B2 (ja) * 2007-11-02 2011-08-31 三相電機株式会社 微細気泡発生装置における気液溶解タンク
KR101088145B1 (ko) * 2010-10-06 2011-12-02 이추림 절수형 미세기포 생성장치
KR20120036605A (ko) * 2010-10-08 2012-04-18 (주)참플러스 절수형 미세기포 생성장치
JP5331238B1 (ja) * 2012-11-22 2013-10-30 環境システム株式会社 加圧型オゾン溶解処理装置

Also Published As

Publication number Publication date
JPWO2021225009A1 (fr) 2021-11-11
CN115605285A (zh) 2023-01-13
JP7520471B2 (ja) 2024-07-23
EP4147770A4 (fr) 2024-05-29
WO2021225009A1 (fr) 2021-11-11

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