JP2670492B2 - Gas-liquid dissolving and mixing equipment - Google Patents
Gas-liquid dissolving and mixing equipmentInfo
- Publication number
- JP2670492B2 JP2670492B2 JP5234173A JP23417393A JP2670492B2 JP 2670492 B2 JP2670492 B2 JP 2670492B2 JP 5234173 A JP5234173 A JP 5234173A JP 23417393 A JP23417393 A JP 23417393A JP 2670492 B2 JP2670492 B2 JP 2670492B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- liquid
- mixing
- cross
- nozzle
- 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.)
- Expired - Fee Related
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
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
-
- 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
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
-
- 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
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
- B01F25/4521—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through orifices in elements, e.g. flat plates or cylinders, which obstruct the whole diameter of the tube
Description
【０００１】[0001]
【産業上の利用分野】この発明は、液体中に気体を混合
分散させたり、気体を効率よく液体に溶解させるための
気液溶解混合装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid dissolving and mixing apparatus for mixing and dispersing a gas in a liquid and efficiently dissolving the gas in the liquid.
【０００２】[0002]
【従来の技術】本願出願人の特願平４−１４８７６９号
等による従来の気液溶解混合装置は、図７に示すよう
に、液体中に気体を混合する混合器１０を有し、この混
合器１０の流入部１３に液体管路の先端部が取り付けら
れている。混合器１０内には、図７に示すように、絞り
部であるのど部１２が中央部に設けられたベンチュリ管
状の流路１４が形成されている。このベンチュリ管状の
流路１４の下流側には、テーパ状に滑らかに形成された
広がり部１６が設けられ、のど部１２からわずかに下流
側の広がり部１６のテーパ面には、気体を流路１４中に
混合させるための気体流入口１８が形成されている。そ
して、広がり部１６の下流側には、気体流入口１８から
流入した気体と流路中の液体とを混合する図示しない混
合部が設けられている。2. Description of the Related Art A conventional gas-liquid dissolving / mixing apparatus disclosed in Japanese Patent Application No. 4-148769 of the present applicant has a mixer 10 for mixing a gas into a liquid as shown in FIG. The tip of the liquid conduit is attached to the inflow portion 13 of the container 10. Inside the mixer 10, as shown in FIG. 7, a venturi-shaped flow path 14 is formed in which a throat portion 12 which is a throttle portion is provided in the central portion. On the downstream side of the venturi-shaped flow path 14, there is provided a widened portion 16 that is smoothly formed in a tapered shape, and a gas is flowed on the tapered surface of the widened portion 16 slightly downstream from the throat portion 12. A gas inlet 18 for mixing in 14 is formed. A mixing portion (not shown) that mixes the gas flowing from the gas inlet 18 with the liquid in the flow path is provided on the downstream side of the spreading portion 16.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の装置では、
気体流入口１８が、広がり部１６のテーパ面に形成され
ているため、気体流入口１８の形成箇所の広がり部１６
の断面積のうち、のど部１２側断面積と混合部側断面積
とが異なったものになり気体の吸引流入が不安定になる
という問題があった。また、混合部での加圧は、混合部
側断面の断面積に依存し、断面積が大きくなると加圧が
低くなる傾向にあり、逆に、吸引気体量は、のど部１２
側の断面の断面積に依存し断面積が大きいと多くなる傾
向があるため、気体を高加圧で高吸引することが難しか
った。さらに、混合部が大容量化すればするほど、全体
の液流量に対する気体流量の割合が小さくなる。そのた
め、混合部を大容量化した際に気体が吸引不足となり、
気体吸引量が体積比で２０％以上で高加圧下に維持した
場合、気液混合流の流量は、４０リットル／ｍｉｎ前後
が限界だった。In the above-mentioned conventional apparatus,
Since the gas inlet port 18 is formed on the tapered surface of the expanding portion 16, the expanding portion 16 at the location where the gas inlet port 18 is formed.
There was a problem that the throat 12 side cross-sectional area and the mixing section side cross-sectional area of the cross-sectional area became different from each other and the suction and inflow of gas became unstable. Further, the pressurization in the mixing section depends on the cross-sectional area of the cross section on the mixing section side, and when the cross-sectional area increases, the pressurization tends to decrease.
It depends on the cross-sectional area of the cross section on the side, and the larger the cross-sectional area, the larger the cross-sectional area. Furthermore, the larger the volume of the mixing section, the smaller the ratio of the gas flow rate to the total liquid flow rate. Therefore, when the volume of the mixing section is increased, the gas becomes insufficient to suck,
When the amount of gas suction was 20% or more in volume ratio and maintained under high pressure, the flow rate of the gas-liquid mixed flow was limited to around 40 liters / min.
【０００４】さらに、従来の方式では、混合器１０の製
作の際に、広がり部１６に正確なテーパを形成し、広が
り部１６の正確な位置に気体流入口１８用の穴を開ける
必要があるため、その加工が非常に難しいものであっ
た。Further, in the conventional method, when the mixer 10 is manufactured, it is necessary to form an accurate taper on the expanded portion 16 and to make a hole for the gas inlet 18 at an accurate position of the expanded portion 16. Therefore, the processing was very difficult.
【０００５】この発明は、上記従来技術の問題点に鑑み
て成されたもので、簡単な構成で、効率よく気体と液体
との混合が可能であり、安定に大量の気液混合流を得る
ことができる気液溶解混合装置を提供することを目的と
する。The present invention has been made in view of the above-mentioned problems of the prior art. It is possible to efficiently mix a gas and a liquid with a simple structure and stably obtain a large amount of gas-liquid mixed flow. An object of the present invention is to provide a gas-liquid dissolving and mixing device that can be used.
【０００６】[0006]
【課題を解決するための手段】この発明は、流路に設け
られたベンチュリ管やオリフィス等の絞り部と、この絞
り部に続いて下流側に設けられ液体流路方向に断面積の
等しい気体流入部を設け、この気体流入部に外部から気
体を流入させる気体流入口を形成し、上記気体流入部の
下流側に流路を徐々に広げた広がり部を設け、上記広が
り部の下流に流路中の液体と上記気体流入部の気体圧力
より高い静圧下で加圧混合する混合部と、この混合部の
出口側に設けられたノズルとを備え、上記気体流入部の
断面積は上記混合部の断面積より小さく、このノズルの
ノズル孔の断面積の総和を、上記混合部の断面積よりも
小さく且つ上記気体流入部での上記液体の静圧が上記気
体流入口から流入する気体の圧力より低くなるように設
定した気液溶解混合装置である。さらに、上記気体流入
部の上記液体の流れ方向の長さは、上記絞り部から出た
上記液体が広がって壁面に当たるまでの長さ以下に設定
されている。さらに、上記気体流入部と、上記ノズル口
の断面積の総和の関係は、Ｓ Ａ が気体流入部の断面積、
Ｓ Ｂ はノズル口の断面積の総和、Ｐ １ は気体流入部の総
圧、δＰは気体流入部からノズル口までの圧力損失、Ｐ
Ｂ はノズル口の出口の静圧、Ｐ Ｇ が気体流入口から流入
する気体の圧力とすると、Ｐ Ａ は流体力学上の連続の式
及びベルヌーイの定理と連続の式による以下の式 Ｐ Ａ ＝（１−Ｓ 2 B ／Ｓ 2 A ）Ｐ １ ＋（δＰ＋Ｐ Ｂ ）Ｓ 2 B ／Ｓ 2 A によって与えられる気体流入部での液体の静圧であり、 Ｐ Ａ とＰ Ｇ が、Ｐ Ａ ＜Ｐ Ｇ を満たすものである The present invention is directed to a throttle portion such as a Venturi tube or an orifice provided in a flow passage, and a gas provided downstream of the throttle portion and having a uniform cross-sectional area in the liquid flow passage direction. An inflow portion is provided, a gas inflow port for inflowing gas from the outside is formed in the gas inflow portion, and a widened portion that gradually widens the flow path is provided on the downstream side of the gas inflow portion and flows downstream of the widened portion. Liquid pressure in the channel and gas pressure at the gas inlet
A mixing section for pressurizing and mixing under a higher static pressure and a nozzle provided on the outlet side of the mixing section are provided , and the gas inflow section
The cross-sectional area is smaller than that of the mixing part,
The total cross-sectional area of the nozzle hole is
The static pressure of the liquid at the gas inlet is small and
Set it so that it is lower than the pressure of the gas flowing from the body inlet.
It is a fixed gas-liquid dissolution mixing device. In addition, the gas inflow
The length of the part in the flow direction of the liquid comes out from the throttle part.
Set below the length until the above liquid spreads and hits the wall surface
Have been . Furthermore, the gas inflow part and the nozzle port
Relationship of the sum of the cross-sectional area of the cross-sectional area of S A is the gas inlet portion,
S B is the sum of the cross-sectional areas of the nozzle port, P 1 is the total of the gas inflow part
Pressure, δP is the pressure loss from the gas inlet to the nozzle port, P
B is the static pressure at the outlet of the nozzle, and P G is flowing in from the gas inlet
P A is a continuum of fluid dynamics
And follows the Bernoulli's theorem by continuity equation equation P A = (1-S 2 B / S 2 A) P 1 + (δP + P B) of the liquid at the gas inflow portion provided by S 2 B / S 2 A Static pressure, P A and P G satisfy P A <P G
【０００７】[0007]
【作用】この発明の気液溶解混合装置は、ベンチュリ管
ののど部等の絞り部のわずか下流側の負圧部から気体を
液体の流れの中に流入させ、流れが遅くなり静圧が増大
する混合部で流入した気体を液体中に加圧溶解させ、そ
の後、出口のノズルによって、上記気液混合流を加速さ
せて再び静圧を低くし、溶解した気体を微小気泡として
液体中から析出させるものである。さらに、流入する気
体の条件によりノズルを気液混合流が通過する際に、流
れの乱れにより混合した気泡をせん断し細分化して微小
気泡を発生させるようにしたものである。特に、気体流
入口が流路方向に断面積が一定の気体流入部に形成さ
れ、安定に効率よく気体が液体中に吸引されるものであ
る。In the gas-liquid dissolving and mixing apparatus of the present invention, the gas is introduced into the liquid flow from the negative pressure portion slightly downstream of the throttle portion such as the throat portion of the Venturi tube, and the flow becomes slow and the static pressure increases. The gas flowing in the mixing section is dissolved under pressure in the liquid, and then the gas-liquid mixed flow is accelerated by the nozzle at the outlet to lower the static pressure again, and the dissolved gas is precipitated from the liquid as fine bubbles. It is what makes me. In addition, the inflow
When the gas-liquid mixed flow passes through the nozzle depending on the body condition,
Due to the turbulence, the mixed bubbles are sheared and subdivided into minute pieces.
It is designed to generate bubbles. In particular, the gas inflow port is formed in the gas inflow part having a constant cross-sectional area in the flow path direction, and the gas is sucked into the liquid stably and efficiently.
【０００８】[0008]
【実施例】以下この発明の気液溶解混合装置の実施例に
ついて図面に基づいて説明する。図１、図２はこの発明
の第一実施例を示すもので、図１に示すように、この実
施例の気液溶解混合装置は、液体中に気体を混合する混
合器２０を有し、この混合器２０の入口部２３に図示し
ない液体管路の先端部が取り付けられている。混合器２
０内には、図１に示すように、絞り部であるのど部２２
が中央部に設けられたベンチュリ管状の流路２４が形成
されている。このベンチュリ管状の流路２４の下流側に
は、のど部２２よりわずかに内径が大きい円筒状の気体
流入部２７が形成され、この気体流入部２７の下流側
に、滑らかにテーパ状に広がった広がり部２６が形成さ
れている。そして、この気体流入部２７には、気体を流
路２４中に混合させるための気体流入口２８が形成され
ている。気体流入口２８には、所定の気体を導く図示し
ない気体流入管路の先端部が接続されている。ここで、
のど部２２から噴出してきた液体の流れは、のど部２２
を通過後の後コーン状に拡大するため、気体流入部２７
の長さには制限がある。即ち、のど部２２から流れが所
定の角度で広がり、その流れが気体流入部２７の壁面に
当たるまでの長さが最大値であると言える。実験的に
は、のど部２２と気体流入部２７との段差ａと平行部の
流さｂの関係は、次の式、 ｂ＜９．５ａ を満たすものであれば安定して気体を吸引することが判
明している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas-liquid dissolving and mixing apparatus of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. As shown in FIG. 1, the gas-liquid dissolving and mixing apparatus of this embodiment has a mixer 20 for mixing a gas into a liquid, At the inlet 23 of the mixer 20, a tip end of a liquid conduit (not shown) is attached. Mixer 2
As shown in FIG. 1, the inside of 0 is a throat portion 22 which is a throttle portion.
A venturi-shaped flow path 24 having a central part is formed. A cylindrical gas inflow portion 27 having an inner diameter slightly larger than that of the throat portion 22 is formed on the downstream side of the venturi-shaped flow path 24, and is smoothly tapered in a downstream side of the gas inflow portion 27. A widened portion 26 is formed. The gas inflow portion 27 is formed with a gas inflow port 28 for mixing the gas into the flow path 24. The gas inlet 28 is connected to the tip of a gas inflow conduit (not shown) that guides a predetermined gas. here,
The flow of liquid ejected from the throat portion 22 is
After passing through the gas, the gas inflow part 27
Is limited in length. That is, it can be said that the length of the flow from the throat portion 22 spreading at a predetermined angle and reaching the wall surface of the gas inlet portion 27 is the maximum value. Experimentally, the relationship between the level difference a between the throat portion 22 and the gas inflow portion 27 and the flow rate b in the parallel portion should satisfy the following equation: b <9.5a Is known.
【０００９】広がり部２６の下流側には、気体流入口２
８から流入した気体と流路中の液体とを混合する混合部
３０が設けられている。混合部３０は、その外径を加圧
の程度に合わせて任意に設定し得るものであり、ここで
は広がり部２６の最大径よりわずかに広い内径の円筒状
に形成されている。この混合部３０の先端には、複数の
ノズル口３２が形成されたノズル３４が取り付けられて
いる。そして、ノズル３４は、所定の液体が収容された
水槽等の底部に接続され、ノズル口３２が液体内で開口
している。On the downstream side of the expanding portion 26, the gas inlet 2
A mixing unit 30 that mixes the gas flowing from 8 and the liquid in the flow path is provided. The outer diameter of the mixing portion 30 can be arbitrarily set according to the degree of pressurization, and here, the mixing portion 30 is formed in a cylindrical shape having an inner diameter slightly wider than the maximum diameter of the spreading portion 26. A nozzle 34 having a plurality of nozzle openings 32 is attached to the tip of the mixing section 30. The nozzle 34 is connected to the bottom of a water tank or the like containing a predetermined liquid, and the nozzle port 32 is open in the liquid.
【００１０】この実施例の気液溶解混合装置の作用につ
いて以下に説明する。先ず、混合器２０の入口部２３に
流入した液体は、ベンチュリ管ののど部２２で加速され
て、一端静圧が低くなり気体流入部２７、広がり部２６
を経て流速が遅くなり再び静圧が増大する。この時、気
体流入部２７に設けられた気体流入口２８は、のど部２
２の直下流であり、この部分は相対的に負圧になってい
るため、気体が気体流入口２８より流路中に流入する。The operation of the gas-liquid dissolving and mixing apparatus of this embodiment will be described below. First, the liquid that has flowed into the inlet portion 23 of the mixer 20 is accelerated in the throat portion 22 of the Venturi tube, and once the static pressure becomes low, the gas inflow portion 27 and the widening portion 26 are reduced.
After that, the flow velocity decreases and the static pressure increases again. At this time, the gas inflow port 28 provided in the gas inflow part 27 has the throat portion 2
It is immediately downstream of 2, and since this portion has a relatively negative pressure, gas flows into the flow path from the gas inlet 28.
【００１１】気体流入口２８から流入した気体は、気泡
となって流路中を液体とともに混合部３０に流れ、混合
部３０の静圧がのど部２２より高いのでその気体が液体
中に溶解していく。そして混合部３０からノズル口３２
を経て気泡とともに液体が噴射される。ノズル口３２を
気液混合流が通過する際には、再び加速されるので、そ
の静圧が低くなり、液体中に溶解していた気体が微小気
泡として析出する。さらに溶解しきらなかった気泡も、
ノズル口３２で加速される際の流れの乱れに等により、
細分化され小さな気泡となって液体とともに噴射され
る。The gas flowing in from the gas inlet 28 flows as bubbles into the mixing section 30 together with the liquid in the flow path, and since the static pressure of the mixing section 30 is higher than that of the throat section 22, the gas is dissolved in the liquid. To go. From the mixing section 30 to the nozzle port 32
Then, the liquid is ejected together with the bubbles. When the gas-liquid mixed flow passes through the nozzle port 32, it is accelerated again, so that the static pressure becomes low, and the gas dissolved in the liquid is deposited as fine bubbles. In addition, air bubbles that have not completely dissolved,
Due to the turbulence of the flow when accelerated by the nozzle port 32,
It is subdivided into small bubbles that are ejected together with the liquid.
【００１２】この発明の混合器２０の気体流入部２７
と、ノズル３４のノズル口３２の断面積の総和の関係は
以下の式（１）、（２）を満たすものであれば良い。 ＰA＜ＰG …（１） ＰGは気体流入口２８から流入する気体の圧力。ＰAは流
体力学上の連続の式及びベルヌーイの定理と連続の式に
よる以下の式によって与えられる気体流入部２７での液
体の静圧である。 ＰA＝（１−Ｓ 2 B ／Ｓ 2 A）Ｐ１＋（δＰ＋ＰＢ）Ｓ 2 B ／Ｓ 2 A …（２） ここで、ＳAは気体流入部２７の断面積、ＳBはノズル口
３２の断面積の総和、Ｐ1は気体流入部２７の総圧、δ
Ｐは気体流入部２７からノズル口３２までの圧力損失、
ＰBはノズル口３２の出口の静圧である。The gas inlet 27 of the mixer 20 of the present invention
And the total sum of the cross-sectional areas of the nozzle openings 32 of the nozzles 34 may satisfy the following expressions (1) and (2). P A <P G (1) P G is the pressure of the gas flowing from the gas inlet 28. P A is the liquid in the gas inflow part 27 given by the following equation based on the continuity equation and Bernoulli's theorem and the continuity equation in fluid mechanics.
The static pressure of the body . P A = (1-S 2 B / S 2 A ) P 1 + (δP + P B ) S 2 B / S 2 A (2) where S A is the cross-sectional area of the gas inflow portion 27 and S B is the nozzle. The total cross-sectional area of the mouth 32, P 1 is the total pressure of the gas inflow portion 27, δ
P is the pressure loss from the gas inlet 27 to the nozzle port 32,
P B is the static pressure at the outlet of the nozzle port 32.
【００１３】従って、上記式（１）、（２）を満たす様
に気体流入部２７及びノズル口３２の内径を設定するこ
とにより、液体中に気体を効率的に混合し溶解させる最
適な条件が得られるものである。また、混合部３０は、
加圧下で液体に気体が溶解し飽和するまでの気液の接触
時間が得られるものであればより好ましく、気液の接触
時間は混合部の体積に依存するので、混合部の長さがあ
る程度長い方が気体が飽和点にまで溶解する。Therefore, by setting the inner diameters of the gas inflow portion 27 and the nozzle port 32 so as to satisfy the above equations (1) and (2), the optimum conditions for efficiently mixing and dissolving the gas in the liquid are obtained. Is what you get. Also, the mixing unit 30
It is more preferable if the contact time of gas-liquid until the gas is dissolved and saturated in the liquid under pressure can be obtained. Since the contact time of gas-liquid depends on the volume of the mixing part, the length of the mixing part is to some extent. The longer the gas is, the more it dissolves to the saturation point.
【００１４】この実施例の気液溶解混合装置により、混
合部３０の処理流量が１６０リットル／ｍｉｎで試験を
したところ、液体流量に対して気体体積が２０％以上の
割合で混合した、高吸引高加圧状態を得ることができ
た。従って、従来のものよりも飛躍的に処理流量が増大
したことが証明された。The gas-liquid dissolving and mixing apparatus of this example was tested at a processing flow rate of the mixing section 30 of 160 liters / min. As a result, it was found that the gas volume was 20% or more of the liquid flow rate, and high suction A high pressure state could be obtained. Therefore, it was proved that the processing flow rate was dramatically increased as compared with the conventional one.
【００１５】次にこの発明の第二実施例について図３を
基にして説明する。ここで、上述の実施例と同様の部材
は同一符号を付して説明を省略する。この実施例の気液
溶解混合装置は、上記第一実施例の混合部として、図３
に示すように、上から下に液体が流れ落ちる流路３８を
形成した気液混合槽４０を設けたものである。従って、
流路３８の入口部には混合器２０が取り付けられ、流路
３８の出口部管路４３を介してノズル４４が設けられて
いるものである。Next, a second embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. The gas-liquid dissolving and mixing apparatus of this embodiment has the same structure as that of the mixing unit of the first embodiment shown in FIG.
As shown in FIG. 3, a gas-liquid mixing tank 40 having a flow path 38 from which liquid flows down is provided. Therefore,
The mixer 20 is attached to the inlet of the flow path 38, and the nozzle 44 is provided via the outlet line 43 of the flow path 38.
【００１６】この実施例の気液混合槽４０は、緩急を繰
り返しながら段階的に液体が上から下に向う流路３８を
有し、この流路３８に気液混合流を流すことにより、流
路３８内では、その上部に気体、下部に液体が流れる状
態になり、気液の接触面積が広い流れが得られるもので
ある。そして、緩急を繰り返しながら段階的に上から下
に流れ落ちる流路３８の出口部の管路４３の先端にノズ
ル４４を設けることによって、この流路３８内部の静圧
を高め、気液の反応、溶解効率を高めるものである。ま
た、気液混合流の流入管路の入り口より出口の流出管路
４３の位置が低いため、流路３８内に気液混合流が滞る
形になり、さらに、流路３８において、密度の大きい液
体の方が気体よりも流出が容易になるため、気体が液体
よりも流路３８内により多く滞り、流入の段階では比較
的気体の比率が低い場合であっても、流路３８内では気
体の比率が高いものとなる。このため、気液混合槽４０
内部で、高効率な気体溶解が行われる。The gas-liquid mixing tank 40 of this embodiment has a flow path 38 in which the liquid flows from top to bottom in a stepwise manner while repeating the steepness and steepness. In the passage 38, a gas flows in the upper part and a liquid flows in the lower part, so that a flow having a wide contact area of gas and liquid can be obtained. By providing a nozzle 44 at the end of the conduit 43 at the outlet of the flow path 38 that flows down gradually from top to bottom while repeating acceleration and deceleration, the static pressure inside the flow path 38 is increased, and the gas-liquid reaction, It improves the dissolution efficiency. Further, since the position of the outflow conduit 43 at the outlet is lower than the inlet of the inflow conduit of the gas-liquid mixed flow, the gas-liquid mixed flow is stagnant in the flow channel 38, and further, the density of the flow in the flow channel 38 is large. Since the liquid is easier to flow out than the gas, the gas stays in the flow channel 38 more than the liquid, and even if the ratio of the gas is relatively low at the inflow stage, the gas flows in the flow channel 38. The ratio of is high. Therefore, the gas-liquid mixing tank 40
Inside, highly efficient gas dissolution is performed.
【００１７】次にこの発明の第三実施例について図４を
基にして説明する。ここで、上述の実施例と同様の部材
は同一符号を付して説明を省略する。この実施例では、
より微細な気泡のみを得るために、混合部で溶解しきら
なかった気泡を、ノズル３４のノズル口３２でせん断す
るのではなくて、ノズル３４の手前の分岐点４５から上
方を向いて設けられた分岐路４６より、余剰気体として
外部に放出しているものである。これにより析出した気
泡だけを液中に放出することができ、より微細な気泡を
有した液体のみを製造することができる。Next, a third embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this example,
In order to obtain only finer bubbles, the bubbles that have not been completely dissolved in the mixing portion are provided not by shearing at the nozzle port 32 of the nozzle 34 but by facing upward from the branch point 45 in front of the nozzle 34. The excess gas is discharged to the outside from the branch passage 46. As a result, only the precipitated bubbles can be discharged into the liquid, and only the liquid having finer bubbles can be manufactured.
【００１８】次にこの発明の第四実施例について図５を
基にして説明する。ここで、上述の実施例と同様の部材
は同一符号を付して説明を省略する。この実施例は、混
合器から気液混合流が送り込まれる配管４７，４８の間
に、中間ノズル５０を設けたものである。この配管４
７，４８は、気液の混合部を兼ねるものであり、鋼管や
フレキシブルな管路でもよく、流れが乱流になる方がよ
り効率良く気体と液体が混合されるので、その管路を螺
旋状に設定したり、管路のレイノルズ数を乱流になる値
以上の条件に設定しても良い。Next, a fourth embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, an intermediate nozzle 50 is provided between the pipes 47 and 48 into which the gas-liquid mixed flow is sent from the mixer. This piping 4
7 and 48 also serve as a gas-liquid mixing section, and may be a steel pipe or a flexible pipe line. Since gas and liquid are mixed more efficiently when the flow becomes turbulent, the pipe line is spiraled. Alternatively, the Reynolds number of the conduit may be set to a value equal to or larger than a value that causes turbulence.
【００１９】次にこの発明の第五実施例について図６を
基にして説明する。ここで、上述の実施例と同様の部材
は同一符号を付して説明を省略する。この実施例は、混
合器６０の広がり部５６が段階的に形成されたものであ
る。これにより、気体流入部２７及び広がり部５６の加
工がきわめて容易なものとなり、より生産効率の良いも
のとなる。また、広がり部５６の段数は任意に設定出来
るものであり、少なくとも混合部３０までに１段以上形
成されていれば良い。さらに、段階的に広がる広がり部
５６及び気体流入部２７の各段差部は、所定角度傾斜し
た面に形成しても良い。Next, a fifth embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the expanding portion 56 of the mixer 60 is formed stepwise. As a result, the processing of the gas inflow portion 27 and the widening portion 56 becomes extremely easy, and the production efficiency becomes higher. Further, the number of steps of the spreading portion 56 can be set arbitrarily, and it is sufficient that at least one step is formed by the mixing portion 30. Further, each stepped portion of the expanding portion 56 and the gas inflow portion 27 that gradually expand may be formed on a surface inclined by a predetermined angle.
【００２０】尚、この発明の気液溶解混合装置の混合器
の絞り部は、ベンチュリ管により形成したものや、オリ
フィス状に急激に絞ったものでも良く、その形状は問わ
ないものである。さらに、ノズルの形状やノズル口の数
も所定の条件に一致させて適宜設定できるものである。The throttle portion of the mixer of the gas-liquid dissolving / mixing device of the present invention may be formed by a Venturi tube or may be sharply throttled into an orifice shape, and its shape is not limited. Further, the shape of the nozzle and the number of nozzle ports can be set appropriately in accordance with predetermined conditions.
【００２１】[0021]
【発明の効果】この発明の気液溶解混合装置は、簡単な
装置で微細な気泡を連続的に安定して効率よく形成する
ことができ、液体中に吸引する気体の高加圧、高吸引状
態を得ることができ、最大処理流量も従来のものの数倍
以上とすることができる。また、装置の製作においても
混合器の加工が容易な構造である。The gas-liquid dissolving and mixing apparatus of the present invention is capable of continuously and efficiently forming fine bubbles with a simple apparatus, and highly pressurizes and sucks gas to be sucked into a liquid. The state can be obtained, and the maximum processing flow rate can be made several times higher than the conventional one. In addition, the structure is such that the mixer can be easily processed when manufacturing the device.
【図１】この発明の気液溶解混合装置の第一実施例の混
合器を示す縦断面図である。FIG. 1 is a vertical cross-sectional view showing a mixer of a first embodiment of a gas-liquid dissolving and mixing apparatus of the present invention.
【図２】この発明の第一実施例の気液溶解混合装置の混
合器の部分拡大断面図である。FIG. 2 is a partially enlarged cross-sectional view of the mixer of the gas-liquid dissolution mixing device according to the first embodiment of the present invention.
【図３】この発明の第二実施例の気液溶解混合装置の混
合槽の縦断面図である。FIG. 3 is a vertical cross-sectional view of a mixing tank of a gas-liquid dissolution mixing device according to a second embodiment of the present invention.
【図４】この発明の第三実施例の気液溶解混合装置のノ
ズル部分の部分縦断面図である。FIG. 4 is a partial vertical sectional view of a nozzle portion of a gas-liquid dissolving and mixing apparatus according to a third embodiment of the present invention.
【図５】この発明の第四実施例の気液溶解混合装置の中
間ノズル部分の部分縦断面図である。FIG. 5 is a partial vertical sectional view of an intermediate nozzle portion of a gas-liquid dissolving / mixing device according to a fourth embodiment of the present invention.
【図６】この発明の第五実施例の気液溶解混合装置の混
合器の縦断面図である。FIG. 6 is a vertical cross-sectional view of a mixer of a gas-liquid dissolution mixing device according to a fifth embodiment of the present invention.
【図７】この発明の従来技術の混合器の縦断面図であ
る。FIG. 7 is a vertical cross-sectional view of a prior art mixer of the present invention.
１０，２０，６０ 混合器 １２，２２ のど部 １４，２４，３８ 流路 １６，２６，５６ 広がり部 １８，２８ 気体流入口 ３０ 混合部 ２７ 気体流入部 ３２ ノズル口 ３４ ノズル 10, 20, 60 Mixer 12, 22 Throat 14, 24, 38 Flow path 16, 26, 56 Expanding section 18, 28 Gas inlet 30 Mixing section 27 Gas inflow section 32 Nozzle port 34 Nozzle
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柏 雅一 大阪府大阪市淀川区三国本町１丁目10番 40号 和泉電気株式会社内 (56)参考文献 特開 平６−285344（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masakazu Kashiwa 1-10-40 Mikunihonmachi, Yodogawa-ku, Osaka-shi, Izumi Electric Co., Ltd. (56) Reference JP-A-6-285344 (JP, A)
Claims (5)
につづいてこの絞り部よりわずかに内径が大きく所定長
さ断面積が一定に形成された気体流入部と、この気体流
入部に続いて設けられ下流側に向かって流路を広げた広
がり部と、上記気体流入部に設けられた気体流入口と、
上記広がり部の下流に設けられ流路中の液体と上記気体
流入口から流入した気体とを上記気体流入部の気体圧力
より高い静圧下で加圧混合する混合部と、この混合部の
出口側に設けられたノズルとを備え、上記気体流入部の
断面積を上記混合部の断面積より小さく形成し、上記ノ
ズルのノズル口の断面積の総和を、上記混合部の断面積
よりも小さく且つ上記気体流入部での上記液体の静圧が
上記気体流入口から流入する気体の圧力より低くなるよ
うに設定したことを特徴とする気液溶解混合装置。1. A throttle portion provided in a flow path, a gas inlet portion which is formed next to the throttle portion and has an inner diameter slightly larger than that of the throttle portion and has a constant cross-sectional area of a predetermined length, and the gas inlet portion. A widened portion that is provided subsequent to and widened the flow path toward the downstream side, and a gas inlet provided in the gas inflow portion,
The gas pressure of the gas inflow part is defined by the liquid in the flow path provided downstream of the spread part and the gas flowing in from the gas inflow port.
A mixing section for pressurizing and mixing under a higher static pressure and a nozzle provided on the outlet side of the mixing section are provided , and the gas inflow section
Make the cross-sectional area smaller than the cross-sectional area of the mixing section, and
The sum of the cross-sectional area of the nozzle nozzle of the slu
And the static pressure of the liquid at the gas inlet is less than
It will be lower than the pressure of the gas flowing from the gas inlet.
A gas-liquid dissolving and mixing device characterized by being set as follows .
長さは、上記絞り部から出た上記液体が広がって壁面に
当たるまでの長さ以下であることを特徴とする請求項１
記載の気液溶解混合装置。2. The flow direction of the liquid in the gas inflow part
The length of the liquid spread from the throttle is
The length is less than or equal to the time of hitting.
The gas-liquid dissolution mixing device described.
積の総和の関係は、Ｓ Ａ が気体流入部の断面積、Ｓ Ｂ は
ノズル口の断面積の総和、Ｐ １ は気体流入部の総圧、δ
Ｐは気体流入部からノズル口までの圧力損失、Ｐ Ｂ はノ
ズル口の出口の静圧、Ｐ Ｇ が気体流入口から流入する気
体の圧力とすると、 Ｐ Ａ は流体力学上の連続の式及びベルヌーイの定理と連
続の式による以下の式 Ｐ Ａ ＝（１−Ｓ 2 B ／Ｓ 2 A ）Ｐ １ ＋（δＰ＋Ｐ Ｂ ）Ｓ 2 B ／Ｓ 2 A によって与えられる気体流入部での液体の静圧であり、 Ｐ Ａ とＰ Ｇ が、Ｐ Ａ ＜Ｐ Ｇ を満たすものである ことを特徴とする請求項１記載の気
液溶解混合装置。3. A cross section of the gas inlet and the nozzle opening.
The relationship of the sum of products is that S A is the cross-sectional area of the gas inflow part and S B is
The total cross-sectional area of the nozzle port, P 1 is the total pressure of the gas inflow part, δ
P is the pressure loss from the gas inlet to the nozzle port, and P B is
Static pressure at the outlet of the sluice, the gas P G flowing from the gas inlet
Given the pressure of the body, P A is related to the equation of continuity in hydrodynamics and Bernoulli's theorem.
Is the static pressure of the liquid at the gas inlet given by the following equation P A = (1-S 2 B / S 2 A ) P 1 + (δP + P B ) S 2 B / S 2 A according to the following equation : P a and P G is the gas-liquid dissolving and mixing apparatus according to claim 1, wherein a satisfies the P a <P G.
を繰り返す形状に形成されていることを特徴とする請求
項１，２又は３記載の気液溶解混合装置。4. The gas-liquid dissolving and mixing apparatus according to claim 1, wherein the mixing section has a flow path formed in a shape that gradually and gradually repeats.
接続された管路から成ることを特徴とする請求項１，
２，又は３記載の気液溶解混合装置。5. The mixing section comprises a pipe line connected to a downstream side of the expanding section.
The gas-liquid dissolution mixing device according to the item 2 or 3.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5234173A JP2670492B2 (en) | 1993-08-26 | 1993-08-26 | Gas-liquid dissolving and mixing equipment |
| CN93114861A CN1049845C (en) | 1993-01-22 | 1993-11-10 | Method and apparatus for dissolution and mixture of gas and liquid |
| KR1019930024053A KR0173996B1 (en) | 1993-01-22 | 1993-11-12 | Apparatus for dissolving a gas into and mixing the same with a liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5234173A JP2670492B2 (en) | 1993-08-26 | 1993-08-26 | Gas-liquid dissolving and mixing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0760088A JPH0760088A (en) | 1995-03-07 |
| JP2670492B2 true JP2670492B2 (en) | 1997-10-29 |
Family
ID=16966817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5234173A Expired - Fee Related JP2670492B2 (en) | 1993-01-22 | 1993-08-26 | Gas-liquid dissolving and mixing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2670492B2 (en) |
Cited By (3)
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| JP2792016B2 (en) | 1994-05-31 | 1998-08-27 | 和泉電気株式会社 | Gas-liquid dissolving and mixing equipment |
| JP2792015B2 (en) | 1994-05-20 | 1998-08-27 | 和泉電気株式会社 | Gas dissolution equipment |
| JP2003112024A (en) * | 2001-10-04 | 2003-04-15 | Cyber Techno:Kk | Apparatus for producing ozone water |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8906483D0 (en) * | 1989-03-21 | 1989-05-04 | Boc Group Plc | Dissolution of gas |
| JPH03267135A (en) * | 1990-03-16 | 1991-11-28 | Masami Marusawa | Gas-liquid mixing device |
-
1993
- 1993-08-26 JP JP5234173A patent/JP2670492B2/en not_active Expired - Fee Related
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|---|---|---|---|---|
| JP2792015B2 (en) | 1994-05-20 | 1998-08-27 | 和泉電気株式会社 | Gas dissolution equipment |
| JP2792016B2 (en) | 1994-05-31 | 1998-08-27 | 和泉電気株式会社 | Gas-liquid dissolving and mixing equipment |
| JP2003112024A (en) * | 2001-10-04 | 2003-04-15 | Cyber Techno:Kk | Apparatus for producing ozone water |
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|---|---|
| JPH0760088A (en) | 1995-03-07 |
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