JP2013066814A - Gas dissolving device - Google Patents

Gas dissolving device Download PDF

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JP2013066814A
JP2013066814A JP2011205156A JP2011205156A JP2013066814A JP 2013066814 A JP2013066814 A JP 2013066814A JP 2011205156 A JP2011205156 A JP 2011205156A JP 2011205156 A JP2011205156 A JP 2011205156A JP 2013066814 A JP2013066814 A JP 2013066814A
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gas
tank
liquid
partition wall
liquid separation
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JP5681910B2 (en
Inventor
Yasunari Maeda
康成 前田
Yoshiyasu Ito
良泰 伊藤
Kyoko Tsutsumi
恭子 堤
Hitoshi Kitamura
仁史 北村
Hisanori Shibata
尚紀 柴田
Tomohiro Akita
朋弘 穐田
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Panasonic Corp
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Panasonic Corp
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Priority to JP2011205156A priority Critical patent/JP5681910B2/en
Priority to KR1020147000788A priority patent/KR101590029B1/en
Priority to CN201280039328.3A priority patent/CN103747856B/en
Priority to PCT/JP2012/067804 priority patent/WO2013042442A1/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • 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
    • 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
    • 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
    • B01F25/421—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 by moving the components in a convoluted or labyrinthine path
    • B01F25/423—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 by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
    • B01F25/4231—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 by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components using baffles

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a gas dissolving device capable of reducing the number of components while securing water-tightness.SOLUTION: A dissolving tank 4 is formed of divided two components of an upper side component 23 and a lower side component 24. In the upper side component, a first partition wall is integrally formed to partition a gas liquid-mixing tank and an intermediate tank, and extends below from the upper surface of the upper side component. In the lower side component, a second partition wall is integrally formed to partition the intermediate tank and gas liquid separation tank, and extends above from the bottom face of the lower side component. A gas circulation pipe which is formed of an elastic body and supplies the gas accumulating in the upper part of the gas liquid separation tank to a fluid flowing in the dissolving tank is held between the upper surface of the upper side component and the upper part of the second partition wall and thereby, a gap therebetween is made to be watertight.

Description

本発明は、水などの溶媒に空気などの気体を溶解させる気体溶解装置に関する。   The present invention relates to a gas dissolving apparatus for dissolving a gas such as air in a solvent such as water.

本出願人は、小型化可能であり、気液分離槽での乱流の発生を抑え、大きな気泡の流出を抑制することのできる気体溶解装置を提案している（特許文献１）。   The present applicant has proposed a gas dissolving device that can be reduced in size, can suppress generation of turbulent flow in a gas-liquid separation tank, and can suppress outflow of large bubbles (Patent Document 1).

特許文献１に記載した気体溶解装置は、第１仕切り壁および第２仕切り壁の２つの仕切り壁によって内部が、液体の流れに関しその上流側から下流側にかけて、気液混合槽、大泡流出防止槽、気液分離槽の順に区画された溶解タンクを備えている。この気体溶解装置では、溶解タンク内に流入する流体が気液混合槽において気体と混合され、気体が溶解した液体が生成され、この液体は、大泡流出防止槽、気液分離槽を順次流れる。   The gas dissolving apparatus described in Patent Document 1 is a gas-liquid mixing tank and a large bubble outflow preventer from the upstream side to the downstream side with respect to the flow of the liquid by the two partition walls of the first partition wall and the second partition wall. The dissolution tank is divided in the order of the tank and the gas-liquid separation tank. In this gas dissolving apparatus, the fluid flowing into the dissolving tank is mixed with the gas in the gas-liquid mixing tank to generate a liquid in which the gas is dissolved, and this liquid sequentially flows through the large bubble outflow prevention tank and the gas-liquid separation tank. .

気液分離槽では、液体に溶解し切れずに残存する気体を気泡として分離する。分離された気泡は、気液分離槽の上部に気体となって次第に溜まっていく。そこで、特許文献１に記載した溶解装置では、溶解タンクの外側を通って溶解タンクの上端部と下端部を接続し、連通させる気体循環経路が設けられている。気体循環経路は、溶解タンク内に貯留する気体を溶解タンクから一旦取り出した後、溶解タンク内に戻して循環させるものであり、溶解タンク内に貯留する気体を液体の生成に再利用し、気体の溶解効率を高める。   In the gas-liquid separation tank, the gas remaining without being completely dissolved in the liquid is separated as bubbles. The separated bubbles gradually accumulate as gas in the upper part of the gas-liquid separation tank. Therefore, the melting apparatus described in Patent Document 1 is provided with a gas circulation path that connects the upper end portion and the lower end portion of the dissolution tank through the outside of the dissolution tank so as to communicate with each other. In the gas circulation path, the gas stored in the dissolution tank is once taken out from the dissolution tank and then returned to the dissolution tank for circulation, and the gas stored in the dissolution tank is reused for liquid generation. To increase the dissolution efficiency.

特開２０１０−２２７７８２号公報JP 2010-227782 A

一方、気体循環経路の接続には、溶解タンク内で生成される液体が漏出しないように水密性が要求される。このため、パッキンなどの水密性を確保する部材の取り付けが必要であり、気体溶解装置の部品点数が多くなるという問題が見出される。   On the other hand, the connection of the gas circulation path requires water tightness so that the liquid generated in the dissolution tank does not leak. For this reason, it is necessary to attach a member that ensures watertightness such as packing, and the problem that the number of parts of the gas dissolving apparatus increases is found.

本発明は、以上のとおりの事情に鑑みてなされたものであり、水密性を確保しつつ、部品点数の減少を図ることのできる気体溶解装置を提供することを課題としている。   This invention is made | formed in view of the above situations, and makes it a subject to provide the gas dissolving apparatus which can aim at the reduction | decrease in a number of parts, ensuring watertightness.

上記の課題を解決するために、本発明の気体溶解装置は、第１仕切り壁および第２仕切り壁の２つの仕切り壁によって内部が、液体の流れに関しその上流側から下流側にかけて、気液混合槽、中間槽、気液分離槽の順に区画された溶解タンクを備え、この溶解タンク内に流入する流体が気液混合槽において気体と混合され、気体が溶解した液体が生成され、この液体は、中間槽、気液分離槽を順次流れ、溶解タンクに設けられた流出部から溶解タンクの外部に流出する気体溶解装置であって、溶解タンクが、２つに分割され、上側の上部品と下側の下部品の２つの部品から形成され、上部品では、気液混合槽と中間槽を区画する第１仕切り壁が一体に形成され、第１仕切り壁は、上部品の上面から下方に延び、下部品では、中間槽と気液分離槽を区画する第２仕切り壁が一体に形成され、第２仕切り壁は、下部品の底面から上方に延びており、気液分離槽の上部に溜まる気体を溶解タンク内に流入する流体に供給する、弾性体から形成された気体循環配管が、上部品の上面と第２仕切り壁の上部との間に挟み込まれ、上部品の上面と第２仕切り壁の上部との間が水密となっていることを特徴とする。  In order to solve the above-mentioned problems, the gas dissolving apparatus of the present invention has a gas-liquid mixing between the first partition wall and the second partition wall from the upstream side to the downstream side with respect to the liquid flow. It has a dissolution tank divided in order of a tank, an intermediate tank, and a gas-liquid separation tank, and the fluid flowing into the dissolution tank is mixed with gas in the gas-liquid mixing tank to generate a liquid in which the gas is dissolved. , A gas dissolution apparatus that sequentially flows through an intermediate tank and a gas-liquid separation tank, and flows out of the dissolution tank from an outflow portion provided in the dissolution tank. The dissolution tank is divided into two parts, The lower part is formed of two parts, and in the upper part, a first partition wall that divides the gas-liquid mixing tank and the intermediate tank is integrally formed, and the first partition wall is formed downward from the upper surface of the upper part. In the lower part, the intermediate tank and gas-liquid separation The second partition wall is integrally formed, and the second partition wall extends upward from the bottom surface of the lower part, and supplies the gas accumulated in the upper part of the gas-liquid separation tank to the fluid flowing into the dissolution tank. The gas circulation pipe formed from the elastic body is sandwiched between the upper surface of the upper part and the upper part of the second partition wall, and the space between the upper surface of the upper part and the upper part of the second partition wall is watertight. It is characterized by that.

この気体溶解装置においては、第２仕切り壁および流出部は、気液分離槽を液体が水平方向に流れるように設けられていることが好ましい。   In this gas dissolving apparatus, it is preferable that the second partition wall and the outflow portion are provided so that the liquid flows in the gas-liquid separation tank in the horizontal direction.

この気体溶解装置においては、第２仕切り壁および流出部は、液体が中間槽の外面に沿って水平方向に流れるように設けられていることが好ましい。   In this gas dissolving apparatus, it is preferable that the second partition wall and the outflow portion are provided so that the liquid flows in the horizontal direction along the outer surface of the intermediate tank.

この気体溶解装置においては、気液分離槽では、気液分離槽の上面より下方に延びる縦リブが設けられていることが好ましい。   In this gas dissolving apparatus, the gas-liquid separation tank is preferably provided with vertical ribs extending downward from the upper surface of the gas-liquid separation tank.

この気体溶解装置においては、第２仕切り壁では、その上部が一部切り欠かれて切欠部が形成され、流出部は、切欠部から離れた位置の気液分離槽の底部に設けられていることが好ましい。   In this gas dissolving apparatus, the upper part of the second partition wall is notched to form a notch, and the outflow part is provided at the bottom of the gas-liquid separation tank at a position away from the notch. It is preferable.

本発明の気体溶解装置によれば、水密性を確保しつつ、部品点数の減少を図ることができる。   According to the gas dissolving apparatus of the present invention, it is possible to reduce the number of parts while ensuring water tightness.

本発明の気体溶解装置の一実施形態を示した正面図である。It is the front view which showed one Embodiment of the gas dissolving apparatus of this invention. 図１に示した気体溶解装置の縦断面図である。It is a longitudinal cross-sectional view of the gas dissolving apparatus shown in FIG. （ａ）（ｂ）（ｃ）は、それぞれ、図２に示した気体溶解装置における溶解タンクのＡ−Ａ断面図、Ｂ−Ｂ断面図、Ｃ−Ｃ断面図である。(A), (b), and (c) are AA sectional drawing, BB sectional drawing, and CC sectional drawing of the dissolution tank in the gas dissolving apparatus shown in FIG. 2, respectively. 図２に示した気体溶解装置における溶解タンクの一部切欠斜視図である。FIG. 3 is a partially cutaway perspective view of a dissolution tank in the gas dissolving apparatus shown in FIG. 2. 縦リブによる気泡の移動抑制について示した模式図である。It is the schematic diagram shown about the bubble movement suppression by a vertical rib. 溶解タンクにおける気体循環配管の周辺を示した一部切欠斜視図である。It is the partially cutaway perspective view which showed the circumference | surroundings of the gas circulation piping in a dissolution tank. 図１に示した気体溶解装置における溶解タンクの分解斜視図である。It is a disassembled perspective view of the dissolution tank in the gas dissolving apparatus shown in FIG. 図１に示した気体溶解装置における溶解タンクの分解斜視図である。It is a disassembled perspective view of the dissolution tank in the gas dissolving apparatus shown in FIG.

図１は、本発明の気体溶解装置の一実施形態を示した正面図である。図２は、図１に示した気体溶解装置の縦断面図である。図３（ａ）（ｂ）（ｃ）は、それぞれ、図２に示した気体溶解装置における溶解タンクのＡ−Ａ断面図、Ｂ−Ｂ断面図、Ｃ−Ｃ断面図である。図４は、図２に示した気体溶解装置における溶解タンクの一部切欠斜視図である。   FIG. 1 is a front view showing an embodiment of the gas dissolving apparatus of the present invention. FIG. 2 is a vertical cross-sectional view of the gas dissolving apparatus shown in FIG. FIGS. 3A, 3B, and 3C are an AA sectional view, a BB sectional view, and a CC sectional view, respectively, of the dissolution tank in the gas dissolving apparatus shown in FIG. FIG. 4 is a partially cutaway perspective view of the dissolution tank in the gas dissolving apparatus shown in FIG.

図１および図２に示したように、気体溶解装置１では、架台２の上にポンプ３が固定され、ポンプ３の上に溶解タンク４が縦置きに取り付けられている。ポンプ３は、水などの溶媒を加圧下に溶解タンク４に送給するものであり、正面に溶媒の吸込部５を備えている。吸込部５は、吸込配管（図示なし）の接続が可能とされている。また、ポンプ３は、上端部に上方に突出する吐出部６を備えている。   As shown in FIGS. 1 and 2, in the gas dissolving apparatus 1, the pump 3 is fixed on the gantry 2, and the dissolution tank 4 is vertically mounted on the pump 3. The pump 3 supplies a solvent such as water to the dissolution tank 4 under pressure, and includes a solvent suction part 5 on the front surface. The suction part 5 can be connected to a suction pipe (not shown). Moreover, the pump 3 is provided with the discharge part 6 which protrudes upwards in an upper end part.

溶解タンク４は、図１に示したように、底部に流入部７を備え、流入部７は、ポンプ３の吐出部６に接続されている。したがって、ポンプ３により送給される溶媒は、溶解タンク４の底部から溶解タンク４内に流入する。また、溶解タンク４は、流入部７と異なる位置の底部に流出部８を備えている。流出部８は、溶解タンク４内で生成される液体が溶解タンク４から流出する部位であり、溶解タンク４の正面側に配置されている。流出部８は、液体を供給先へ供給する流出配管（図示なし）の接続が可能とされている。   As shown in FIG. 1, the dissolution tank 4 includes an inflow portion 7 at the bottom, and the inflow portion 7 is connected to the discharge portion 6 of the pump 3. Therefore, the solvent fed by the pump 3 flows into the dissolution tank 4 from the bottom of the dissolution tank 4. In addition, the dissolution tank 4 includes an outflow portion 8 at the bottom at a position different from the inflow portion 7. The outflow part 8 is a part from which the liquid generated in the dissolution tank 4 flows out of the dissolution tank 4, and is disposed on the front side of the dissolution tank 4. The outflow part 8 can be connected to an outflow pipe (not shown) for supplying the liquid to the supply destination.

また、気体溶解装置１では、縦方向に延びる気体吸引配管９がポンプ３の吸込部５に接続されている。気体吸引配管９は、先端に、気体吸引口１０が形成された気体吸込部１１が接続されている。ポンプ３の作動により生じる負圧によって、溶解タンク４での溶解対象である空気などの気体が、気体吸込部１１の気体吸引口１０から吸引され、気体吸引配管９を通じてポンプ３の吸込部５に送り込まれる。吸込部５に送り込まれた気体は、水などの溶媒中に気泡として混合され、気液混合流体が生成される。この気液混合流体が、流体として吐出部６および流入部７を通じて溶解タンク４内に供給される。   In the gas dissolving device 1, a gas suction pipe 9 extending in the vertical direction is connected to the suction portion 5 of the pump 3. A gas suction pipe 11 having a gas suction port 10 formed at the tip thereof is connected to the gas suction pipe 9. Due to the negative pressure generated by the operation of the pump 3, a gas such as air to be dissolved in the dissolution tank 4 is sucked from the gas suction port 10 of the gas suction unit 11 and is sucked into the suction unit 5 of the pump 3 through the gas suction pipe 9. It is sent. The gas sent to the suction part 5 is mixed as bubbles in a solvent such as water, and a gas-liquid mixed fluid is generated. This gas-liquid mixed fluid is supplied into the dissolution tank 4 through the discharge part 6 and the inflow part 7 as a fluid.

図２に示したように、溶解タンク４の内部には、２つの仕切り壁、すなわち、第１仕切り壁１２および第２仕切り壁１３が設けられ、溶解タンク４の内部は、第１仕切り壁１２および第２仕切り壁１３によって、気液混合槽１４、中間槽１５および気液分離槽１６に区画されている。気液混合槽１４は、溶解タンク４内で生成される液体の流れに関し最も上流側に位置している。中間槽１５は、気液混合槽１４の外側に隣接して配置されている。気液分離槽１６は、液体の流れに関し最も下流側に位置し、中間槽１５の外側に隣接している。   As shown in FIG. 2, two partition walls, that is, a first partition wall 12 and a second partition wall 13 are provided inside the dissolution tank 4, and the interior of the dissolution tank 4 is the first partition wall 12. The gas-liquid mixing tank 14, the intermediate tank 15, and the gas-liquid separation tank 16 are partitioned by the second partition wall 13. The gas-liquid mixing tank 14 is located on the most upstream side with respect to the flow of the liquid generated in the dissolution tank 4. The intermediate tank 15 is disposed adjacent to the outside of the gas-liquid mixing tank 14. The gas-liquid separation tank 16 is located on the most downstream side with respect to the liquid flow, and is adjacent to the outside of the intermediate tank 15.

第１仕切り壁１２および第２仕切り壁１３は、図３（ａ）（ｂ）（ｃ）に示したように、ともに略円筒状の形状を有している。第１仕切り壁１２は、気液混合槽１４と中間槽１５を区画するものであり、図２に示したように、溶解タンク４の上面から下方に延びている。第１仕切り壁１２の下端は、溶解タンク４の底面までは達してなく、溶解タンク４の底面との間に隙間が形成されている。この隙間を液体の流路として気液混合槽１４と中間槽１５は互いに連通している。   As shown in FIGS. 3A, 3B, and 3C, the first partition wall 12 and the second partition wall 13 both have a substantially cylindrical shape. The first partition wall 12 partitions the gas-liquid mixing tank 14 and the intermediate tank 15 and extends downward from the upper surface of the dissolution tank 4 as shown in FIG. A lower end of the first partition wall 12 does not reach the bottom surface of the dissolution tank 4, and a gap is formed between the bottom surface of the dissolution tank 4. The gas-liquid mixing tank 14 and the intermediate tank 15 communicate with each other with this gap as a liquid flow path.

第２仕切り壁１３は、中間槽１５と気液分離槽１６を区画するものであり、溶解タンク４の底面から上方に延びている。第２仕切り壁１３は、気液混合槽１４の周囲をその外側から中間槽１５が包囲するように設けられている。また、第２仕切り壁１３の上部では、図３（ａ）（ｃ）および図４にも示したように、その一部が、断面略円弧状に切り欠かれ、切欠部１７が形成されている。切欠部１７を介して中間槽１５と気液分離槽１６は連通している。切欠部１７は、流出部８と反対側に配置されており、流出部８は、切欠部１７から離れたところに位置している。また、流出部８は、気液分離槽１６の底部に設けられ、気液分離槽１６に連通している。   The second partition wall 13 divides the intermediate tank 15 and the gas-liquid separation tank 16 and extends upward from the bottom surface of the dissolution tank 4. The 2nd partition wall 13 is provided so that the intermediate tank 15 may surround the circumference | surroundings of the gas-liquid mixing tank 14 from the outer side. In addition, as shown in FIGS. 3A and 3C and FIG. 4, a part of the second partition wall 13 is notched in a substantially arc shape in cross section, and a notch portion 17 is formed. Yes. The intermediate tank 15 and the gas-liquid separation tank 16 communicate with each other through the notch 17. The notch 17 is disposed on the opposite side of the outflow part 8, and the outflow part 8 is located away from the notch 17. The outflow part 8 is provided at the bottom of the gas-liquid separation tank 16 and communicates with the gas-liquid separation tank 16.

このような溶解タンク４では、図２に示したように、ポンプ３の作動によって気液混合流体が溶解タンク４に供給されると、気液混合流体は、図１に示した流入部７を通じて気液混合槽１４に、溶解タンク４の底部から上方に向かって噴出する。気液混合流体は、溶解タンク４の上面や第１仕切り壁１２に衝突し、跳ね返り、次第に気液混合槽１４の底部に溜まっていく。また、溶解タンク４の上面や第１仕切り壁１２に衝突し、跳ね返る気液混合流体は、気液混合槽１４に貯留する気液混合流体の液面に衝突し、気液混合流体を撹拌する。このとき、図１に示した気体吸引配管９を通じて混合された気体および気液混合槽１４にあらかじめ貯留していた気体が、水などの溶媒と激しく混合され、また、気液混合流体は撹拌され、気体が溶媒中に加圧下で溶解し、気体が溶解した液体が生成される。これは、撹拌による剪断によって気液混合流体に気泡として混合される気体が細分化され、溶媒と接触する表面積が大きくなり、また、液面付近における気体の溶解濃度が撹拌による均一化によって低減され、気体の溶媒への溶解速度が上昇することによる。   In such a dissolution tank 4, as shown in FIG. 2, when the gas-liquid mixed fluid is supplied to the dissolution tank 4 by the operation of the pump 3, the gas-liquid mixed fluid passes through the inflow portion 7 shown in FIG. The gas-liquid mixing tank 14 is jetted upward from the bottom of the dissolution tank 4. The gas-liquid mixed fluid collides with the upper surface of the dissolution tank 4 and the first partition wall 12, rebounds, and gradually accumulates at the bottom of the gas-liquid mixing tank 14. Further, the gas-liquid mixed fluid that collides with the upper surface of the dissolution tank 4 and the first partition wall 12 and rebounds collides with the liquid level of the gas-liquid mixed fluid stored in the gas-liquid mixing tank 14 to stir the gas-liquid mixed fluid. . At this time, the gas mixed through the gas suction pipe 9 shown in FIG. 1 and the gas previously stored in the gas-liquid mixing tank 14 are vigorously mixed with a solvent such as water, and the gas-liquid mixed fluid is stirred. The gas is dissolved in the solvent under pressure, and a liquid in which the gas is dissolved is generated. This is because the gas mixed as bubbles in the gas-liquid mixed fluid is subdivided by shearing by stirring, the surface area in contact with the solvent is increased, and the dissolved concentration of the gas near the liquid surface is reduced by homogenization by stirring. This is because the dissolution rate of the gas in the solvent increases.

生成した液体は、第１仕切り壁１２の下端と溶解タンク４の底面との間の隙間を通って中間槽１５に流出する。中間槽１５に流出した液体は、図３（ａ）（ｃ）および図４に示したように、第２仕切り壁１３の切欠部１７から越流して気液分離槽１６に流出する。気液分離槽１６は、液体に溶解し切れない気体を気泡として液体から分離する。液体の流れが気液界面である液面付近にまで持ち上げられるので、気泡は、浮力によって上方へ移動する。一方、気液分離槽１６に流出した液体は、そのような気泡の上昇を妨げない方向に流れる。図３（ｂ）および図４に示したように、液体は、気液分離槽１６を水平方向に流れる。この液体の水平方向の流れは、中間槽１５の外面に沿ったものとなり、気液分離槽１６を水平方向に流れる液体は、流出部８から溶解タンク４の外部に流出する。流出部８は、気液分離槽１６の底部に設けられているので、液面付近に存在する大きな気泡の流出が抑制される。   The generated liquid flows out to the intermediate tank 15 through a gap between the lower end of the first partition wall 12 and the bottom surface of the dissolution tank 4. As shown in FIGS. 3A and 3C and FIG. 4, the liquid flowing out into the intermediate tank 15 overflows from the notch 17 of the second partition wall 13 and flows out into the gas-liquid separation tank 16. The gas-liquid separation tank 16 separates gas that cannot be dissolved in the liquid from the liquid as bubbles. Since the liquid flow is lifted to the vicinity of the liquid surface, which is the gas-liquid interface, the bubbles move upward by buoyancy. On the other hand, the liquid that has flowed out into the gas-liquid separation tank 16 flows in a direction that does not prevent such bubbles from rising. As shown in FIGS. 3B and 4, the liquid flows in the gas-liquid separation tank 16 in the horizontal direction. The horizontal flow of the liquid is along the outer surface of the intermediate tank 15, and the liquid flowing in the horizontal direction in the gas-liquid separation tank 16 flows out of the dissolution tank 4 from the outflow portion 8. Since the outflow part 8 is provided in the bottom part of the gas-liquid separation tank 16, the outflow of the big bubble which exists in the liquid level vicinity is suppressed.

このように、溶解タンク４では、第２仕切り壁１３および流出部８が、気液分離槽１６を液体が水平方向に流れるように設けられているのであり、したがって、溶解タンク４のより一層の小型化が可能であり、特に縦方向のサイズを小さくすることができる。また、第２仕切り壁１３および流出部８は、液体が中間槽１５の外面に沿って水平方向に流れるように設けられているので、縦方向のサイズの短縮化に有効となる。しかも、流出部８が中間槽１５の切欠部１７から離れた位置に設けられているので、気液分離のための距離を長くとることができ、気泡の上昇時間を長くすることができる。液体が気液分離槽１６を水平方向に流れることで、流れている間に未溶解の気体を液体から分離することができ、気液分離を効率よく行うことができる。このため、未溶解の気体が流出部８から溶解タンク４の外部に流出するのを抑制することができる。   Thus, in the dissolution tank 4, the second partition wall 13 and the outflow part 8 are provided so that the liquid flows in the gas-liquid separation tank 16 in the horizontal direction. Miniaturization is possible, and in particular, the size in the vertical direction can be reduced. Further, since the second partition wall 13 and the outflow portion 8 are provided so that the liquid flows in the horizontal direction along the outer surface of the intermediate tank 15, it is effective for shortening the size in the vertical direction. And since the outflow part 8 is provided in the position away from the notch part 17 of the intermediate tank 15, the distance for gas-liquid separation can be taken long and the rising time of a bubble can be lengthened. Since the liquid flows in the gas-liquid separation tank 16 in the horizontal direction, the undissolved gas can be separated from the liquid while flowing, and the gas-liquid separation can be performed efficiently. For this reason, it is possible to suppress the undissolved gas from flowing out of the dissolution tank 4 from the outflow portion 8.

また、溶解タンク４では、第２仕切り壁１３が、気液混合槽１４の周囲をその外側から中間槽１５が包囲するように設けられているので、液体生成時に発生しやすい騒音を抑制することができる。さらに、第１仕切り壁１２および第２仕切り壁１３は円筒状の形状を有しているので、液体の流れが均質化され、溶解タンク４のより一層の小型化に有効ともなる。   In the dissolution tank 4, the second partition wall 13 is provided so that the intermediate tank 15 surrounds the gas-liquid mixing tank 14 from the outside, thereby suppressing noise that is likely to occur during liquid generation. Can do. Furthermore, since the first partition wall 12 and the second partition wall 13 have a cylindrical shape, the flow of the liquid is homogenized, which is effective for further downsizing of the dissolution tank 4.

また、図３（ａ）（ｃ）および図４に示したように、気液分離槽１６では、気液分離槽１６の上面より下方に延びる縦リブ１８が設けられている。縦リブ１８は、小片状に形成され、液体が流れる方向に間隔をあけて３つ設けられている。   As shown in FIGS. 3A and 3C and FIG. 4, the gas-liquid separation tank 16 is provided with vertical ribs 18 extending downward from the upper surface of the gas-liquid separation tank 16. The vertical ribs 18 are formed in small pieces, and three are provided at intervals in the direction in which the liquid flows.

図５は、縦リブによる気泡の移動抑制について示した模式図である。   FIG. 5 is a schematic diagram showing bubble movement suppression by vertical ribs.

気液分離槽１６において液体内を上方に移動する気泡１９は、縦リブ１８によって、液体が流れる水平方向への移動が規制される。気泡１９は、縦リブ１８の長さ方向に上昇することができるのみであり、このように上昇する複数の気泡１９は次第に合体する。縦リブ１８は、気泡１９の合体を促進させるものでもある。このため、未溶解の気体が液体から効率よく分離され、大きな気泡が気液分離槽１６から流出部８へと流出するのを抑制することができる。合体した気泡１９は、液面に達すると割れ、未溶解の気体は、気液分離槽１６の上部に溜まる。このように気液分離槽１６の上部に溜まる気体を溶解タンク４から排出するために、溶解タンク４の気液分離槽１６の上部には、図２および図４に示したように、気体放出弁２０が設けられている。   The bubbles 19 moving upward in the liquid in the gas-liquid separation tank 16 are restricted by the vertical ribs 18 from moving in the horizontal direction in which the liquid flows. The bubbles 19 can only rise in the longitudinal direction of the longitudinal ribs 18, and the plurality of bubbles 19 that rise in this way gradually merge. The vertical ribs 18 also promote the coalescence of the bubbles 19. For this reason, undissolved gas can be efficiently separated from the liquid, and large bubbles can be prevented from flowing out from the gas-liquid separation tank 16 to the outflow portion 8. The combined bubbles 19 break when reaching the liquid level, and the undissolved gas accumulates in the upper part of the gas-liquid separation tank 16. In order to discharge the gas accumulated in the upper part of the gas-liquid separation tank 16 from the dissolution tank 4, the gas is discharged to the upper part of the gas-liquid separation tank 16 of the dissolution tank 4 as shown in FIGS. A valve 20 is provided.

気体放出弁２０は、気液分離槽１６における液体の液面の高さに追随して浮沈し、上下方向に移動可能なフロート（図示なし）を有している。液体の液面の高さの変化にともないフロートが上下動することによって、気体放出弁２０は、気液分離槽１６に貯留する気体の放出と停止を行う。   The gas release valve 20 has a float (not shown) that floats and sinks following the liquid level in the gas-liquid separation tank 16 and is movable in the vertical direction. As the float moves up and down as the liquid level changes, the gas release valve 20 releases and stops the gas stored in the gas-liquid separation tank 16.

また、溶解タンク４では、気液分離槽１６の上部に溜まる気体を再利用するために、図２および図３（ａ）（ｂ）（ｃ）に示したように、気体循環配管２１が設けられてもいる。   Further, in the dissolution tank 4, a gas circulation pipe 21 is provided as shown in FIGS. 2, 3 (a), (b), and (c) in order to reuse the gas accumulated in the upper part of the gas-liquid separation tank 16. There is also.

図６は、溶解タンクにおける気体循環配管の周辺を示した一部切欠斜視図である。   FIG. 6 is a partially cutaway perspective view showing the periphery of the gas circulation pipe in the dissolution tank.

図６に示したように、気体循環配管２１は中間槽１５の内部を上下方向に設けられ、下端は、溶解タンク４の流入部７に接続されている。気体循環配管２１の上端部は、図３（ｃ）に示したように、第２仕切り壁１３に沿って略円弧状に湾曲し、水平に配置されている。気体循環配管２１は、ゴムなどの弾性体から形成されている。図２に示したように、気体循環配管２１の上端部は、溶解タンク４の上面と第２仕切り壁１３の上部との間に配置され、パッキンとしても機能する。   As shown in FIG. 6, the gas circulation pipe 21 is provided inside the intermediate tank 15 in the vertical direction, and the lower end is connected to the inflow portion 7 of the dissolution tank 4. As shown in FIG. 3C, the upper end portion of the gas circulation pipe 21 is curved in a substantially arc shape along the second partition wall 13 and is disposed horizontally. The gas circulation pipe 21 is formed of an elastic body such as rubber. As shown in FIG. 2, the upper end portion of the gas circulation pipe 21 is disposed between the upper surface of the dissolution tank 4 and the upper portion of the second partition wall 13 and also functions as a packing.

気体が溶解した液体の生成時には、気体循環配管２１の上端付近と下端付近の間に圧力差が生じる。気体循環配管２１の上端付近の圧力は下端付近の圧力よりも高い。また、図６に示した流入部７では、気液混合流体の流速が速いため、減圧されている。したがって、気液分離槽１６の上部に溜まる未溶解の気体は、気体循環配管２１の上端から吸引され、下端から流入部７に供給される。流入部７に送り込まれた気体は、再度気液混合流体に混合され、気液混合槽１４において溶媒中に溶解する。このように、溶解タンク４では、気液分離槽１６の上部に溜まる気体を溶解タンク４内に流入する気液混合流体に供給する気体循環配管２１が設けられているので、未溶解の気体の再利用が可能であり、気体の溶解効率が向上する。   When the liquid in which the gas is dissolved is generated, a pressure difference is generated between the vicinity of the upper end and the vicinity of the lower end of the gas circulation pipe 21. The pressure near the upper end of the gas circulation pipe 21 is higher than the pressure near the lower end. Moreover, in the inflow part 7 shown in FIG. 6, since the flow velocity of a gas-liquid mixed fluid is quick, it is pressure-reduced. Therefore, the undissolved gas accumulated in the upper part of the gas-liquid separation tank 16 is sucked from the upper end of the gas circulation pipe 21 and supplied to the inflow portion 7 from the lower end. The gas sent to the inflow portion 7 is mixed with the gas-liquid mixed fluid again and dissolved in the solvent in the gas-liquid mixing tank 14. As described above, the dissolution tank 4 is provided with the gas circulation pipe 21 that supplies the gas accumulated in the upper part of the gas-liquid separation tank 16 to the gas-liquid mixed fluid flowing into the dissolution tank 4. It can be reused, and gas dissolution efficiency is improved.

なお、気体循環配管２１は、中間槽１５の内部に限らず、気液分離槽１６の内部に設けることも可能である。気液分離槽１６の内部に設けても、気体循環配管２１は、中間槽１５の内部に設ける場合と同様に機能する。また、溶解タンク４の上部には、図１に示したように、下り勾配の傾斜面部２２が形成されている。傾斜面部２２によって、気液分離槽１６の上部に溜まる気体は、溶解タンク４の中央部寄りに集められ、気体循環配管２１の上端からの気体の吸引はスムーズに行われ、気体を流入部７に効率よく供給することができる。   The gas circulation pipe 21 is not limited to the inside of the intermediate tank 15 but can be provided inside the gas-liquid separation tank 16. Even if it is provided inside the gas-liquid separation tank 16, the gas circulation pipe 21 functions in the same manner as when it is provided inside the intermediate tank 15. Further, as shown in FIG. 1, a downwardly inclined surface portion 22 is formed in the upper part of the dissolution tank 4. The gas accumulated in the upper portion of the gas-liquid separation tank 16 is collected near the central portion of the dissolution tank 4 by the inclined surface portion 22, and the gas is smoothly sucked from the upper end of the gas circulation pipe 21. Can be supplied efficiently.

上記のとおりの溶解タンク４は、図１および図２に示したように、縦方向の中央部において２つに分割され、上側の上部品２３と下側の下部品２４の２つの部品から形成されている。   As shown in FIGS. 1 and 2, the dissolution tank 4 as described above is divided into two parts at the center in the vertical direction, and is formed from two parts, an upper part 23 on the upper side and a lower part 24 on the lower side. Has been.

図７は、図１に示した気体溶解装置における溶解タンクの分解斜視図である。図８は、図１に示した気体溶解装置における溶解タンクの分解斜視図である。図７、図８では、溶解タンクを異なる方向から図示している。   FIG. 7 is an exploded perspective view of a dissolution tank in the gas dissolving apparatus shown in FIG. FIG. 8 is an exploded perspective view of the dissolution tank in the gas dissolving apparatus shown in FIG. 7 and 8, the dissolution tank is illustrated from different directions.

図７および図８に示したように、上部品２３では、第１仕切り壁１２が一体に形成され、第１仕切り壁１２は、上部品２３の上面から下方に延びている。下部品２４では、第２仕切り壁１３が一体に形成され、第２仕切り壁１３は、下部品２４の底面から上方に延びている。下部品２４には、底部に流入部７および流出部８が一体に設けられている。上部品２３の下端縁部および下部品２４の上端縁部には、外側方に突出して延びるフランジ部２５、２６が設けられている。溶解タンク４は、フランジ部２５、２６を重ね合わせ、重なり合うフランジ部２５、２６の所定の部位においてボルト、ナットなどの適宜な固着具により上部品２３と下部品２４を締結することによって組み立てられ、一体となる。この組み立て時に、第１仕切り壁１２が第２仕切り壁１３の内側に挿入され、気液混合槽１４、中間槽１５および気液分離槽１６が形成される。また、図３（ｃ）に示した弾性体から形成された気体循環配管２１の上端部が、図２に示したように、上部品２３の上面と第２仕切り壁１３の上部との間に挟み込まれる。この気体循環配管２１の挟み込みによって、気体循環配管２１がパッキンとして機能し、上部品２３の上面と第２仕切り壁１３の上部との間が水密となる。このため、液体が、第２仕切り壁１３の切欠部１７以外の部分において中間槽１５から気液分離槽１６へ流出するのを抑制することができる。このような上部品２３の上面と第２仕切り壁１３の上部との間の水密性が、気液分離槽１６の上部に溜まる気体を溶解タンク４に供給する気体循環配管２１により実現されているので、溶解タンク４は、部品点数が減少したものとなっている。   As shown in FIGS. 7 and 8, in the upper part 23, the first partition wall 12 is integrally formed, and the first partition wall 12 extends downward from the upper surface of the upper part 23. In the lower part 24, the second partition wall 13 is integrally formed, and the second partition wall 13 extends upward from the bottom surface of the lower part 24. The lower part 24 is integrally provided with the inflow portion 7 and the outflow portion 8 at the bottom. At the lower end edge of the upper part 23 and the upper end edge of the lower part 24, flange parts 25 and 26 are provided to protrude outward. The dissolution tank 4 is assembled by overlapping the flange parts 25 and 26 and fastening the upper part 23 and the lower part 24 with appropriate fasteners such as bolts and nuts at predetermined portions of the overlapping flange parts 25 and 26, Become one. At the time of this assembly, the first partition wall 12 is inserted inside the second partition wall 13, and the gas-liquid mixing tank 14, the intermediate tank 15, and the gas-liquid separation tank 16 are formed. Further, the upper end portion of the gas circulation pipe 21 formed of the elastic body shown in FIG. 3C is located between the upper surface of the upper part 23 and the upper portion of the second partition wall 13 as shown in FIG. It is caught. By sandwiching the gas circulation pipe 21, the gas circulation pipe 21 functions as a packing, and the space between the upper surface of the upper part 23 and the upper part of the second partition wall 13 becomes watertight. For this reason, it can suppress that a liquid flows out into the gas-liquid separation tank 16 from the intermediate tank 15 in parts other than the notch part 17 of the 2nd partition wall 13. FIG. Such watertightness between the upper surface of the upper part 23 and the upper part of the second partition wall 13 is realized by the gas circulation pipe 21 that supplies the gas accumulated in the upper part of the gas-liquid separation tank 16 to the dissolution tank 4. Therefore, the dissolution tank 4 has a reduced number of parts.

本発明は、以上の実施形態によって限定されるものではない。ポンプおよび架台の構成や構造、気体放出弁の構成や構造などの細部については様々な態様が可能である。   The present invention is not limited to the above embodiments. Various aspects are possible about details, such as a structure and structure of a pump and a mount frame, and a structure and structure of a gas discharge valve.

１ 気体溶解装置
４ 溶解タンク
８ 流出部
１２ 第１仕切り壁
１３ 第２仕切り壁
１４ 気液混合槽
１５ 中間槽
１６ 気液分離槽
１７ 切欠部
１８ 縦リブ
２１ 気体循環配管
２３ 上部品
２４ 下部品 DESCRIPTION OF SYMBOLS 1 Gas dissolution apparatus 4 Dissolution tank 8 Outflow part 12 1st partition wall 13 2nd partition wall 14 Gas-liquid mixing tank 15 Intermediate tank 16 Gas-liquid separation tank 17 Notch part 18 Vertical rib 21 Gas circulation piping 23 Upper part 24 Lower part

Claims (5)

第１仕切り壁および第２仕切り壁の２つの仕切り壁によって内部が、液体の流れに関しその上流側から下流側にかけて、気液混合槽、中間槽、気液分離槽の順に区画された溶解タンクを備え、この溶解タンク内に流入する流体が気液混合槽において気体と混合され、気体が溶解した液体が生成され、この液体は、前記中間槽、前記気液分離槽を順次流れ、前記溶解タンクに設けられた流出部から溶解タンクの外部に流出する気体溶解装置であって、
前記溶解タンクが、２つに分割され、上側の上部品と下側の下部品の２つの部品から形成され、前記上部品では、前記気液混合槽と前記中間槽を区画する前記第１仕切り壁が一体に形成され、第１仕切り壁は、前記上部品の上面から下方に延び、前記下部品では、前記中間槽と前記気液分離槽を区画する前記第２仕切り壁が一体に形成され、第２仕切り壁は、前記下部品の底面から上方に延びており、
前記気液分離槽の上部に溜まる気体を前記溶解タンク内に流入する前記流体に供給する、弾性体から形成された気体循環配管が、前記上部品の上面と前記第２仕切り壁の上部との間に挟み込まれ、前記上部品の上面と前記第２仕切り壁の上部との間が水密となっている
ことを特徴とする気体溶解装置。 The dissolution tank is divided into a gas-liquid mixing tank, an intermediate tank, and a gas-liquid separation tank in this order from the upstream side to the downstream side with respect to the flow of the liquid by the two partition walls of the first partition wall and the second partition wall. The fluid flowing into the dissolution tank is mixed with gas in the gas-liquid mixing tank, and a liquid in which the gas is dissolved is generated. The liquid flows in the intermediate tank and the gas-liquid separation tank in order, and the dissolution tank A gas dissolving device that flows out of the dissolution tank from an outflow portion provided in
The dissolution tank is divided into two parts, and is formed of two parts, an upper part on the upper side and a lower part on the lower side. In the upper part, the first partition that divides the gas-liquid mixing tank and the intermediate tank A wall is integrally formed, and the first partition wall extends downward from the upper surface of the upper part. In the lower part, the second partition wall that partitions the intermediate tank and the gas-liquid separation tank is integrally formed. The second partition wall extends upward from the bottom surface of the lower part,
A gas circulation pipe formed of an elastic body for supplying the gas accumulated in the upper part of the gas-liquid separation tank to the fluid flowing into the dissolution tank includes an upper surface of the upper part and an upper part of the second partition wall. A gas dissolving apparatus, wherein the gas dissolving apparatus is sandwiched between the upper parts and the upper part of the second partition wall. 前記第２仕切り壁および前記流出部は、前記気液分離槽を前記液体が水平方向に流れるように設けられていることを特徴とする請求項１に記載の気体溶解装置。   The gas dissolution apparatus according to claim 1, wherein the second partition wall and the outflow portion are provided so that the liquid flows in the gas-liquid separation tank in a horizontal direction. 前記第２仕切り壁および前記流出部は、前記液体が前記中間槽の外面に沿って水平方向に流れるように設けられていることを特徴とする請求項２に記載の気体溶解装置。   The gas dissolving apparatus according to claim 2, wherein the second partition wall and the outflow portion are provided so that the liquid flows in a horizontal direction along an outer surface of the intermediate tank. 前記気液分離槽では、気液分離槽の上面より下方に延びる縦リブが設けられていることを特徴とする請求項１から３のいずれか一項に記載の気体溶解装置。   The gas dissolving apparatus according to any one of claims 1 to 3, wherein the gas-liquid separation tank is provided with vertical ribs extending downward from an upper surface of the gas-liquid separation tank. 前記第２仕切り壁では、その上部が一部切り欠かれて切欠部が形成され、前記流出部は、前記切欠部から離れた位置の前記気液分離槽の底部に設けられていることを特徴とする請求項１から４のいずれか一項に記載の気体溶解装置。   The upper part of the second partition wall is partially cut away to form a notch, and the outflow part is provided at the bottom of the gas-liquid separation tank at a position away from the notch. The gas dissolving device according to any one of claims 1 to 4.
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