JP4979096B2 - Carbon dioxide gas recovery device - Google Patents

Carbon dioxide gas recovery device Download PDF

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JP4979096B2
JP4979096B2 JP2010193163A JP2010193163A JP4979096B2 JP 4979096 B2 JP4979096 B2 JP 4979096B2 JP 2010193163 A JP2010193163 A JP 2010193163A JP 2010193163 A JP2010193163 A JP 2010193163A JP 4979096 B2 JP4979096 B2 JP 4979096B2
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carbon dioxide
dioxide gas
water
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suction
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JP2011240322A (en
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康名 横井
義展 伊藤
利明 加藤
昌史 竹田
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Anlet Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、発電所、製鉄所や焼却炉などから排出される二酸化炭素（ＣＯ２）ガスを、ルーツポンプにより吸入される水に混合させて水中に放出し溶存させることにより回収を行なう二酸化炭素ガス回収装置に関する。 The present invention recovers carbon dioxide (CO 2 ) gas discharged from a power plant, ironworks, incinerator, etc. by mixing it with water sucked by a roots pump, releasing it into water and dissolving it. The present invention relates to a gas recovery device.

地球温暖化現象の要因とされる温室効果ガスとしての二酸化炭素ガスについては、最近の首脳レベルの外交の場や国際会議でしばしば採り上げられている。化石燃料を多量に消費する先進国においては、京都議定書等で決められる温室効果ガスの排出削減、排出抑制目標をいかにして達成するかが大きな課題となっている。   Carbon dioxide gas, which is considered to be a cause of global warming, is often taken up at recent diplomatic sites and international conferences. In developed countries that consume large amounts of fossil fuels, how to achieve greenhouse gas emission reduction and emission control targets determined by the Kyoto Protocol is a major issue.

特許文献１には、製鉄所等から排出される二酸化炭素を分離回収する装置と、その装置で回収した二酸化炭素を地中若しくは海中に固定化する装置を有し、二酸化炭素を分離回収する装置は、高炉ガスから化学吸収液で二酸化炭素を吸収するための設備と、二酸化炭素を吸収した化学吸収液から化学吸収液再生用の熱源を利用して二酸化炭素を分離し化学吸収液を再生するための設備を備えた二酸化炭素の分離回収装置が開示されている。   Patent Document 1 includes an apparatus for separating and recovering carbon dioxide discharged from a steel plant and the like, and an apparatus for fixing the carbon dioxide recovered by the apparatus in the ground or in the sea, and separating and recovering carbon dioxide. Uses carbon dioxide to absorb carbon dioxide from blast furnace gas with chemical absorption liquid, and separates carbon dioxide from chemical absorption liquid that has absorbed carbon dioxide using a heat source for chemical absorption liquid regeneration to regenerate the chemical absorption liquid. Disclosed is a carbon dioxide separation and recovery device equipped with a facility for this purpose.

また、特許文献２には、低濃度の二酸化炭素が溶融炭酸塩を利用して電気化学的に濃縮・分離されることにより、排出ガス中に含まれる硫化物、塩化物、ＮＯＸ等の不純物を含まない高純度で高濃度の二酸化炭素を回収する二酸化炭素濃縮方法及び装置が開示されている。 In Patent Document 2, since the low concentration of carbon dioxide is electrochemically enriched and separated by using a molten carbonate, sulfide contained in the exhaust gas, chloride, impurities such as NO X Disclosed is a carbon dioxide concentration method and apparatus for recovering high-purity and high-concentration carbon dioxide that does not contain water.

上記従来の二酸化炭素を分離回収し固定化する装置や二酸化炭素濃縮装置においては、何れも大規模の設備となって設備コストが多大となると思われる。   In the conventional apparatus for separating and recovering and fixing carbon dioxide and the carbon dioxide concentrating apparatus, it is considered that all of them are large-scale facilities and the equipment cost is increased.

特許第４２３１７３５号公報Japanese Patent No. 4231735 特許第４３８５４２４号公報Japanese Patent No. 4385424

本発明の目的は、発電所、製鉄所などから排出される二酸化炭素ガスの回収を低コストで簡易に行なうことができる小型の二酸化炭素ガス回収装置を提供することにある。   An object of the present invention is to provide a small-sized carbon dioxide gas recovery device that can easily recover carbon dioxide gas discharged from a power plant, an ironworks, or the like at low cost.

前記目的を達成するために請求項１に記載した発明は、化石燃料の燃焼時に発生する二酸化炭素ガスを回収する二酸化炭素ガス回収装置であって、
吸込口と吐出口を設けたポンプケーシング内に収められた一対のルーツロータを駆動モータにより回転自在に設けたルーツポンプと、その吸込口に接続される吸入管と、その吐出口に接続される排出管とを備え、その吸入管に連通する管路には二酸化炭素ガスの導入口と、吸い込んだ水と二酸化炭素ガスを内蔵された衝突部材に衝突させる気泡発生管とを設け、その衝突部材は、該気泡発生管の大径部の内底に載せられるリングから上方へ延びる脚の上端に円形板を一体に固定した形態とされ、
前記ルーツポンプの運転により前記吸入管から水を吸い込むと共に前記導入口から取り込まれる温室効果ガスとしての二酸化炭素ガスが混入した水を前記気泡発生管の衝突部材に衝突させることにより多量の気泡を発生させ、かつ、前記ルーツポンプによる圧縮作用によって気泡を微細化し、その微細化された二酸化炭素ガスの気泡を含む水を前記排出管から水中に放出することによって二酸化炭素ガスを水中に溶存させることを特徴とするものである。 In order to achieve the above object, the invention described in claim 1 is a carbon dioxide gas recovery device that recovers carbon dioxide gas generated during combustion of fossil fuel,
A roots pump in which a pair of roots rotors housed in a pump casing provided with a suction port and a discharge port are rotatably provided by a drive motor, a suction pipe connected to the suction port, and a discharge connected to the discharge port A pipe that communicates with the suction pipe is provided with a carbon dioxide gas inlet, and a bubble generating pipe that collides the sucked water and the carbon dioxide gas into a collision member that is built in. The circular plate is integrally fixed to the upper end of the leg extending upward from the ring placed on the inner bottom of the large diameter portion of the bubble generating tube,
A large amount of bubbles are generated by sucking water from the suction pipe by the operation of the roots pump and colliding with the collision member of the bubble generation pipe with water mixed with carbon dioxide gas as a greenhouse gas taken in from the introduction port. And by making the bubbles fine by the compression action of the Roots pump, and discharging the water containing the fined carbon dioxide gas bubbles from the discharge pipe into the water, the carbon dioxide gas is dissolved in the water. It is a feature.

（請求項１の発明）
この二酸化炭素ガス回収装置は、ルーツポンプの運転により温室効果ガスとしての二酸化炭素ガスが混合した水を気泡発生管に内蔵された衝突部材に衝突させることにより多量の気泡を発生させ、かつ、ルーツポンプによる圧縮作用によって気泡を微細化し、その二酸化炭素ガスの気泡を含む水を水中に放出することによって二酸化炭素ガスを水中に効率よく溶存させることができる。 (Invention of Claim 1)
This carbon dioxide gas recovery device generates a large amount of bubbles by causing water mixed with carbon dioxide gas as a greenhouse gas to collide with a collision member built in a bubble generation tube by operating a roots pump. The bubbles can be made fine by the compression action by the pump, and the water containing the bubbles of the carbon dioxide gas can be discharged into the water, so that the carbon dioxide gas can be efficiently dissolved in the water.

加えて、この装置は小型で設備費用が安く、発電所、製鉄所などから排出される二酸化炭素ガスの回収を低コストで簡易に行なうことができる。   In addition, this apparatus is small in size and inexpensive in equipment cost, and can easily recover carbon dioxide gas discharged from a power plant, a steel mill or the like at a low cost.

本発明に係る二酸化炭素ガス回収装置Carbon dioxide gas recovery apparatus according to the present invention ルーツポンプの内部構造図Roots pump internal structure diagram ルーツポンプの一部破断側面図Roots pump partially broken side view 気泡発生管の説明図Illustration of bubble generation tube 本発明に係る二酸化炭素ガス回収装置を用いた実験装置Experimental apparatus using carbon dioxide gas recovery apparatus according to the present invention 実験１の二酸化炭素ガス溶存量の測定結果を示すグラフThe graph which shows the measurement result of the carbon dioxide gas dissolved amount of Experiment 1 実験２の二酸化炭素ガス溶存量の測定結果を示すグラフThe graph which shows the measurement result of the carbon dioxide gas dissolved amount of experiment 2 実験３の二酸化炭素ガス溶存量の測定結果を示すグラフ（１）The graph which shows the measurement result of the carbon dioxide gas dissolved amount of Experiment 3 (1) 実験３の二酸化炭素ガス溶存量の測定結果を示すグラフ（２）Graph (2) showing measurement results of dissolved amount of carbon dioxide gas in Experiment 3

以下に、本発明の最良の形態例を図面に基づいて説明する。   The best mode of the present invention will be described below with reference to the drawings.

本発明に係る二酸化炭素ガス回収装置Ｃは、発電所、製鉄所などから排出される二酸化炭素ガスを微細化気泡として河川等の水中に放出することにより二酸化炭素ガスを水に効率よく溶存させる機能を有する。この装置には、ルーツポンプ３と、その吸込口５に接続される吸入管４５と、その吐出口６に接続される排出管５５を備えている。 The carbon dioxide gas recovery device C according to the present invention has a function of efficiently dissolving carbon dioxide gas in water by releasing carbon dioxide gas discharged from a power plant, ironworks, etc. into water such as a river as fine bubbles. Have This apparatus includes a Roots pump 3, a suction pipe 45 connected to the suction port 5, and a discharge pipe 55 connected to the discharge port 6.

図１に示すように、二酸化炭素ガス回収装置Ｃの機台１上にはルーツポンプ３と駆動モータ３８とが設置されている。ルーツポンプ３は、図２に示すように、吸込口５と吐出口６を設けたポンプケーシング４の内部に、吸込口部８を斜め上方に、吐出口部９を斜め下方に設けたロータケーシング７が４５度傾けて配置されている。ロータケーシング７の吸込口部８の上隅部７ａとポンプケーシング４の吸込口５側の天部４ａとは、壁１０により連接されている。また、吐出口部９の下隅部７ｂから横方向へ凹円弧壁１１が一体に形成され、その凹円弧壁１１のほぼ中間部とポンプケーシング４の底部４ｂとは、縦壁１２により連接されている。１３は縦壁１２に設けられたバイパス穴である。このバイパス穴１３はポンプケーシング４内の水を循環可能とするために設けられている。   As shown in FIG. 1, a roots pump 3 and a drive motor 38 are installed on the machine base 1 of the carbon dioxide gas recovery apparatus C. As shown in FIG. 2, the Roots pump 3 has a rotor casing in which a suction port 8 is provided obliquely upward and a discharge port 9 is provided obliquely downward in a pump casing 4 provided with a suction port 5 and a discharge port 6. 7 is inclined at 45 degrees. The upper corner 7 a of the suction port 8 of the rotor casing 7 and the top 4 a on the suction port 5 side of the pump casing 4 are connected by a wall 10. Further, a concave arc wall 11 is integrally formed laterally from the lower corner portion 7b of the discharge port portion 9, and a substantially middle portion of the concave arc wall 11 and the bottom portion 4b of the pump casing 4 are connected by a vertical wall 12. Yes. Reference numeral 13 denotes a bypass hole provided in the vertical wall 12. This bypass hole 13 is provided so that the water in the pump casing 4 can be circulated.

１４，１４はポンプケーシング４の周壁に設けられたドレン用穴、１５はポンプケーシング４の天部４ａに設けられた給水穴である。１７は一方のドレン用穴１４に螺着されたキャップ、２１は給水穴１５に螺着されたキャップである。他方のドレン用穴１４に螺着されるキャップ１８には、前記バイパス穴１３に先端部を挿入するロッド１９が中心部に突設されている。   14 and 14 are drain holes provided in the peripheral wall of the pump casing 4, and 15 is a water supply hole provided in the top portion 4 a of the pump casing 4. A cap 17 is screwed into one drain hole 14, and a cap 21 is screwed into the water supply hole 15. The cap 18 that is screwed into the other drain hole 14 is provided with a rod 19 that protrudes into the bypass hole 13 at the center.

吸込口５には、逆止弁２２を介装して配管のためのフランジ金具２３が取り付けられている。また、吐出口６にも同様に、フランジ金具２４が取り付けられている。 A flange fitting 23 for piping is attached to the suction port 5 via a check valve 22. Similarly, a flange fitting 24 is attached to the discharge port 6.

ロータケーシング７には、一対の２葉式ルーツロータ２６を収めている。図３に示すように、ルーツロータ２６のロータ軸２７は、ポンプケーシング４の両側に夫々固定されたハウジング３０，３１に装着したベアリング３２，３２により回転自由に支持するように設けられている。下方のロータ軸２７のハウジング３０から突出する一端にはプーリ３４を取付け、駆動モータ装置３８により伝動ベルト３９を介して該プーリ３４を回転駆動するように設けられている。ロータ軸２７の他端にはタイミングギア３５を夫々固定し、それらのタイミングギア３５，３５を噛合するように設けている。３６はハウジング３１の開口部に取り付けたギアカバーである。   The rotor casing 7 accommodates a pair of two-leaf root rotors 26. As shown in FIG. 3, the rotor shaft 27 of the Roots rotor 26 is provided so as to be freely supported by bearings 32, 32 attached to housings 30, 31 fixed to both sides of the pump casing 4. A pulley 34 is attached to one end of the lower rotor shaft 27 protruding from the housing 30, and the pulley 34 is rotationally driven by a drive motor device 38 via a transmission belt 39. A timing gear 35 is fixed to the other end of the rotor shaft 27, and the timing gears 35 are engaged with each other. Reference numeral 36 denotes a gear cover attached to the opening of the housing 31.

ハウジング３０，３１には、ロータ軸２７を支持するベアリング３２の奥に、公知のメカニカルシールを収納したスタッフィングボックス３３が設けられている。   The housings 30 and 31 are provided with a stuffing box 33 in which a well-known mechanical seal is accommodated behind a bearing 32 that supports the rotor shaft 27.

ルーツロータ２６については、ロータ軸２７を除いて形成された芯金部２６ｂの外側にポリウレタンゴム材（又はニトリルゴム材）によりライニング加工を施している。 About the roots rotor 26, the outer side of the metal core part 26b formed except the rotor shaft | axis 27 is given the lining process with the polyurethane rubber material (or nitrile rubber material).

この実施例においては、２葉式ルーツロータ２６を採用しているが、本発明はこれに限定されることなく、３葉や４葉の多葉式ルーツロータを採用することも可能である。 In this embodiment, the two-leaf root rotor 26 is employed, but the present invention is not limited to this, and a three-leaf or four-leaf multi-leaf root rotor can also be employed.

図１に示すように、ルーツポンプ３の吸入管４５の吸入側には、気泡発生管４６を接続している。４７は気泡発生管４６の大径部４６ａに内蔵された気泡発生させるための衝突部材である。図４に示すように、衝突部材４７は、大径部４６ａの内底に載せられるリング４７ａから上方へ延びる４本の脚４７ｂの上端に円形板４７ｃを一体に設けた形態とされている。   As shown in FIG. 1, a bubble generating tube 46 is connected to the suction side of the suction tube 45 of the Roots pump 3. Reference numeral 47 denotes a collision member for generating bubbles built in the large diameter portion 46a of the bubble generating tube 46. As shown in FIG. 4, the collision member 47 is configured such that a circular plate 47c is integrally provided at the upper ends of four legs 47b extending upward from a ring 47a placed on the inner bottom of the large diameter portion 46a.

気泡発生管４６の入口側に接続した配管５０には、二酸化炭素ガスの導入口５１を設けている。５２は配管５０の本体５０ａから分岐された導入管５０ｂに取付けられた開閉弁である。   The pipe 50 connected to the inlet side of the bubble generating pipe 46 is provided with a carbon dioxide gas inlet 51. An on-off valve 52 is attached to the introduction pipe 50 b branched from the main body 50 a of the pipe 50.

以上により、ルーツポンプ３の運転により吸入管４５から水を吸い込むと共に二酸化炭素ガスの導入口５１からエジェクタ作用により取り込まれる二酸化炭素ガスが混合した水を衝突部材４７の円形板４７ｃに正面から衝突させることにより多量の気泡を発生させ、かつ、ルーツポンプ３による圧縮作用により気泡を微細化し、微細化された二酸化炭素ガスの気泡を含む水を排出管５５から河川等の水中に放出することにより、二酸化炭素ガスを水中に効率よく溶存させる本発明に係る二酸化炭素ガス回収装置Ｃが構成される。 As described above, water that is sucked from the suction pipe 45 by the operation of the roots pump 3 and mixed with carbon dioxide gas taken in by the ejector action from the carbon dioxide gas inlet 51 is caused to collide with the circular plate 47c of the collision member 47 from the front . By generating a large amount of bubbles, and by refining the bubbles by the compression action of the roots pump 3, the water containing the refined carbon dioxide gas bubbles is discharged from the discharge pipe 55 into water such as a river. the carbon dioxide gas recovery device C according to the present invention to dissolved efficiently carbon dioxide gas in the water is formed.

本発明に係る二酸化炭素ガス回収装置Ｃにおいては、排出管５５の出口側と吸入管４５の吸入側を所定容量のタンク（図示せず）に夫々接続し、そのタンク内の水をルーツポンプ３に循環供給するように構成することもできる。本発明装置を設置する場所の近くに河川や貯水池がない場合には、タンクを設置すれば所期の効果が得られる。   In the carbon dioxide gas recovery apparatus C according to the present invention, the outlet side of the discharge pipe 55 and the suction side of the suction pipe 45 are connected to a tank (not shown) having a predetermined capacity, respectively, and the water in the tank is supplied to the roots pump 3. It is also possible to configure so as to circulate the gas. If there is no river or reservoir near the place where the present apparatus is installed, the desired effect can be obtained by installing a tank.

（実験１及び実験２）
本発明に係る二酸化炭素ガス回収装置Ｃについて、図５に示す実験装置により当該装置から排出される二酸化炭素ガスの気泡を含む水をタンク内の水中へ放出させてタンク内における二酸化炭素ガス溶存量及び時間経過に伴う同ガス溶存量の変化を測定する実験を行なった。実験結果を図６のグラフに示す。
（実験条件）
２葉式ルーツポンプの口径：５０ｍｍ
回転速度：６５０ｒｐｍ
モータ出力：１．５Ｋｗ
吸込圧力：−２０ｋＰａ
吐出圧力：４０ｋＰａ
ポンプ吸込量：２００リットル／ｍｉｎ
実験１における二酸化炭素ガス濃度：３０％
（二酸化炭素ガスの量：１５リットル／ｍｉｎ、空気量：３５リットル／ｍｉｎ）
実験２における二酸化炭素ガス濃度：１００％
（二酸化炭素ガスの量：５リットル／ｍｉｎ、空気量：６リットル／ｍｉｎ）
タンクの容積：２．９ｍ３
水温：２５℃
（測定器）
二酸化炭素ガス溶存量測定器：株式会社東興化学研究所 Ｔｉ−９００４ (Experiment 1 and Experiment 2)
About the carbon dioxide gas recovery apparatus C according to the present invention , the amount of carbon dioxide gas dissolved in the tank is released by discharging water containing carbon dioxide gas bubbles discharged from the apparatus by the experimental apparatus shown in FIG. And the experiment which measured the change of the dissolved gas amount with the passage of time was conducted. The experimental results are shown in the graph of FIG.
(Experimental conditions)
Diameter of two-leaf root pump: 50mm
Rotational speed: 650rpm
Motor output: 1.5Kw
Suction pressure: -20kPa
Discharge pressure: 40kPa
Pump suction amount: 200 l / min
Carbon dioxide gas concentration in Experiment 1: 30%
(Amount of carbon dioxide gas: 15 liter / min, amount of air: 35 liter / min)
Carbon dioxide gas concentration in Experiment 2: 100%
(Amount of carbon dioxide gas: 5 liter / min, amount of air: 6 liter / min)
Tank volume: 2.9m 3
Water temperature: 25 ° C
(Measuring instrument)
Carbon dioxide gas dissolved amount measuring instrument: Toko Chemical Laboratory Ti-9004

実験１の結果、図６のグラフに示すように回収装置Ｃの運転時間が８０分経過した場合、二酸化炭素ガス溶存量、言い換えれば二酸化炭素濃度は約５７０（ｍｇ／リットル）となり、大量の二酸化炭素ガスが溶存することが確認された。また、二酸化炭素ガスの濃度は５日間経過後に約３８０（ｍｇ／リットル）となり、二酸化炭素ガスが水中に有効に溶存していることが確認された。   As a result of Experiment 1, as shown in the graph of FIG. 6, when the operation time of the recovery device C has passed 80 minutes, the dissolved amount of carbon dioxide gas, in other words, the carbon dioxide concentration is about 570 (mg / liter), and a large amount of carbon dioxide It was confirmed that carbon gas was dissolved. Moreover, the density | concentration of the carbon dioxide gas became about 380 (mg / liter) after five days progress, and it was confirmed that the carbon dioxide gas is dissolved in water effectively.

実験２については、前記ガスボンベを利用して１００％濃度の二酸化炭素ガスを水中へ９０分間放出し、ついで二酸化炭素ガスの供給を１２０分間停止し、毎分６リットルの空気を流入させることにより二酸化炭素ガス溶存量の変化を測定した。実験結果を図７のグラフに示す。   For Experiment 2, using the gas cylinder, 100% concentration carbon dioxide gas was released into water for 90 minutes, then the supply of carbon dioxide gas was stopped for 120 minutes, and 6 liters of air was allowed to flow in. Changes in the amount of carbon gas dissolved were measured. The experimental results are shown in the graph of FIG.

実験２の結果、二酸化炭素ガスの濃度は約２００分経過後に２００（ｍｇ／リットル）となり仮想飽和点に至った。   As a result of Experiment 2, the concentration of carbon dioxide gas became 200 (mg / liter) after about 200 minutes and reached the virtual saturation point.

（実験３）
容積１．０ｍ３のタンクに水を満たし、ポンプ吸込量：２００リットル／ｍｉｎでタンク内の水を循環させながら、２０℃の二酸化炭素ガスを２５リットル／ｍｉｎにて供給し、６０分間にわたるタンク内の二酸化炭素ガス溶存量の変化を測定した。 (Experiment 3)
Filled with water to a tank volume 1.0 m 3, the pump suction amount: while circulating the water in the tank at 200 l / min, a 20 ° C. carbon dioxide gas was supplied at 25 l / min, tank for 60 minutes The change of the dissolved amount of carbon dioxide gas was measured.

同様に、ポンプ吸込量：２００リットル／ｍｉｎでタンク内の水を循環させながら、ヒータによって加熱した約１００℃の二酸化炭素ガスを２５リットル／ｍｉｎにて供給し、６０分間にわたりタンク内の二酸化炭素ガス溶存量の変化を測定した。ついで、二酸化炭素ガスの供給を停止し、タンク内の二酸化炭素ガス溶存量の変化を７日間にわたって測定した。これらの実験結果を図８、図９のグラフに示す。   Similarly, while circulating water in the tank at a pump suction amount of 200 liters / min, about 100 ° C. carbon dioxide gas heated by a heater is supplied at 25 liters / min, and the carbon dioxide in the tanks for 60 minutes. The change in gas dissolved amount was measured. Subsequently, the supply of carbon dioxide gas was stopped, and the change in the dissolved amount of carbon dioxide gas in the tank was measured over 7 days. The results of these experiments are shown in the graphs of FIGS.

実験３の結果、２０℃の二酸化炭素ガスの濃度は、図８のグラフに示すように、６０分経過後に約１７５０（ｍｇ／リットル）となり、大量の二酸化炭素ガスが水中に溶存していることが確認された。そして、７日間経過後においても約１１００（ｍｇ／リットル）となり、二酸化炭素ガスが水中に有効に溶存していることが確認された。   As a result of Experiment 3, the concentration of carbon dioxide gas at 20 ° C. is about 1750 (mg / liter) after 60 minutes as shown in the graph of FIG. 8, and a large amount of carbon dioxide gas is dissolved in water. Was confirmed. And even after 7 days passed, it was about 1100 (mg / liter), and it was confirmed that carbon dioxide gas was effectively dissolved in water.

他方、１００℃の二酸化炭素ガスの濃度は、図９のグラフに示すように、６０分経過後に約２７００（ｍｇ／リットル）となり、大量の二酸化炭素ガスが水中に溶存していることが確認された。そして、７日間経過後においても約１９００（ｍｇ／リットル）となり、二酸化炭素ガスが水中に有効に溶存していることが確認された。   On the other hand, as shown in the graph of FIG. 9, the concentration of carbon dioxide gas at 100 ° C. is about 2700 (mg / liter) after 60 minutes, and it is confirmed that a large amount of carbon dioxide gas is dissolved in water. It was. And even after 7 days, it was about 1900 (mg / liter), and it was confirmed that carbon dioxide gas was dissolved effectively in water.

本発明に係る二酸化炭素ガス回収装置Ｃにおいて、導入管５０ｂから吸い込まれる二酸化炭素ガス量については、吸い込まれる水量に対して最大４０％の値である。 In the carbon dioxide gas recovery apparatus C according to the present invention , the amount of carbon dioxide gas sucked from the introduction pipe 50b is a maximum value of 40% with respect to the amount of water sucked.

Ｃ・・・本発明に係る二酸化炭素ガス回収装置
３・・・ルーツポンプ
４・・・ポンプケーシング
５・・・吸入口
６・・・吐出口
３８・・・駆動モータ
４５・・・吸入管
５１・・・二酸化炭素ガスの導入口
４６・・・気泡発生管
４６ａ・・・大径部
４７・・・衝突部材
４７ｃ・・・円形板
５５・・・排出管 C: Carbon dioxide gas recovery device 3 according to the present invention ... Roots pump 4 ... Pump casing 5 ... Suction port 6 ... Discharge port 38 ... Drive motor 45 ... Suction pipe 51 ... Carbon dioxide gas inlet
46 ... Bubble generating tube
46a ... large diameter portion 47 ... collision member
47c ... circular plate 55 ... discharge pipe

Claims (1)

化石燃料の燃焼時に発生する二酸化炭素ガスを回収する二酸化炭素ガス回収装置であって、
吸込口と吐出口を設けたポンプケーシング内に収められた一対のルーツロータを駆動モータにより回転自在に設けたルーツポンプと、その吸込口に接続される吸入管と、その吐出口に接続される排出管とを備え、その吸入管に連通する管路には二酸化炭素ガスの導入口と、吸い込んだ水と二酸化炭素ガスを内蔵された衝突部材に衝突させる気泡発生管とを設け、その衝突部材は、該気泡発生管の大径部の内底に載せられるリングから上方へ延びる脚の上端に円形板を一体に固定した形態とされ、
前記ルーツポンプの運転により前記吸入管から水を吸い込むと共に前記導入口から取り込まれる温室効果ガスとしての二酸化炭素ガスが混合した水を前記気泡発生管の衝突部材に衝突させることにより多量の気泡を発生させ、かつ、前記ルーツポンプによる圧縮作用によって気泡を微細化し、その微細化された二酸化炭素ガスの気泡を含む水を前記排出管から水中に放出することによって二酸化炭素ガスを水中に溶存させることを特徴とする二酸化炭素ガス回収装置。 A carbon dioxide gas recovery device that recovers carbon dioxide gas generated during combustion of fossil fuel,
A roots pump in which a pair of roots rotors housed in a pump casing provided with a suction port and a discharge port are rotatably provided by a drive motor, a suction pipe connected to the suction port, and a discharge connected to the discharge port A pipe that communicates with the suction pipe is provided with a carbon dioxide gas inlet, and a bubble generating pipe that collides the sucked water and the carbon dioxide gas into a collision member that is built in. The circular plate is integrally fixed to the upper end of the leg extending upward from the ring placed on the inner bottom of the large diameter portion of the bubble generating tube,
When the roots pump is operated, water is sucked from the suction pipe and a mixture of carbon dioxide gas as a greenhouse gas taken from the introduction port is caused to collide with a collision member of the bubble generation pipe to generate a large amount of bubbles. And by making the bubbles fine by the compression action of the Roots pump, and discharging the water containing the fined carbon dioxide gas bubbles from the discharge pipe into the water, the carbon dioxide gas is dissolved in the water. A carbon dioxide gas recovery device.
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