JP3122244B2 - Polar gas separator - Google Patents
Polar gas separatorInfo
- Publication number
- JP3122244B2 JP3122244B2 JP04221197A JP22119792A JP3122244B2 JP 3122244 B2 JP3122244 B2 JP 3122244B2 JP 04221197 A JP04221197 A JP 04221197A JP 22119792 A JP22119792 A JP 22119792A JP 3122244 B2 JP3122244 B2 JP 3122244B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- polar gas
- polar
- absorbing liquid
- pressure
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は極性ガス分離装置に関
し、特に極性ガス含有ガスと極性ガス吸収液を疎水性多
孔質膜を介して気液接触させて極性ガス含有ガスより極
性ガスを分離する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polar gas separating apparatus, and more particularly to a method for separating a polar gas from a polar gas-containing gas by bringing the polar gas-containing gas and a polar gas absorbing solution into gas-liquid contact through a hydrophobic porous membrane. Related to the device.
【０００２】[0002]
【従来の技術】従来の極性ガス含有ガスと極性ガス吸収
液を疎水性多孔質膜を介して気液接触させて極性ガス含
有ガスより極性ガスを分離する装置の一態様を図５によ
って説明する。図５において、１は極性ガス含有ガス
（被処理ガス）入口、２は精製ガス出口、３は極性ガス
吸収液入口、４は極性ガス吸収液出口、５は疎水性多孔
質膜モジュール、６は極性ガス吸収液を示す。この従来
の装置は疎水性多孔質膜モジュール５の疎水性多孔質膜
内を極性ガス吸収液６が流れ、疎水性多孔質膜の外側を
極性ガス含有ガス１が流れ、疎水性多孔質膜を介した気
液接触により極性ガスが分離吸収されるようになってい
るものである。2. Description of the Related Art One embodiment of a conventional apparatus for separating a polar gas from a polar gas-containing gas by bringing a polar gas-containing gas and a polar gas-absorbing liquid into gas-liquid contact through a hydrophobic porous membrane will be described with reference to FIG. . In FIG. 5, 1 is a polar gas-containing gas (gas to be treated) inlet, 2 is a purified gas outlet, 3 is a polar gas absorbing liquid inlet, 4 is a polar gas absorbing liquid outlet, 5 is a hydrophobic porous membrane module, and 6 is 2 shows a polar gas absorbing liquid. In this conventional apparatus, the polar gas absorbing liquid 6 flows inside the hydrophobic porous membrane of the hydrophobic porous membrane module 5, and the polar gas-containing gas 1 flows outside the hydrophobic porous membrane. The polar gas is separated and absorbed by gas-liquid contact through the intermediary.
【０００３】[0003]
【発明が解決しようとする課題】ボイラの排ガスはボイ
ラ負荷や燃料・大気条件などにより、その圧力が変動す
るが、これは一般の装置より排出される極性ガス含有ガ
スにもあてはまる。一方、極性ガス吸収液は、これを流
動させるためにある圧力をもっている。したがって、疎
水性多孔質膜の内外にはある圧力差が生じることとな
る。The pressure of the boiler exhaust gas fluctuates depending on the boiler load, fuel and atmospheric conditions, and the like, but this also applies to polar gas-containing gas discharged from general equipment. On the other hand, the polar gas absorbing liquid has a certain pressure to make it flow. Therefore, a certain pressure difference occurs between the inside and outside of the hydrophobic porous membrane.
【０００４】ここで極性ガス吸収液の圧力が極性ガス含
有ガスの圧力より高い場合には、極性ガス吸収液が疎水
性多孔質膜の孔の中に押し出されやすくなり、膜の疎水
性が破壊され吸収性能の低下を招くこととなり、一方、
極性ガス吸収液の圧力が極性ガス含有ガスの圧力より低
い場合には、極性ガス含有ガスが疎水性多孔質膜の孔を
通り抜け、極性ガス吸収液中に極性ガス含有ガスが混入
し、吸収液中に気泡が発生し、吸収液の流路が狭くなっ
て流れ難くなったり、流路を完全にふさぎ流れなくなる
などの弊害が発生する。Here, when the pressure of the polar gas absorbing liquid is higher than the pressure of the polar gas-containing gas, the polar gas absorbing liquid is easily extruded into the pores of the hydrophobic porous membrane, and the hydrophobicity of the membrane is destroyed. And lead to a decrease in absorption performance.
When the pressure of the polar gas-absorbing liquid is lower than the pressure of the polar gas-containing gas, the polar gas-containing gas passes through the pores of the hydrophobic porous membrane, and the polar gas-containing gas is mixed into the polar gas-absorbing liquid. Bubbles are generated therein, and adverse effects such as narrowing of the flow path of the absorbing liquid, making it difficult to flow, and completely blocking the flow path and preventing the flow of the absorbing liquid occur.
【０００５】本発明は上記技術水準に鑑み、従来装置に
おいて発生する上記不具合を解消しうる極性ガス分離装
置を提供しようとするものである。The present invention has been made in view of the above-mentioned state of the art, and an object of the present invention is to provide a polar gas separating apparatus which can solve the above-mentioned problems occurring in the conventional apparatus.
【０００６】[0006]
【課題を解決するための手段】本発明は極性ガス含有ガ
スと極性ガス吸収液を疎水性多孔質膜を介して気液接触
させて極性ガス含有ガスより極性ガスを分離する装置に
おいて、極性ガス含有ガス側と極性ガス吸収液側の圧力
を均圧化するための均圧管を設けてなることを特徴とす
る極性ガス分離装置である。SUMMARY OF THE INVENTION The present invention relates to an apparatus for separating a polar gas from a polar gas-containing gas by bringing the polar gas-containing gas and a polar gas-absorbing liquid into gas-liquid contact through a hydrophobic porous membrane. A polar gas separation device comprising a pressure equalizing pipe for equalizing pressures on a content gas side and a polar gas absorbing liquid side.
【０００７】前記課題の解決のためには、極性ガス吸収
液と極性ガス含有ガスとを均圧化させる必要がある。そ
こで本発明は極性ガス含有ガス側と極性ガス吸収液側と
の間を均圧間で連結して両側の均圧化を図るようにした
ものである。In order to solve the above problems, it is necessary to equalize the pressure of the polar gas absorbing liquid and the polar gas-containing gas. Therefore, in the present invention, the polar gas-containing gas side and the polar gas absorbing liquid side are connected at equal pressures so as to equalize the pressure on both sides.
【０００８】[0008]
【作用】本発明により、ＣＯ2 ，ＳＯ2 ，Ｈ2 Ｓ，ＮＨ
3 などの極性ガスを含有するガスと極性ガス吸収液との
間の圧力差は僅少に保持されるため、多孔質膜の疎水性
が容易に保持され、本発明装置の性能を維持することが
可能となる。According to the present invention, CO 2 , SO 2 , H 2 S, NH
Since the pressure difference between the gas containing a polar gas such as 3 and the polar gas absorbing liquid is kept small, the hydrophobicity of the porous membrane is easily maintained, and the performance of the device of the present invention can be maintained. It becomes possible.
【０００９】本発明において使用される疎水性多孔質膜
の材質としては、ポリエチレン，ポリプロピレン，ポリ
テトラフルオロエチレンなどが使用され、該多孔質膜と
しては内径数百μ、肉厚数十μの中空糸形状のものが使
用され、これらの多孔質膜は数千〜数万本を円筒状など
の容器に充填した疎水性多孔質膜モジュールの状態で使
用される。As the material of the hydrophobic porous membrane used in the present invention, polyethylene, polypropylene, polytetrafluoroethylene, or the like is used. As the porous membrane, a hollow having an inner diameter of several hundred μ and a wall thickness of several tens μ is used. Thread-shaped porous membranes are used, and these porous membranes are used in the state of a hydrophobic porous membrane module in which thousands to tens of thousands of such porous membranes are filled in a container such as a cylinder.
【００１０】[0010]
（実施例１）本発明の一実施例を図１，図２によって説
明する。図１は該実施例装置の縦断側面図、図２は、図
１のＡ−Ａ矢視断面図を示し、図１，図２中、図５と同
一部分には同一符号を付してあるので説明は省略する。
なお、図１，図２中、７は極性ガス含有ガス側と極性ガ
ス吸収液側の圧力を均圧化するための均圧管、８は必要
に応じて設けられる吸収液出入口連絡管、９はＵ字管で
ある。(Embodiment 1) An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional side view of the apparatus of the embodiment, and FIG. 2 is a sectional view taken along the line AA in FIG. 1. In FIGS. 1 and 2, the same parts as those in FIG. Therefore, the description is omitted.
1 and 2, reference numeral 7 denotes a pressure equalizing pipe for equalizing the pressure between the polar gas-containing gas side and the polar gas absorbing liquid side, 8 denotes an absorbing liquid inlet / outlet connecting pipe provided as necessary, and 9 denotes It is a U-shaped tube.
【００１１】極性ガス含有ガス入口１から導入される被
処理ガスは疎水性多孔質膜モジュール５を通過する際に
極性ガス吸収液入口３から供給される極性ガス吸収液６
によって極性ガスが吸収され、精製ガス出口２より精製
ガスとなって取出される。この時、均圧管７を極性ガス
含有ガス入口側１と極性ガス吸収液入口側３との間に設
置し、極性ガス吸収液６を自然落下させることによりガ
ス側と吸収液側の差圧を僅少にすることが可能となる。The gas to be treated introduced from the polar gas containing gas inlet 1 passes through the hydrophobic porous membrane module 5 and the polar gas absorbing solution 6 supplied from the polar gas absorbing solution inlet 3
As a result, the polar gas is absorbed, and is taken out from the purified gas outlet 2 as purified gas. At this time, a pressure equalizing pipe 7 is installed between the polar gas-containing gas inlet side 1 and the polar gas absorbing liquid inlet side 3 and the polar gas absorbing liquid 6 is allowed to fall naturally to reduce the pressure difference between the gas side and the absorbing liquid side. It becomes possible to make it small.
【００１２】なお、この実施例装置においては、吸収液
出入口部連絡管８を設け、吸収液の入口側と、出口側の
均圧化を図り、吸収液が自然落下するようにすることが
好ましい。このようにすると、疎水性多孔質膜モジュー
ル５内を流れる吸収液の圧力は吸収液の静水圧による圧
力と流動による摩擦損失に基づく圧力との和になるが、
吸収液出入口間で一定となる。また、吸収液入口部の吸
収液のレベルは吸収液の供給量を調節することにより調
整することを原則とするが、余剰の吸収液を該吸収液出
入口部連絡管８を介してバイパスして吸収液レベルを調
整することも可能である。さらに、極性ガス吸収液出口
４にＵ字管９を設け、吸収液出口部の吸収液のレベルを
一定に保ち、ガスが吸収液出口４側へ通り抜けないよう
にするのも好ましい態様である。このＵ字管９の代わり
に弁などを用いてよいことも当然である。In the apparatus of this embodiment, it is preferable to provide a connecting pipe 8 for the inlet / outlet portion of the absorbing liquid so as to equalize the pressure on the inlet side and the outlet side of the absorbing liquid so that the absorbing liquid falls naturally. . In this case, the pressure of the absorbing liquid flowing in the hydrophobic porous membrane module 5 is the sum of the pressure due to the hydrostatic pressure of the absorbing liquid and the pressure based on the friction loss due to the flow.
It is constant between the inlet and outlet of the absorbing liquid. The level of the absorbing liquid at the inlet of the absorbing liquid is basically adjusted by adjusting the supply amount of the absorbing liquid. However, the surplus absorbing liquid is bypassed through the connecting pipe 8 for the absorbing liquid inlet / outlet. It is also possible to adjust the level of the absorbent. Further, it is also a preferable embodiment that a U-shaped tube 9 is provided at the polar gas absorbing liquid outlet 4 to keep the level of the absorbing liquid at the absorbing liquid outlet portion constant so that the gas does not pass through to the absorbing liquid outlet 4 side. It goes without saying that a valve or the like may be used instead of the U-shaped tube 9.
【００１３】（実施例２）本発明の他の実施例を図３，
図４によって説明する。図３は該実施例装置の縦断側面
図、図４は図３のＡ−Ａ矢印断面図を示し、図３，図４
中、図１，図２と同一部分には同一符号を付してあるの
で説明は省略する。Embodiment 2 Another embodiment of the present invention is shown in FIGS.
This will be described with reference to FIG. FIG. 3 is a longitudinal sectional side view of the apparatus of the embodiment, and FIG. 4 is a sectional view taken along the line AA of FIG.
The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.
【００１４】この実施例装置に前記実施例装置との異な
るところは極性ガス含有ガス側と極性ガス吸収液の入口
側及び出口側に夫々均圧管７が連結されている点であ
る。このように構成する場合には原則的には実施例１の
ような吸収液出入口連絡管８は設ける必要はない。しか
し、この実施例において、吸収液出入口連絡管８を設置
してあるのは、この途中に調節弁１０を設け、この開度
と吸収液供給量を調整することにより、疎水性多孔質膜
モジュール５の上部に貯まる吸収液の量を変化させるた
めである。この上部に貯まる吸収液の量を変えることに
よって吸収液の入口圧力（水頭圧）を変えることがで
き、これにより疎水性多孔質膜モジュール５内を流れる
吸収液の流速、すなわち流量を僅かであるが調整するこ
とができる効果が奏される。This embodiment differs from the above embodiment in that equalizing pipes 7 are connected to the polar gas-containing gas side and the inlet side and outlet side of the polar gas absorbing solution, respectively. In the case of such a configuration, it is not necessary in principle to provide the absorbing liquid inlet / outlet connecting pipe 8 as in the first embodiment. However, in this embodiment, the absorption liquid inlet / outlet communication pipe 8 is installed because the control valve 10 is provided in the middle of the connection pipe 8 and the opening degree and the supply amount of the absorption liquid are adjusted to thereby provide the hydrophobic porous membrane module. This is for changing the amount of the absorbing liquid stored in the upper part of No. 5. The inlet pressure (head pressure) of the absorbing solution can be changed by changing the amount of the absorbing solution stored in the upper portion, whereby the flow rate of the absorbing solution flowing in the hydrophobic porous membrane module 5, that is, the flow rate is small. Can be adjusted.
【００１５】[0015]
【発明の効果】本発明により、疎水性多孔質膜の疎水性
が保たれ、極性ガス吸収液の極性ガス含有ガス側への漏
出や、極性ガス含有ガスの極性ガス吸収液中への侵入を
防止することができるため、被処理ガスである極性ガス
含有ガスよりの極性ガスの分離を有効に行うことが可能
となる。According to the present invention, the hydrophobicity of the hydrophobic porous membrane is maintained, and the leakage of the polar gas absorbing liquid to the polar gas-containing gas side and the intrusion of the polar gas-containing gas into the polar gas absorbing liquid are prevented. Since it can be prevented, the polar gas can be effectively separated from the polar gas-containing gas to be processed.
【図１】本発明の極性ガス分離装置の一実施例の縦断側
面図FIG. 1 is a longitudinal side view of one embodiment of a polar gas separation device of the present invention.
【図２】図１のＡ−Ａ矢視断面図FIG. 2 is a sectional view taken along the line AA of FIG. 1;
【図３】本発明の極性ガス分離装置の他の実施例の縦断
側面図FIG. 3 is a longitudinal sectional side view of another embodiment of the polar gas separation device of the present invention.
【図４】図３のＡ−Ａ矢視断面図FIG. 4 is a sectional view taken along the line AA of FIG. 3;
【図５】従来の極性ガス分離装置の一態様の縦断側面図FIG. 5 is a longitudinal sectional side view of one embodiment of a conventional polar gas separation device.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松本 曠世 兵庫県高砂市荒井町新浜二丁目１番１号 三菱重工業株式会社高砂研究所内 (72)発明者 畑野 茂和 兵庫県高砂市荒井町新浜二丁目１番１号 三菱重工業株式会社高砂研究所内 (56)参考文献 特開 平４−171017（ＪＰ，Ａ) 特開 昭63−182020（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/14 B01D 53/22 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyo Matsumoto 2-1-1 Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. No. 1 Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (56) References JP-A-4-171017 (JP, A) JP-A-63-182020 (JP, A) (58) Fields investigated (Int. Cl. 7 , (DB name) B01D 53/14 B01D 53/22
Claims (1)
水性多孔質膜を介して気液接触させて極性ガス含有ガス
より極性ガスを分離する装置において、極性ガス含有ガ
ス側と極性ガス吸収液側の圧力を均圧化するための均圧
管を設けてなることを特徴とする極性ガス分離装置。An apparatus for separating a polar gas from a polar gas-containing gas by bringing the polar gas-containing gas and the polar gas-absorbing liquid into gas-liquid contact with each other through a hydrophobic porous membrane. A polar gas separation device comprising a pressure equalizing tube for equalizing the pressure on the liquid side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04221197A JP3122244B2 (en) | 1992-08-20 | 1992-08-20 | Polar gas separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04221197A JP3122244B2 (en) | 1992-08-20 | 1992-08-20 | Polar gas separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0663341A JPH0663341A (en) | 1994-03-08 |
| JP3122244B2 true JP3122244B2 (en) | 2001-01-09 |
Family
ID=16762995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04221197A Expired - Fee Related JP3122244B2 (en) | 1992-08-20 | 1992-08-20 | Polar gas separator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3122244B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6048383A (en) * | 1998-10-08 | 2000-04-11 | International Fuel Cells, L.L.C. | Mass transfer composite membrane for a fuel cell power plant |
| US8398743B2 (en) * | 2007-05-08 | 2013-03-19 | General Electric Company | Methods and systems for reducing carbon dioxide in combustion flue gases |
-
1992
- 1992-08-20 JP JP04221197A patent/JP3122244B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0663341A (en) | 1994-03-08 |
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