JP2007190529A - Acid gas absorber and air cleaner containing it - Google Patents
Acid gas absorber and air cleaner containing it Download PDFInfo
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Abstract
Description
本発明は、二酸化炭素などの酸性ガスによって汚染された空気から酸性ガスを除去する酸性ガス吸収体及び該吸収体を含む空気浄化装置に関する。 The present invention relates to an acidic gas absorber that removes acidic gas from air contaminated with acidic gas such as carbon dioxide, and an air purification device including the absorber.
最近、快適な生活環境を追求しつつ、冷暖房の省エネルギーを図るために、高気密化が進んでいる。このような中、本発明者らが検討したところ、高気密化された６畳間において、一晩、石油ストーブで暖房すると、長期安全限界の０．５％に近い０．４５％程度の二酸化炭素濃度に達することが観測され、新幹線の喫煙車両では０．３５％まで達する場合があり、東京の満員電車内では０．４４％まで達する場合があることが観測される等、居住空間における空気の汚染が懸念されている。かかる状況下で、例えば、室内の二酸化炭素濃度の基準である「０．１０％以下」の基準を確保にするために、高気密化された居住空間の空気浄化の必要性が叫ばれている。
既に、潜水艇、宇宙ステーションなどの密閉空間において汚染された空気から二酸化炭素を除去して密閉空間の空気を浄化する吸収体及び該吸収体を含む空気浄化装置として、弱塩基性陰イオン交換樹脂及び該樹脂の充填塔を含む空気浄化装置が知られている（特許文献１）。
Recently, in order to save energy for air conditioning while pursuing a comfortable living environment, airtightness has been increasing. Under these circumstances, the present inventors have examined that when heating with an oil stove overnight between 6 tatami mats that have been air-tightened, about 0.45% of dioxide dioxide, which is close to 0.5% of the long-term safety limit. It has been observed that the carbon concentration has been reached, and it can be as high as 0.35% in smoking vehicles on the Shinkansen, and as high as 0.44% in a crowded train in Tokyo. Contamination is a concern. Under such circumstances, for example, in order to ensure a standard of “0.10% or less”, which is a standard of indoor carbon dioxide concentration, the necessity of air purification in a highly airtight living space is screamed. .
A weakly basic anion exchange resin as an absorber that purifies the air in a sealed space by removing carbon dioxide from air already contaminated in a sealed space such as a submersible or space station, and an air purification device including the absorber And the air purification apparatus containing the packed tower of this resin is known (patent document 1).
しかしながら、本発明者らが検討したところ、弱塩基性陰イオン交換樹脂１Ｌあたりの二酸化炭素吸収量は約０．０１モルにとどまり、イオン交換樹脂容積あたりの二酸化炭素の吸着量が必ずしも十分ではなかった。
民間の住宅や交通機関等の居住空間においては、その利便性を維持するためには省スペースな空気浄化装置である必要があり、簡便に空気を浄化するためには、吸収体の交換が頻繁でないように長期間使用することができる空気浄化装置である必要がある。
本発明の目的は、省スペースでも多くの酸性ガスを除去することのできる酸性ガス吸収体及び該吸収体を含む空気浄化装置を提供することである。
However, when the present inventors examined, the carbon dioxide absorption amount per liter of weakly basic anion exchange resin is only about 0.01 mol, and the adsorption amount of carbon dioxide per ion exchange resin volume is not always sufficient. It was.
In residential spaces such as private houses and transportation facilities, it is necessary to use a space-saving air purification device in order to maintain its convenience, and in order to easily purify air, the absorber is frequently replaced. It is necessary to be an air purification device that can be used for a long time.
An object of the present invention is to provide an acidic gas absorber capable of removing a large amount of acidic gas even in a space-saving manner, and an air purification device including the absorber.
本発明は、強塩基性陰イオン交換樹脂に有機アミンが吸着されてなることを特徴とする酸性ガス吸収体、及び、該酸性ガス吸収体の充填塔と該充填塔に酸性ガス含有気体を供給し得る送風機器を含むことを特徴とする空気浄化装置である。 The present invention relates to an acidic gas absorber characterized in that an organic amine is adsorbed on a strongly basic anion exchange resin, and to supply an acidic gas-containing gas to the packed column of the acidic gas absorber and the packed column It is an air purification apparatus characterized by including the ventilation apparatus which can do.
本発明によれば、酸性ガス吸収体の容積あたりの酸性ガス吸収量が大きいことから、省スペースでも多くの酸性ガスを除去することのできる空気浄化装置を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, since the acidic gas absorption amount per volume of an acidic gas absorber is large, the air purification apparatus which can remove much acidic gas even in space saving can be provided.
以下、本発明について詳細に説明する。
本発明における酸性ガスとは、水に溶解すると酸性を呈するガスであり、具体的には、硫黄酸化物（ＳＯｘ）、窒素酸化物（ＮＯｘ）、二酸化炭素などが挙げられる。中でも、燃焼によって生じたり、人間などの動植物の呼気によって多く生じる二酸化炭素は、本発明の酸性ガス吸収体によって好適に除去することができる。
The present invention will be described in detail below.
The acidic gas in the present invention is a gas that exhibits acidity when dissolved in water, and specifically includes sulfur oxide (SOx), nitrogen oxide (NOx), carbon dioxide, and the like. Among them, carbon dioxide generated by combustion or a lot by exhalation of animals and plants such as humans can be suitably removed by the acidic gas absorber of the present invention.
本発明の酸性ガス吸収体は、強塩基性陰イオン交換樹脂に有機アミンが吸着されたものである。
本発明に用いられる強塩基性陰イオン交換樹脂は、４級アンモニウム基を交換基とする強塩基性陰イオン交換樹脂であり、強塩基性陰イオン交換樹脂を用いることにより、酸性ガスが希薄な気体であっても、省スペースで酸性ガスをほぼ完全に吸収し得るのである。
強塩基性陰イオン交換樹脂は、通常、ＯＨ型として用いる。
強塩基性陰イオン交換樹脂としては、例えば、デュオライトＡ１１３、Ａ１１３ＬＦ、Ａ１０９Ｄ、Ａ１１６、Ａ１１６ＬＦ、ＵＰ５０００、Ａ１６１ＴＲＳＯ４、Ａ１６２ＬＦなど（以上、ローム・アンド・ハース社登録商標、住化ケムテックス（株）から入手可能）、アンバーライトＩＲＡ４００、ＩＲＡ４１０、ＩＲＡ９００、ＩＲＡ９１０など（以上、ローム・アンド・ハース社登録商標）、ダイヤイオンＳＡ１０Ａ、ＳＡ２０Ａ、ＰＡ３１４、ＰＡ４１８など（以上、三菱化学社登録商標）、レバチットＭ５００、Ｍ６００、ＭＰ５００、ＭＰ６００など（以上、ランクセス社登録商標）、ダウエックスＡ、Ａ２、ＭＳＡ−１、ＭＳＡ−２など（以上、ダウケミカル社登録商標）などの市販品を用いればよい。
The acidic gas absorber of the present invention is obtained by adsorbing an organic amine on a strongly basic anion exchange resin.
The strongly basic anion exchange resin used in the present invention is a strongly basic anion exchange resin having a quaternary ammonium group as an exchange group. By using a strongly basic anion exchange resin, the acid gas is dilute. Even if it is a gas, it can absorb acid gas almost completely in a space-saving manner.
Strongly basic anion exchange resins are usually used as the OH type.
Examples of strongly basic anion exchange resins include Duolite A113, A113LF, A109D, A116, A116LF, UP5000, A161TRSO4, A162LF, and the like (from Rohm and Haas, registered trademark, Sumika Chemtex Co., Ltd.) Possible), Amberlite IRA400, IRA410, IRA900, IRA910, etc. (Registered Trademark, Rohm and Haas), Diaion SA10A, SA20A, PA314, PA418, etc. (Registered Trademark, Mitsubishi Chemical Corporation), Lebatit M500, M600 , MP500, MP600, etc. (above, LANXESS registered trademark), Dowex A, A2, MSA-1, MSA-2, etc. (above, Dow Chemical Company registered trademark) may be used.
本発明で用いられる有機アミンとしては、例えば、エチレンジアミン、ジエチレントリアミン、トリエチレンテトラミン、ポリイミンなどの（ポリ）アルキレン（ポリ）アミン、トリエチルアミン、ピリジンなどが挙げられ、臭いなどの観点から（ポリ）アルキレン（ポリ）アミンが好ましく、とりわけ、平均分子量が３００以下の（ポリ）アルキレン（ポリ）アミンが、吸着量の観点から好ましい。
有機アミンには、（ポリ）アルキレンポリアミンの粘度を調整するために、水を加えてもよい。有機アミンは、通常アルカリ性に調整され、塩を含有しないことが好ましい。
Examples of the organic amine used in the present invention include (poly) alkylene (poly) amines such as ethylenediamine, diethylenetriamine, triethylenetetramine, and polyimine, triethylamine, pyridine, and the like. From the viewpoint of odor, (poly) alkylene ( Poly) amine is preferable, and (poly) alkylene (poly) amine having an average molecular weight of 300 or less is particularly preferable from the viewpoint of the amount of adsorption.
Water may be added to the organic amine in order to adjust the viscosity of the (poly) alkylene polyamine. The organic amine is usually adjusted to be alkaline and preferably contains no salt.
酸性ガス吸収体の製造方法は、強塩基性陰イオン交換樹脂に有機アミンを吸着させればよく、具体的には、例えば、強塩基性陰イオン交換樹脂と有機アミンの液とを混合する方法、例えば、強塩基性陰イオン交換樹脂が充填された層に有機アミンの液を通液する方法などが挙げられる。
有機アミンの吸着量は、できるだけ吸着することが好ましい。強塩基性陰イオン交換樹脂が充填された層に有機アミンの液を通液する方法であれば、通常、通液前の有機アミン濃度と通液後の有機アミン濃度が変化しない程度まで吸着される。
酸性ガス吸収体の製造温度としては、強塩基性陰イオン交換樹脂の安定性から、通常、４０℃以下で実施され、好ましくは、０〜３０℃程度で実施される。
The method for producing an acidic gas absorber may be a method in which an organic amine is adsorbed on a strongly basic anion exchange resin. Specifically, for example, a method of mixing a strongly basic anion exchange resin and an organic amine solution. Examples thereof include a method of passing an organic amine solution through a layer filled with a strongly basic anion exchange resin.
It is preferable that the organic amine is adsorbed as much as possible. If the organic amine solution is passed through a layer filled with a strongly basic anion exchange resin, it is usually adsorbed to such an extent that the organic amine concentration before passing and the organic amine concentration after passing do not change. The
The production temperature of the acidic gas absorber is usually 40 ° C. or less, preferably about 0 to 30 ° C., because of the stability of the strongly basic anion exchange resin.
本発明の空気浄化装置は、前記酸性ガス吸収体が充填された充填塔と該充填塔に酸性ガス含有気体を供給し得る送風機器とを含む装置であり、本発明の除去方法は、例えば、該充填塔に該送風機器から酸性ガスを含む気体を供給する等によって、酸性ガスを含む気体を酸性ガス吸収体に接触させて酸性ガスを除去する方法である。
ここで、送風機器としては、例えば、ポンプ、コンプレッサー、ファン、ブロワーなどが挙げられる。
The air purification apparatus of the present invention is an apparatus including a packed tower filled with the acid gas absorber and a blower device capable of supplying an acid gas-containing gas to the packed tower, and the removal method of the present invention includes, for example, In this method, acid gas is removed by bringing gas containing acid gas into contact with the acid gas absorber by supplying gas containing acid gas from the blower to the packed tower.
Here, examples of the blower device include a pump, a compressor, a fan, and a blower.
さらに、本発明の実施の一形態である図１の空気浄化装置を用いて以下に説明する。
酸性ガス吸収体（１）は、底部に多孔板（１−３）を有する充填塔（１−１）に充填されている。
酸性ガスを含む気体（１−２及び破線の流れ）は、送風機器の１種であるポンプ（２）によって充填塔（１−１）の入口に供給される。
酸性ガスを含む気体は、酸性ガス吸収体の充填塔を通過する際に酸性ガス吸収体と接触する。酸性ガスは酸性ガス吸収体の有機アミンに吸収されると考えられる。
Furthermore, it demonstrates below using the air purification apparatus of FIG. 1 which is one Embodiment of this invention.
The acidic gas absorber (1) is packed in a packed tower (1-1) having a porous plate (1-3) at the bottom.
The gas (1-2 and the broken line flow) containing the acid gas is supplied to the inlet of the packed tower (1-1) by a pump (2) which is a kind of blower.
The gas containing the acid gas comes into contact with the acid gas absorber when passing through the packed column of the acid gas absorber. It is considered that the acid gas is absorbed by the organic amine of the acid gas absorber.
酸性ガスが低減した若しくはほとんど含まない、浄化された気体が充填塔出口（１−５）から排出される。気体出口（１−５）には、有機アミンの飛沫同伴を除去するためや、強塩基性陰イオン交換樹脂に含まれる４級アンモニウム基が分解して得られるトリメチルアミンなどの臭気物を除去するために、活性炭による吸着部、陽イオン交換樹脂による吸着部、吸収塔、全縮器、フィルターなどの脱臭部（１−４）が具備されていることが好ましい。中でも活性炭による吸着部、フィルターは設備が簡便であることが好ましい。図１では充填塔（１−１）と脱臭部（１−６）が離れて記載されているが、脱臭部は充填塔と直結されていてもよい。 Purified gas with reduced or almost no acid gas is discharged from the packed tower outlet (1-5). At the gas outlet (1-5), in order to remove entrainment of organic amines or to remove odorous substances such as trimethylamine obtained by decomposition of quaternary ammonium groups contained in the strongly basic anion exchange resin. It is preferable that a deodorizing part (1-4) such as an adsorbing part by activated carbon, an adsorbing part by cation exchange resin, an absorption tower, a total condenser, or a filter is provided. Among them, it is preferable that the adsorption part and filter using activated carbon have simple facilities. Although FIG. 1 shows the packed tower (1-1) and the deodorizing section (1-6) separated from each other, the deodorizing section may be directly connected to the packed tower.
酸性ガスを含む気体及び酸性ガス吸収体の接触は、イオン交換樹脂の安定性から、通常、４０℃以下で実施され、好ましくは、０〜３０℃程度で実施される。この温度を維持するために充填塔（１−１）には、断熱材、ジャケット、ヒーターなどの保温手段がさらに具備されていてもよい。
また、酸性ガスを含む気体は、図１のように、酸性ガス吸収体に対して、通常一方向から供給される。
充填塔（１−１）には、ＳＶ値（１時間あたり充填塔を通過した気体の体積／酸性ガス吸収体が占める体積）が１０Ｌ／（Ｌ・Ｈｒ）以上であれば、十分な酸性ガス吸着速度を確保しつつ、酸性ガスを該吸収体に吸収させることができる。また、２００００Ｌ／（Ｌ・Ｈｒ）以下であれば、酸性ガスを該吸収体に吸収させることができる傾向があることから好ましい。
The contact between the gas containing the acid gas and the acid gas absorber is usually carried out at 40 ° C. or less, preferably from about 0 to 30 ° C., from the stability of the ion exchange resin. In order to maintain this temperature, the packed tower (1-1) may further be provided with heat retaining means such as a heat insulating material, a jacket, and a heater.
Moreover, the gas containing acidic gas is normally supplied from one direction with respect to an acidic gas absorber like FIG.
If the SV value (volume of gas passed through the packed tower per hour / volume occupied by the acidic gas absorber) is 10 L / (L · Hr) or more, the packed tower (1-1) has sufficient acidic gas. The acid gas can be absorbed by the absorber while ensuring the adsorption rate. Moreover, if it is 20000L / (L * Hr) or less, since there exists a tendency which can absorb an acidic gas to this absorber, it is preferable.
酸性ガスを含む気体は、そのまま充填塔に供給して酸性ガス吸収体に接触させてもよいが、好ましくは、水と接触させたのち充填塔に供給して酸性ガス吸収体に接触させることが好ましい。水と予め接触させることにより、水を十分に含む気体として供給され、このことにより、酸性ガス吸収体の乾燥を緩和させ、該吸収体の減容が防止できる傾向があることから好ましい。
酸性ガスを含む気体と水との接触方法としては、図１の如く、水が充填された気泡塔３に酸性ガスを含む気体を供給する方法などが挙げられる。
The gas containing the acid gas may be supplied to the packed tower as it is to be brought into contact with the acidic gas absorber, but preferably, after contacting with water, the gas is supplied to the packed tower and brought into contact with the acidic gas absorber. preferable. By contacting with water in advance, it is supplied as a gas sufficiently containing water, and this is preferable because it tends to ease the drying of the acid gas absorber and prevent volume reduction of the absorber.
As a method for contacting a gas containing an acid gas with water, a method of supplying a gas containing an acid gas to the bubble column 3 filled with water as shown in FIG.
酸性ガス吸収体の酸性ガス吸収能が低下した場合、酸性ガス吸収体から有機アミンとともに酸性ガスを脱離させ、再び強塩基性陰イオン交換樹脂に有機アミンを吸着し、酸性ガス吸収体として使用することができる。この工程を再生工程と呼び、以下に再生工程について説明する。
酸性ガス吸収体の再生は、通常の強塩基性陰イオン交換樹脂の再生の如く、酸性ガス吸収体と塩基性水溶液とを接触させて該酸性ガス吸収体に含まれる酸性ガス及び有機アミンを塩基性水溶液に溶出させる方法である。
酸性ガス吸収体の再生に用いられる塩基性水溶液は、通常、苛性ソーダ、苛性カリウム等のアルカリ金属水酸化物水溶液である。該水溶液において、アルカリ金属水酸化物の濃度は、通常、２〜１０重量％程度である。
例えば、酸性ガスが二酸化炭素であれば、酸性ガス（二酸化炭素）は炭酸塩水溶液として酸性ガス吸収体から溶出され、酸性ガスが亜硫酸であれば、亜硫酸塩水溶液として溶出され、酸性ガスが亜硝酸であれば、亜硝酸塩として溶出される。
尚、酸性ガス吸収体の再生は高濃度の強塩基性水溶液が好適に用いられることから、空気浄化装置から充填塔を取り外して、専門業者によって再生することが推奨される。
得られた強塩基性水溶液に含まれる酸性ガスが二酸化炭素である場合、温室効果ガスである二酸化炭素を固定化するために、塩化カルシウムと混合して、炭酸カルシウム塩として固定化してもよい。
塩基性水溶液と接触した酸性ガス吸収体は、通常、水洗したのち有機アミンを吸着させて、再び、酸性ガスを吸着させる酸性ガス吸収体として、再度使用できる。
When the acid gas absorption capacity of the acid gas absorber decreases, the acid gas is desorbed from the acid gas absorber together with the organic amine, and the organic amine is adsorbed again on the strongly basic anion exchange resin and used as the acid gas absorber. can do. This process is called a regeneration process, and the regeneration process will be described below.
The regeneration of the acid gas absorber is carried out by bringing the acid gas absorber and the basic aqueous solution into contact with each other and bringing the acid gas and organic amine contained in the acid gas absorber into a base, as in the normal regeneration of a strongly basic anion exchange resin. This is a method of elution into an aqueous solution.
The basic aqueous solution used for regeneration of the acidic gas absorber is usually an aqueous alkali metal hydroxide solution such as caustic soda and caustic potassium. In the aqueous solution, the concentration of the alkali metal hydroxide is usually about 2 to 10% by weight.
For example, if the acidic gas is carbon dioxide, the acidic gas (carbon dioxide) is eluted from the acidic gas absorber as an aqueous carbonate solution, and if the acidic gas is sulfite, the acidic gas is eluted as an aqueous sulfite solution. If so, it is eluted as nitrite.
In addition, since the strong basic aqueous solution of high concentration is suitably used for the regeneration of the acid gas absorber, it is recommended to remove the packed tower from the air purifier and regenerate it by a specialist.
When the acidic gas contained in the obtained strongly basic aqueous solution is carbon dioxide, it may be mixed with calcium chloride and immobilized as a calcium carbonate salt in order to immobilize carbon dioxide, which is a greenhouse gas.
The acid gas absorber that has been in contact with the basic aqueous solution can be used again as an acid gas absorber that is usually washed with water, adsorbed with an organic amine, and adsorbed with an acid gas again.
さらに異なる再生工程として、酸性ガス吸収体から酸性ガスを速やかに放出させるために、酸性ガス吸収体に酸を接触させて、酸性ガスを気体として取り出す方法について説明する。
酸としては、塩酸、硫酸、リン酸、などの鉱酸が使用され、好ましくは酸性ガス吸収体１Ｌに対して酸を１モル以上の量、酸性ガス吸収体に接触させることが好ましい。
酸によって酸性ガスが除去された陰イオン交換樹脂を前記と同様に、アルカリ金属水酸化物水溶液で再生すると、再び、酸性ガスを吸着させることができる。
Further, as a different regeneration step, a method for taking out the acid gas as a gas by bringing the acid gas into contact with the acid gas absorber in order to quickly release the acid gas from the acid gas absorber will be described.
As the acid, a mineral acid such as hydrochloric acid, sulfuric acid, phosphoric acid or the like is used, and it is preferable to bring the acid into contact with the acidic gas absorber in an amount of 1 mol or more with respect to 1 L of the acidic gas absorber.
When the anion exchange resin from which the acid gas has been removed by the acid is regenerated with an aqueous alkali metal hydroxide solution, the acid gas can be adsorbed again.
次に、実施例等を挙げて本発明を更に詳細に説明するが、本発明はこれらの例により限定されるものではない。 EXAMPLES Next, although an Example etc. are given and this invention is demonstrated further in detail, this invention is not limited by these examples.
（実施例１）
＜酸性ガス吸収体の製造例１＞
ＯＨ型４級アンモニウム基の強塩基性陰イオン交換樹脂（デュオライト ＵＰ５０００
、ローム・アンド・ハース社（Ｒ＆Ｈ社）登録商標）１３０ｍｌが充填された充填塔（１、高さ５０ｃｍ、内径２．６ｃｍの塩ビ製塔、ニッコー社製）に２５重量％ジエチレントリアミン水溶液を２５℃程度の室温下でＳＶ（１時間あたり通過したアミン溶液の体積／樹脂が占める体積）＝１の流速で約２時間、下向きに流下し、酸性ガス吸収体を得た。
流下３０分後の溶出液のアミン濃度は２重量％であったが、１時間で２３．５重量％、１．５時間及び２時間で２５重量％であったことから、１．５時間で十分に有機アミンが吸着されたことがわかる。
Example 1
<Production Example 1 of Acid Gas Absorber>
OH type quaternary ammonium group strongly basic anion exchange resin (Duolite UP5000
Rohm and Haas (R & H) registered trademark) A packed tower (1, 50 cm in height and 2.6 cm in inner diameter made of PVC, manufactured by Nikko Corporation) filled with 130 ml of 25% by weight diethylenetriamine aqueous solution at 25 ° C. At about room temperature, SV (volume of amine solution passed per hour / volume occupied by the resin) was flowed downward at a flow rate of 1 for about 2 hours to obtain an acidic gas absorber.
The amine concentration in the eluate 30 minutes after flowing down was 2% by weight, but it was 23.5% by weight for 1 hour, 25% by weight for 1.5 hours, and 25% by weight for 2 hours. It can be seen that the organic amine was sufficiently adsorbed.
＜装置の調整＞
水が充填された気泡塔（３、加湿部、高さ５ｃｍ）と、前記酸性ガス吸収体が充填された充填塔（１）と気体出口（１−４）に活性炭脱臭装置（１−６、脱臭部）を図１の如く組み立てた。気体のラインは内径２ｍｍのチューブを用い、ポンプ（２、送風機器）は、エアーポンプニッソー社製α４０００を用いた。
<Adjustment of device>
A bubble column (3, humidification section, height 5 cm) filled with water, a packed column (1) filled with the acid gas absorber and a gas outlet (1-4) with an activated carbon deodorizer (1-6, The deodorizing part) was assembled as shown in FIG. The gas line used was a tube with an inner diameter of 2 mm, and the pump (2, blower) used was α4000 manufactured by Air Pump Nisso.
＜二酸化炭素の除去＞
ポンプ（２）を起動させて、室内の空気（二酸化炭素含有量３９０ｐｐｍ）をエアーポンプ（５）にて２０００ｍｌ／分（９２３Ｌ／（Ｌ・Ｈｒ））供給し、これを１６０時間継続した。この間、間欠的に気体出口（１−５）から排出される気体を採取してＪＩＳ Ｋ２３０１に準じて二酸化炭素の含有量を測定した。結果を表１に表す。
表１の結果に基づいて、通気時間と酸性ガス吸収体の出口二酸化炭素濃度との関係を図２に示した。
<Removal of carbon dioxide>
The pump (2) was started, and indoor air (carbon dioxide content: 390 ppm) was supplied by the air pump (5) at 2000 ml / min (923 L / (L · Hr)), and this was continued for 160 hours. During this time, the gas discharged intermittently from the gas outlet (1-5) was collected, and the carbon dioxide content was measured according to JIS K2301. The results are shown in Table 1.
Based on the results in Table 1, FIG. 2 shows the relationship between the ventilation time and the outlet carbon dioxide concentration of the acidic gas absorber.
ＳＰ−０１２：ポリエチレンイミン（日本触媒製、平均分子量１２００）
２５重量％水溶液
ＵＰ５０００：強塩基性イオン交換樹脂 デュオライト ＵＰ５０００（Ｒ＆Ｈ社）、
Ａ３６８Ｓ ：弱塩基性イオン交換樹脂 デュオライト Ａ３６８Ｓ（Ｒ＆Ｈ社）、
ＡＣ ：粒状活性炭 ＤＩＡＨＯＰＥ （三菱化学社）、
25% by weight aqueous solution UP5000: Strongly basic ion exchange resin Duolite UP5000 (R & H),
A368S: Weakly basic ion exchange resin Duolite A368S (R & H),
AC: granular activated carbon DIAHOPE (Mitsubishi Chemical Corporation),
（実施例２、比較例１〜３）
有機アミンを表１に記載のものを用いる以外は実施例１と同様に実施して、結果を表１及び図２にまとめた。図２より、酸性ガス吸収体単位体積あたりの二酸化炭素累積吸収量を計算し、結果を表２にまとめた。尚、比較例１は、有機アミンを吸着させていない場合の結果を示した。
(Example 2, Comparative Examples 1-3)
The organic amine was used in the same manner as in Example 1 except that the organic amine described in Table 1 was used, and the results are summarized in Table 1 and FIG. From FIG. 2, the carbon dioxide accumulated absorption amount per unit volume of the acid gas absorber was calculated, and the results are summarized in Table 2. In addition, the comparative example 1 showed the result when not adsorbing organic amine.
本発明の実施例によれば、気体出口からはほとんど臭気は生じず、φ２６ｍｍ×５０ｃｍＨの小さな充填塔で１００時間を越えても二酸化炭素の吸収が確認された。 According to the example of the present invention, almost no odor was generated from the gas outlet, and absorption of carbon dioxide was confirmed even after 100 hours in a small packed tower of φ26 mm × 50 cmH.
従来の装置であるイオン交換樹脂塔と本発明の装置である実施例１とは樹脂単位体積あたり２．６倍程度の酸性ガスを吸収することができる。このように、本発明の装置は省スペースでも多くの二酸化炭素を吸収できるという優れた効果を有することから、潜水艇、宇宙船、航空機、新幹線などの交通機関の居住空間；高気密性住宅などの居住空間、電子機器製造業などのクリーンルームや防塵室、病院や研究機関などの無菌室、放射線物質取扱室、宇宙ステーションなどの空間から酸性ガスを除去することが可能な空気浄化装置として用いることができる。また、発電所、工場等の煙突から排出される燃焼ガス等に含まれる酸性ガス（主に二酸化炭素）の除去装置として使用することができ、固定化の処理を施すことにより二酸化炭素を環境に放出することを抑制することができる。 The ion exchange resin tower which is a conventional apparatus and the embodiment 1 which is an apparatus of the present invention can absorb about 2.6 times the acidic gas per unit volume of the resin. As described above, since the apparatus of the present invention has an excellent effect of absorbing a large amount of carbon dioxide even in a space-saving manner, the living space for transportation such as submersibles, spacecrafts, airplanes, and bullet trains; highly airtight houses, etc. To be used as an air purification device that can remove acid gases from living spaces, electronic equipment manufacturing clean rooms and dust-proof rooms, hospitals and research institutions aseptic rooms, radioactive material handling rooms, space stations, etc. Can do. It can also be used as a removal device for acid gas (mainly carbon dioxide) contained in combustion gas discharged from chimneys of power plants, factories, etc. Release can be suppressed.
１ ：酸性ガス吸収体
１−１： 充填塔
１−２：（酸性ガスを含む気体の）気体入口
１−３：多孔板
１−４：活性炭脱臭装置、脱臭部
１−５：気体出口
２ ：酸性ガスを含む気体を供給するポンプ、送風機器
３ ：（水を含む）気泡塔、加湿部
DESCRIPTION OF SYMBOLS 1: Acid gas absorber 1-1: Packing tower 1-2: Gas inlet (of gas containing acid gas) 1-3: Perforated plate 1-4: Activated carbon deodorizing apparatus, deodorizing part 1-5: Gas outlet 2: Pump for supplying gas containing acid gas, blower equipment 3: Bubble tower (including water), humidifier
Claims (10)
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