JPH1057808A - Regenerating method for activated carbon - Google Patents
Regenerating method for activated carbonInfo
- Publication number
- JPH1057808A JPH1057808A JP8238490A JP23849096A JPH1057808A JP H1057808 A JPH1057808 A JP H1057808A JP 8238490 A JP8238490 A JP 8238490A JP 23849096 A JP23849096 A JP 23849096A JP H1057808 A JPH1057808 A JP H1057808A
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- alcohol
- adsorbed
- chlorinated hydrocarbon
- chlorinated hydrocarbons
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、活性炭の再生方法
に関し、さらに詳しくは塩素化炭化水素化合物が吸着し
た活性炭を再生する方法に関する。The present invention relates to a method for regenerating activated carbon, and more particularly, to a method for regenerating activated carbon having a chlorinated hydrocarbon compound adsorbed thereon.
【０００２】[0002]
【従来の技術】塩素化炭化水素化合物による地下水の汚
染が問題となっており、特にトリクロロエチレンおよび
テトラクロロエチレンなどは汚染物質として排水中の許
容濃度が定められている。このため、工場排水の処理工
程においてトリクロロエチレンおよびテトラクロロエチ
レンなどの塩素化炭化水素化合物を取り除くことが必要
である。一般的に、排水中の塩素化炭化水素化合物を取
り除く方法としては、直接空気を排水等へ吹き込むばっ
気式および活性炭による吸着式ならびにこれらを組み合
わせた方法などが知られている。これらの中で活性炭に
よる吸着式の方法においては、活性炭が飽和状態に近く
なるにつれて吸着能力が低下するため、活性炭が飽和状
態になる前に活性炭の交換または再生処理を行う必要が
あり、経費の関係から、交換するよりも適当な間隔で活
性炭を再生処理して繰り返し使用することが望ましい。
しかしながら、塩素化炭化水素化合物が吸着した活性炭
は、低温の条件では、吸着した塩素化炭化水素化合物を
脱離させることが困難なため、７００〜１０００℃の高
温状態で再生を行う必要があり、そのため活性炭の再生
には７００℃以上の耐熱性を有する設備が必要である。
従って、従来の方法は活性炭の再生に熱的コストおよび
設備費がかかるという欠点があり、さらに、塩素化炭化
水素化合物が吸着した活性炭を高温で再生させる際に、
塩化水素ガスなどの有害ガスが発生する恐れがあり、安
全性および装置の腐食の面で問題がある。2. Description of the Related Art Pollution of groundwater by chlorinated hydrocarbon compounds has become a problem. Particularly, trichlorethylene and tetrachloroethylene, etc., have an allowable concentration in wastewater as a pollutant. For this reason, it is necessary to remove chlorinated hydrocarbon compounds such as trichlorethylene and tetrachloroethylene in the process of treating industrial wastewater. In general, as a method for removing chlorinated hydrocarbon compounds in wastewater, there are known an aeration method in which air is directly blown into wastewater or the like, an adsorption method using activated carbon, and a method combining these methods. Among these, in the adsorption method using activated carbon, since the adsorption capacity decreases as the activated carbon approaches a saturated state, it is necessary to exchange or regenerate the activated carbon before the activated carbon is saturated, which is costly. For this reason, it is preferable that the activated carbon is regenerated at appropriate intervals and used repeatedly rather than exchanged.
However, the activated carbon to which the chlorinated hydrocarbon compound is adsorbed is required to be regenerated at a high temperature of 700 to 1000 ° C. because it is difficult to desorb the adsorbed chlorinated hydrocarbon compound at low temperature conditions. Therefore, equipment having heat resistance of 700 ° C. or more is required for regeneration of activated carbon.
Therefore, the conventional method has a drawback in that thermal and equipment costs are required for regeneration of the activated carbon, and further, when the activated carbon to which the chlorinated hydrocarbon compound is adsorbed is regenerated at a high temperature,
A harmful gas such as hydrogen chloride gas may be generated, which is problematic in terms of safety and equipment corrosion.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、塩素化炭化
水素化合物が吸着した活性炭の再生において、安価なコ
ストおよび簡易な設備で行うことができ、かつ有害な塩
化水素ガス等の発生の恐れがない方法を提供するもので
ある。SUMMARY OF THE INVENTION The present invention can regenerate activated carbon to which a chlorinated hydrocarbon compound has been adsorbed, which can be carried out at low cost and with simple equipment, and that harmful hydrogen chloride gas and the like may be generated. There is no way to provide.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、塩素化炭
化水素化合物が吸着した活性炭の再生方法について鋭意
検討した結果、活性炭に吸着した塩素化炭化水素化合物
をアルコールで抽出することにより活性炭が再生でき、
この方法によれば７００℃を越えるといった高温条件を
必要としないため、塩化水素ガス等の有害ガスが発生す
る恐れがなく、簡易な設備で活性炭の再生を行うことが
できることを見出し、本発明を完成するに至った。すな
わち、本発明は、塩素化炭化水素化合物が吸着した活性
炭を再生する方法において、活性炭に吸着した塩素化炭
化水素化合物をアルコールで抽出することにより、塩素
化炭化水素化合物を活性炭から脱離させることを特徴と
する活性炭の再生方法である。Means for Solving the Problems The present inventors have conducted intensive studies on a method for regenerating activated carbon having a chlorinated hydrocarbon compound adsorbed thereon. As a result, the chlorinated hydrocarbon compound adsorbed on the activated carbon was extracted with alcohol to obtain activated carbon. Can be played,
According to this method, since high temperature conditions such as exceeding 700 ° C. are not required, no harmful gas such as hydrogen chloride gas is generated, and it has been found that activated carbon can be regenerated with simple equipment, and the present invention has been achieved. It was completed. That is, the present invention provides a method for regenerating activated carbon having a chlorinated hydrocarbon compound adsorbed thereon, wherein the chlorinated hydrocarbon compound is desorbed from the activated carbon by extracting the chlorinated hydrocarbon compound adsorbed on the activated carbon with alcohol. A method for regenerating activated carbon, characterized in that:
【０００５】[0005]
【発明の実施の形態】本発明における活性炭としては、
ヤシ殻または石炭などを原料とする粒状活性炭ならびに
セルロースまたはアクリル樹脂などを原料とする繊維状
活性炭などが挙げられる。これらの中でも、塩素化炭化
水素化合物の吸着能力の面でヤシ殻を原料とする粒状活
性炭が好適である。また、吸着の対象となる塩素化炭化
水素化合物として揮発性あるいは不揮発性のいずれの化
合物にも適用でき、例えばトリクロロエチレン、テトラ
クロロエチレン、１，２−ジクロロエタン、１，１，
１，２−テトラクロロエタン、ペンタクロロエタン、ジ
クロロメタン、ｔｒａｎｓ−１，２−ジクロロエチレ
ン、ｃｉｓ−１，２−ジクロロエチレン、１，１−ジク
ロロエチレン、四塩化炭素、１，１，２−トリクロロエ
タン、１，３−ジクロロプロペンおよび１，１，１−ト
リクロロエタンなどが挙げられる。BEST MODE FOR CARRYING OUT THE INVENTION As activated carbon in the present invention,
Examples include granular activated carbon made from coconut shell or coal and fibrous activated carbon made from cellulose or acrylic resin. Among these, granular activated carbon made from coconut shell is preferred in terms of the adsorption capacity of chlorinated hydrocarbon compounds. Further, the present invention can be applied to any volatile or nonvolatile compound as a chlorinated hydrocarbon compound to be adsorbed. For example, trichloroethylene, tetrachloroethylene, 1,2-dichloroethane, 1,1,1
1,2-tetrachloroethane, pentachloroethane, dichloromethane, trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, 1,1-dichloroethylene, carbon tetrachloride, 1,1,2-trichloroethane, 1,3- Examples include dichloropropene and 1,1,1-trichloroethane.
【０００６】本発明における再生方法に用いる活性炭
は、前記塩素化炭化水素化合物が吸着したものであり、
その吸着方法としては、例えば、金属製の充填塔に活性
炭を充填した後、ポンプなどにより塩素化炭化水素化合
物を含む排水を前記充填塔に供給し、活性炭に排水を通
過させる方法などが挙げられる。前記吸着方法におい
て、排水中の塩素化炭化水素化合物の種類およびその濃
度ならびに目標とする吸着処理後の塩素化炭化水素化合
物の濃度（以下管理値という）により、吸着条件を適時
選択することができる。The activated carbon used in the regeneration method of the present invention is one in which the chlorinated hydrocarbon compound is adsorbed,
Examples of the adsorption method include, for example, a method in which after a metal-filled tower is filled with activated carbon, a wastewater containing a chlorinated hydrocarbon compound is supplied to the packed tower by a pump or the like, and the wastewater is passed through the activated carbon. . In the adsorption method, the adsorption conditions can be appropriately selected depending on the type and concentration of the chlorinated hydrocarbon compound in the wastewater and the target concentration of the chlorinated hydrocarbon compound after the adsorption treatment (hereinafter referred to as a control value). .
【０００７】本発明による活性炭の再生は、上記のごと
き活性炭による塩素化炭化水素化合物の吸着操作におい
て、活性炭を通過させた後の排水における塩素化炭化水
素化合物の濃度を分析し、この値が前記管理値を上回っ
たときに、排水の供給を停止して行うことが好ましい。
また、塩素化炭化水素化合物の濃度の上昇に応じて、早
めに活性炭の再生処理を行うことが、吸着操作の効率の
面から好適である。In the regeneration of activated carbon according to the present invention, the concentration of the chlorinated hydrocarbon compound in the wastewater after passing through the activated carbon is analyzed in the operation of adsorbing the chlorinated hydrocarbon compound by the activated carbon as described above. When the value exceeds the control value, it is preferable to stop the supply of the drainage water.
Further, it is preferable from the viewpoint of the efficiency of the adsorption operation that the activated carbon be regenerated as soon as the concentration of the chlorinated hydrocarbon compound increases.
【０００８】本発明の活性炭の再生方法で使用されるア
ルコールとしては、メチルアルコール、エチルアルコー
ル、ｎ−プロピルアルコールおよびイソプロピルアルコ
ールなどが挙げられ、これらの中でも経済性および取扱
いの容易さの面からメチルアルコールが特に好ましい。The alcohol used in the method for regenerating activated carbon of the present invention includes methyl alcohol, ethyl alcohol, n-propyl alcohol and isopropyl alcohol. Among them, methyl alcohol is preferred from the viewpoints of economy and ease of handling. Alcohols are particularly preferred.
【０００９】活性炭に吸着した塩素化炭化水素化合物を
アルコールで抽出させる方法は特に限定されないが、例
えば、先の吸着工程で使用した活性炭を充填塔から取り
出すことなく、充填塔に充填したままの状態で、ポンプ
などによりアルコールを充填塔に供給することで、活性
炭に吸着した塩素化炭化水素化合物を抽出する方法など
が挙げられる。アルコールによる塩素化炭化水素化合物
の抽出条件は特に限定されないが、抽出能力の面から１
０〜５０℃の温度範囲であることが好ましい。活性炭に
対するアルコールの供給量は、特に限定されないが、１
時間当たり、活性炭１ｇに対するアルコールの供給量が
５ｍｌ以上であることが好適である。The method of extracting the chlorinated hydrocarbon compound adsorbed on the activated carbon with alcohol is not particularly limited. For example, the activated carbon used in the previous adsorption step is not taken out of the packed column, but is still packed in the packed column. Then, a method of extracting a chlorinated hydrocarbon compound adsorbed on activated carbon by supplying alcohol to a packed column by a pump or the like can be mentioned. The conditions for extracting the chlorinated hydrocarbon compound with the alcohol are not particularly limited.
The temperature is preferably in the range of 0 to 50 ° C. The amount of alcohol supplied to the activated carbon is not particularly limited.
It is preferable that the supply amount of alcohol per 1 g of activated carbon per hour is 5 ml or more.
【００１０】前記アルコールによる抽出により、吸着し
ていた塩素化炭化水素化合物が脱離した活性炭は、必要
に応じて水洗および乾燥などを行うことにより、繰り返
し塩素化炭化水素化合物の吸着に使用することができ
る。The activated carbon from which the adsorbed chlorinated hydrocarbon compound has been desorbed by the extraction with the alcohol may be repeatedly used for adsorption of the chlorinated hydrocarbon compound by washing with water and drying if necessary. Can be.
【００１１】一方、抽出に使用したアルコールには、活
性炭に吸着していた塩素化炭化水素化合物が混合する
が、抽出能力が低下しない限りは、特に分離などの処理
を必要とせずに、そのまま繰り返し前記活性炭の再生に
使用することができる。ただし、繰り返し使用するにつ
れて抽出能力が低下するため、蒸留などの分離手段を用
いてアルコールを精製することが必要となる。On the other hand, the chlorinated hydrocarbon compound adsorbed on the activated carbon is mixed with the alcohol used for the extraction, and as long as the extraction ability is not reduced, no particular treatment such as separation is required, and the alcohol is repeatedly used as it is. It can be used for regeneration of the activated carbon. However, since the extraction ability is reduced with repeated use, it is necessary to purify the alcohol using a separation means such as distillation.
【００１２】本発明における活性炭の再生方法は、活性
炭に吸着した塩素化炭化水素化合物とアルコールの相溶
性が良いことおよび活性炭の細孔深くまでアルコールが
浸透する性質を利用するものであって、これらの性質に
よりアルコールが塩素化炭化水素化合物と入れ代わるこ
とで、塩素化炭化水素化合物が活性炭から脱離するので
ある。The method for regenerating activated carbon in the present invention utilizes the good compatibility between a chlorinated hydrocarbon compound adsorbed on activated carbon and alcohol and the property of activated carbon to penetrate deep into the pores of activated carbon. When the alcohol replaces the chlorinated hydrocarbon compound due to the nature of the above, the chlorinated hydrocarbon compound is eliminated from the activated carbon.
【００１３】[0013]
【実施例】以下実施例により本発明をさらに詳しく説明
する。 実施例 （１）テトラクロロエチレンの吸着 内径２０ｍｍで長さ１００ｍｍのステンレス製の充填塔
に、粒状活性炭〔二村化学工業（株）製：商品名太閤Ｃ
Ｗ−１３０Ｂ〕を２０ｍｌ（重量としては９ｇ）充填
し、テトラクロロエチレン濃度８ｐｐｍの排水を、２０
０ｍｌ／Ｈｒ（充填した活性炭に対しＳＶ＝１０Ｈ
ｒ-1）の流量で前記充填塔に供給した。５０時間ごとに
出口よりサンプリングを行い、ＪＩＳ−Ｋ０１２５「用
水・排水中の低分子量ハロゲン化炭化水素試験方法」に
準じて、排水中のテトラクロロエチレンの濃度を測定し
た。その結果を下記表１に示した。３００時間経過後、
充填塔出口の排水中のテトラクロロエチレン濃度が上昇
したので、充填塔への排水の供給を停止した。 （２）活性炭の再生 次いで、メチルアルコールを上記活性炭が充填されてい
る充填塔へ２００ｍｌ／Ｈｒの流量で２時間供給し、活
性炭の再生を行った。メチルアルコール供給停止後、窒
素ガスを１００ｍｌ／Ｈｒで３０分間供給した後、蒸留
水を１００ｍｌ／Ｈｒで３０分間供給し、活性炭の水洗
浄を行った。The present invention will be described in more detail with reference to the following examples. Example (1) Adsorption of tetrachloroethylene A granular activated carbon [manufactured by Nimura Chemical Industry Co., Ltd., trade name: Taiko C] was placed in a stainless steel packed tower having an inner diameter of 20 mm and a length of 100 mm.
W-130B] was filled with 20 ml (9 g in weight), and wastewater having a tetrachloroethylene concentration of 8 ppm
0 ml / Hr (SV = 10H for filled activated carbon)
r -1 ) was supplied to the packed column. Sampling was performed every 50 hours from the outlet, and the concentration of tetrachloroethylene in the wastewater was measured in accordance with JIS-K0125 “Test method for low molecular weight halogenated hydrocarbons in water and wastewater”. The results are shown in Table 1 below. After 300 hours,
Since the concentration of tetrachlorethylene in the wastewater at the outlet of the packed tower increased, the supply of the wastewater to the packed tower was stopped. (2) Regeneration of activated carbon Next, methyl alcohol was supplied to the packed tower filled with the activated carbon at a flow rate of 200 ml / Hr for 2 hours to regenerate the activated carbon. After the supply of methyl alcohol was stopped, nitrogen gas was supplied at 100 ml / Hr for 30 minutes, and then distilled water was supplied at 100 ml / Hr for 30 minutes to wash the activated carbon with water.
【００１４】（３）再生した活性炭を用いたテトラクロ
ロエチレンの吸着および活性炭の再生 上記の操作で再生を行った活性炭を用いて、前記（１）
と同様な条件で排水中のテトラクロロエチレンの吸着を
行い、（１）と同様に充填塔出口の排水中のテトラクロ
ロエチレン濃度を測定した。その結果を表１に示す。さ
らに、充填塔出口の排水中のテトラクロロエチレン濃度
の上昇に併せて、（２）と同様に活性炭の再生を行っ
た。以上の吸着および再生を５回繰り返し、５回目の再
生を行った活性炭の吸着試験の結果を表１に示す。(3) Adsorption of tetrachloroethylene using regenerated activated carbon and regeneration of activated carbon Using the activated carbon regenerated by the above operation,
The tetrachloroethylene in the wastewater was adsorbed under the same conditions as in (1), and the concentration of tetrachloroethylene in the wastewater at the outlet of the packed tower was measured in the same manner as in (1). Table 1 shows the results. Further, the activated carbon was regenerated in the same manner as in (2) in accordance with the increase in the concentration of tetrachloroethylene in the wastewater at the outlet of the packed tower. The above adsorption and regeneration were repeated five times, and the results of the adsorption test of the activated carbon subjected to the fifth regeneration are shown in Table 1.
【００１５】[0015]
【表１】 ＮＤ：検出限界（0.005 ppm ）以下[Table 1] ND: below detection limit (0.005 ppm)
【００１６】[0016]
【発明の効果】本発明の活性炭の再生方法によれば、簡
易な設備で効率よく、かつ有害な塩化水素ガス等が発生
する恐れがなく、塩素化炭化水素化合物が吸着した活性
炭の再生を行うことができる。According to the method for regenerating activated carbon of the present invention, the activated carbon to which chlorinated hydrocarbon compounds are adsorbed is efficiently regenerated with simple equipment and without the risk of generating harmful hydrogen chloride gas. be able to.
Claims (2)
再生する方法において、活性炭に吸着した塩素化炭化水
素化合物をアルコールで抽出することにより、塩素化炭
化水素化合物を活性炭から脱離させることを特徴とする
活性炭の再生方法。1. A method for regenerating activated carbon having a chlorinated hydrocarbon compound adsorbed thereon, wherein the chlorinated hydrocarbon compound is desorbed from the activated carbon by extracting the chlorinated hydrocarbon compound adsorbed on the activated carbon with an alcohol. Characteristic activated carbon regeneration method.
項１記載の活性炭の再生方法。2. The method for regenerating activated carbon according to claim 1, wherein the alcohol is methyl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8238490A JPH1057808A (en) | 1996-08-21 | 1996-08-21 | Regenerating method for activated carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8238490A JPH1057808A (en) | 1996-08-21 | 1996-08-21 | Regenerating method for activated carbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1057808A true JPH1057808A (en) | 1998-03-03 |
Family
ID=17031028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8238490A Pending JPH1057808A (en) | 1996-08-21 | 1996-08-21 | Regenerating method for activated carbon |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1057808A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004043278A (en) * | 2002-05-14 | 2004-02-12 | Morikawa Co Ltd | Activated carbon excellent in capability for adsorbing/desorbing halogenated organic compound, its production method, and apparatus and method for adsorbing/desorbing halogenated organic compound |
| JP2020040060A (en) * | 2018-07-23 | 2020-03-19 | ケミカル アンド メタル テクノロジーズ リミテッド ライアビリティ カンパニーＣｈｅｍｉｃａｌ Ａｎｄ Ｍｅｔａｌ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｌｌｃ | Emission control system capable of cleaning/reproducing carbon-based adsorbent and use method thereof |
| US11534734B2 (en) | 2014-07-25 | 2022-12-27 | Chemical and Metal Technologies LLC | CZTS sorbent |
-
1996
- 1996-08-21 JP JP8238490A patent/JPH1057808A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004043278A (en) * | 2002-05-14 | 2004-02-12 | Morikawa Co Ltd | Activated carbon excellent in capability for adsorbing/desorbing halogenated organic compound, its production method, and apparatus and method for adsorbing/desorbing halogenated organic compound |
| US11534734B2 (en) | 2014-07-25 | 2022-12-27 | Chemical and Metal Technologies LLC | CZTS sorbent |
| JP2020040060A (en) * | 2018-07-23 | 2020-03-19 | ケミカル アンド メタル テクノロジーズ リミテッド ライアビリティ カンパニーＣｈｅｍｉｃａｌ Ａｎｄ Ｍｅｔａｌ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｌｌｃ | Emission control system capable of cleaning/reproducing carbon-based adsorbent and use method thereof |
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