JPH0696092B2 - Method for adsorption and removal of dioxins - Google Patents
Method for adsorption and removal of dioxinsInfo
- Publication number
- JPH0696092B2 JPH0696092B2 JP4075805A JP7580592A JPH0696092B2 JP H0696092 B2 JPH0696092 B2 JP H0696092B2 JP 4075805 A JP4075805 A JP 4075805A JP 7580592 A JP7580592 A JP 7580592A JP H0696092 B2 JPH0696092 B2 JP H0696092B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- dioxins
- adsorbing
- gas
- removal
- 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
- Treating Waste Gases (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はダイオキシン類（有機塩
素化合物でポリ塩化ジベンゾダイオキシンの略）の吸着
除去方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adsorbing and removing dioxins (organic chlorine compounds, which is an abbreviation for polychlorinated dibenzodioxins).
【０００２】[0002]
【従来の技術】従来ダイオキシン類の吸着除去は、ダイ
オキシン類単味を活性炭や活性コ−クスで吸着して、排
ガスからダイオキシン類を除去し、その後吸着した活性
炭や活性コ−クスを燃焼して熱分解する方法である。即
ち、ダイオキシン類単味の取扱いであった。換言すれば
ダイオキシン類は他の成分と同時に処理しない方が除去
効率が高いものと考えられていた。従ってダイオキシン
類単味の処理方法のみが公知である。2. Description of the Related Art Conventionally, dioxins have been adsorbed and removed by adsorbing the dioxins alone with activated carbon or activated coke, removing the dioxins from the exhaust gas, and then burning the adsorbed activated carbon or activated coke. It is a method of thermal decomposition. That is, it was handling of dioxins alone. In other words, it was considered that dioxins had higher removal efficiency if they were not treated simultaneously with other components. Therefore, only the method for treating dioxins alone is known.
【０００３】そして排ガス中のダイオキシン類吸着・除
去の為の活性炭又は活性コ−クス法による装置に於い
て、ダイオキシン類の吸着・除去効率を高めるには装置
の容量を大きくしなければならず、これでは不経済であ
る。In an apparatus using activated carbon or an activated coke method for adsorbing / removing dioxins in exhaust gas, it is necessary to increase the capacity of the apparatus in order to enhance adsorption / removal efficiency of dioxins. This is uneconomical.
【０００４】[0004]
【発明が解決しようとする課題】本発明はダイオキシン
単味の処理という考えを打破し、他の成分即ちＳＯ2 ガ
スが存在する状態でダイオキシンをより高い除去効率で
吸着除去する方法を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention overcomes the idea of treating dioxin alone and provides a method for adsorbing and removing dioxin with higher removal efficiency in the presence of another component, SO 2 gas. With the goal.
【０００５】[0005]
【課題を解決するための手段】排ガス中のダイオキシン
類を吸着除去するための粒状活性炭移動層によるダイオ
キシン類吸着除去方法において、排ガス中にＳＯ2 が存
在する場合はダイオキシンと排ガス中のＳＯ2ガスを同
時に吸着処理するようにした。特に排ガス中にＳＯ2が
存在しない場合は、別にＳＯ2を注入してダイオキシン
とＳＯ2ガスを同時処理するようにした。又排ガス中に
少量のＳＯ2しか存在しない場合はさらにＳＯ2を注入し
て規定のＳＯ2濃度に制御してダイオキシンとＳＯ2ガス
を同時に処理するようにした。さらに、排ガス中にＳＯ
2 ガスを濃度５０〜１００ppm 以上添加するようにし
た。Means for Solving the Problems In a method for adsorbing and removing dioxins in exhaust gas by a moving bed of granular activated carbon for adsorbing and removing dioxins, when SO 2 is present in the exhaust gas, dioxins and SO 2 gas in the exhaust gas are used. Were simultaneously adsorbed. Especially if there is no SO 2 in the exhaust gas, and so as to simultaneously process the dioxins and SO 2 gas by injecting SO 2 separately. Also it was as if there is only a small amount of SO 2 in the exhaust gas and further controls the SO 2 concentration in the stipulated by injecting SO 2 processes the dioxins and SO 2 gas simultaneously. Furthermore, SO in the exhaust gas
Two gases were added at a concentration of 50 to 100 ppm or more.
【０００６】[0006]
【実施例】本発明者は図１の如く活性炭法によるダイオ
キシン吸着・除去装置の入口に濃度５０〜１００ppmの
ＳＯ2ガスを注入することによりダイオキシンの吸着・
除去効率が向上することを発見した。通常これら微量成
分は多成分であればあるほど除去効率が低下するとされ
ている。しかしながら上述の如く本発明者はダイオキシ
ン類にＳＯ2 をある濃度添加したところ、除去効率が一
段と向上した。ＳＯ2 がある濃度以下では除去効率に変
化は認められず効果がなかった。EXAMPLE The present inventor injects SO 2 gas having a concentration of 50 to 100 ppm into the inlet of a dioxin adsorption / removal apparatus by the activated carbon method as shown in FIG.
It was discovered that the removal efficiency was improved. Generally, it is said that the removal efficiency of these trace components decreases as the amount increases. However, as described above, when the present inventor added SO 2 to dioxin at a certain concentration, the removal efficiency was further improved. Below a certain concentration of SO 2 , no change was observed in the removal efficiency and no effect was obtained.
【０００７】そこで排ガス中のダイオキシン類を吸着除
去する際、排ガス中にＳＯ2 が存在する場合は図２のよ
うに脱離分解塔Ｂで分解されたＳＯ2 をダイオキシン吸
着除去装置Ａに戻し、このＳＯ2 とダイオキシンを同時
処理することにより除去効率を高めることができる。[0007] Therefore when adsorbing and removing dioxins in exhaust gas, if there is SO 2 in the exhaust gas returns to SO 2 decomposed with a leaving decomposing column B as shown in FIG. 2 dioxin adsorption and removal apparatus A, By simultaneously treating this SO 2 and dioxin, the removal efficiency can be increased.
【０００８】或いは排ガス中に少量しかＳＯ2が存在し
ない場合は規定の濃度になる迄ＳＯ2をさらに注入する
装置を備える必要がある。又排ガス中にＳＯ2が存在し
ない場合は、図３の如く別に設けたＳＯ2貯溜タンクＣ
からＳＯ2を注入すればダイオキシンの除去効率を高め
ることができる。Alternatively, when a small amount of SO 2 is present in the exhaust gas, it is necessary to provide a device for further injecting SO 2 to a specified concentration. If SO 2 does not exist in the exhaust gas, the SO 2 storage tank C provided separately as shown in FIG.
The injection efficiency of SO 2 can increase the efficiency of dioxin removal.
【０００９】以上説明したように排ガス中のダイオキシ
ン類の除去効率を高めるため、排ガス中にＳＯ2ガスを
混ぜ、ＳＯ2ガスと同時処理するようにしてダイオキシ
ンの吸着除去効率を向上させることが可能となったが、
これはＳＯ2 とダイオキシン類を吸着した活性炭を熱脱
離・分解する際、活性炭の細孔容積が増加し、ＳＯ2 吸
着分以上に活性炭の活性点が増加し、その結果ダイオキ
シンの除去効率が向上すると考えられる。As described above, in order to improve the removal efficiency of dioxins in the exhaust gas, it is possible to improve the adsorption removal efficiency of dioxins by mixing SO 2 gas into the exhaust gas and simultaneously treating with SO 2 gas. Became
This is because when thermal desorption / decomposition of activated carbon that adsorbs SO 2 and dioxins is performed, the pore volume of activated carbon increases and the active sites of activated carbon increase above the amount of SO 2 adsorbed. It is expected to improve.
【００１０】[0010]
【効果】排ガス中のダイオキシン類を吸着・除去する粒
状活性炭移動層によるダイオキシン類吸着・除去方法に
於いて、排ガス中にＳＯ2 が存在する場合は、ダイオキ
シンと排ガス中のＳＯ2 ガスを同時に吸着処理すること
により有害なダイオキシン類を効率的に吸着・除去でき
るようになった。[Effect] In the method for adsorbing / removing dioxins in exhaust gas by means of a granular activated carbon moving bed, if SO 2 is present in the exhaust gas, simultaneously adsorbs dioxins and SO 2 gas in the exhaust gas. By processing, it became possible to efficiently adsorb and remove harmful dioxins.
【００１１】このように従来の吸着の通念を打破し、排
ガス中に５０〜１００ppmのＳＯ2を混ぜ合せて共に効率
的に吸着除去することができ、適度にＳＯ2 が含まれて
いれば、ＳＯ2 の分離工程を省くことができ、工程的に
も、又経済的にも極めて有利となった。In this way, by breaking the conventional wisdom of adsorption, it is possible to efficiently adsorb and remove SO 2 by mixing 50 to 100 ppm of SO 2 in the exhaust gas, and if SO 2 is appropriately contained, The SO 2 separation step can be omitted, which is extremely advantageous in terms of process and economy.
【図１】本発明方法の原理図。FIG. 1 is a principle diagram of the method of the present invention.
【図２】排ガス中のＳＯ2 の少い場合のダイオキシン吸
着除去方法を実施する方法の概略図。FIG. 2 is a schematic diagram of a method for carrying out a dioxin adsorption / removal method when SO 2 in exhaust gas is low.
【図３】さらに、ＳＯ2 の少い場合のダイオキシン吸着
除去方法を実施する方法の概略図。FIG. 3 is a schematic view of a method for carrying out a dioxin adsorption / removal method in the case of low SO 2 .
Ａ ダイオキシン吸着除去装置 Ｂ 脱離分解塔 Ｃ ＳＯ2貯溜タンクA Dioxin adsorption / removal device B Desorption / decomposition tower C SO 2 storage tank
Claims (4)
るための粒状活性炭移動層によるダイオキシン類吸着除
去方法において、排ガス中にＳＯ2 が存在する場合はダ
イオキシン類と排ガス中のＳＯ2 ガスを同時に吸着処理
することを特徴とするダイオキシン類の吸着除去方法。1. A method for adsorbing and removing dioxins in exhaust gas using a moving bed of granular activated carbon for adsorbing and removing dioxins, wherein SO 2 gas in the exhaust gas is simultaneously adsorbed when SO 2 is present in the exhaust gas. A method for adsorbing and removing dioxins, which comprises treating.
にＳＯ2を排ガス中に注入してダイオキシンとＳＯ2 ガ
スを同時処理する請求項１のダイオキシン類の吸着除去
方法。2. The method for adsorbing and removing dioxins according to claim 1, wherein when SO 2 does not exist in the exhaust gas, SO 2 is separately injected into the exhaust gas to simultaneously treat dioxin and SO 2 gas.
場合はさらにＳＯ2を注入して規定のＳＯ2濃度に制御し
てダイオキシンとＳＯ2ガスを同時に処理することを特
徴とする請求項１のダイオキシン類の吸着除去方法。3. A process according to claim 1, characterized in that if there is only a small amount of SO 2 in the exhaust gas further by injecting SO 2 by controlling the SO 2 concentration in the stipulated processed simultaneously dioxins and SO 2 gas Method for adsorbing and removing dioxins from.
０ppm 以上添加することを特徴とする請求項１，請求項
２，請求項３のダイオキシン類の吸着除去方法。4. A concentration of SO 2 gas in the exhaust gas of 50 to 10
The method for adsorbing and removing dioxins according to claim 1, claim 2 or claim 3, characterized in that 0 ppm or more is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4075805A JPH0696092B2 (en) | 1992-02-28 | 1992-02-28 | Method for adsorption and removal of dioxins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4075805A JPH0696092B2 (en) | 1992-02-28 | 1992-02-28 | Method for adsorption and removal of dioxins |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00716298A Division JP3232336B2 (en) | 1998-01-19 | 1998-01-19 | Adsorption removal method of dioxins |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05237339A JPH05237339A (en) | 1993-09-17 |
| JPH0696092B2 true JPH0696092B2 (en) | 1994-11-30 |
Family
ID=13586783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4075805A Expired - Fee Related JPH0696092B2 (en) | 1992-02-28 | 1992-02-28 | Method for adsorption and removal of dioxins |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0696092B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000291922A (en) * | 1999-04-05 | 2000-10-20 | Nkk Corp | Method and apparatus for treating waste |
| JP2000291931A (en) * | 1999-04-05 | 2000-10-20 | Nkk Corp | Method and apparatus for treating waste |
-
1992
- 1992-02-28 JP JP4075805A patent/JPH0696092B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05237339A (en) | 1993-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |