JP3232336B2 - Adsorption removal method of dioxins - Google Patents
Adsorption removal method of dioxinsInfo
- Publication number
- JP3232336B2 JP3232336B2 JP00716298A JP716298A JP3232336B2 JP 3232336 B2 JP3232336 B2 JP 3232336B2 JP 00716298 A JP00716298 A JP 00716298A JP 716298 A JP716298 A JP 716298A JP 3232336 B2 JP3232336 B2 JP 3232336B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- dioxin
- dioxins
- exhaust gas
- activated carbon
- 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, abbreviation for polychlorinated dibenzodioxin).
【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 are adsorbed and removed by simply adsorbing dioxins with activated carbon or activated coke, removing dioxins from exhaust gas, and then burning the adsorbed activated carbon or activated coke. It is a method of thermal decomposition. That is, the handling of dioxins was simple. In other words, it has been considered that the removal efficiency is higher when dioxins are not treated simultaneously with other components. Therefore, only a dioxin-only treatment method 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。[0003] In an apparatus using activated carbon or activated coke for the adsorption and removal of dioxins in exhaust gas, the capacity of the apparatus must be increased in order to increase the efficiency of adsorption and removal 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。SUMMARY OF THE INVENTION The present invention breaks down the idea of treating dioxin only and provides a method for adsorbing and removing dioxin with higher removal efficiency in the presence of other components, that is, SO 2 gas. With the goal.
【０００５】[0005]
【課題を解決するための手段】本発明に係るダイオキシ
ン類の吸着除去方法は、排ガス中のダイオキシン類を除
去するために、ダイオキシンとＳＯ2ガスを同時に活性
炭に吸着する粒状活性炭移動層を備えたダイオキシン吸
着除去装置によるダイオキシン類の吸着除去方法であっ
て、排ガス中にＳＯ2ガスが初めから存在する場合は、
ダイオキシンとＳＯ2ガスを吸着した前記活性炭からダ
イオキシンとＳＯ2ガスを脱離・分解処理する脱離分解
塔で分解されたＳＯ2ガスを、前記脱離分解塔に配管さ
れた排ガスラインを経由して前記ダイオキシン吸着除去
装置に戻し、ＳＯ2ガスとダイオキシンとを同時に処理
することを特徴とする。また、排ガス中のダイオキシン
類を除去するために、ダイオキシンとＳＯ2ガスを同時
に活性炭に吸着する粒状活性炭移動層を備えたダイオキ
シン吸着除去装置によるダイオキシン類の吸着除去方法
であって、排ガス中に少量のＳＯ2ガスしか存在しない
場合又は排ガス中にＳＯ2ガスが存在しない場合は、Ｓ
Ｏ2貯溜タンクからＳＯ2ガスを排ガス中に注入して規定
のＳＯ2濃度に制御すると共に、ダイオキシンとＳＯ2ガ
スを吸着した前記活性炭からダイオキシンとＳＯ2ガス
を脱離・分解処理する脱離分解塔で分解されたＳＯ2ガ
スを、前記脱離分解塔に配管された排ガスラインを経由
して前記ダイオキシン吸着除去装置に戻し、ＳＯ2ガス
とダイオキシンとを同時に処理することを特徴とする。A method for adsorbing and removing dioxins according to the present invention comprises a granular activated carbon moving bed for simultaneously adsorbing dioxin and SO 2 gas to activated carbon in order to remove dioxins in exhaust gas. A dioxin adsorption and removal method using a dioxin adsorption and removal device, wherein SO 2 gas is present in the exhaust gas from the beginning,
Dioxin and SO 2 gas SO 2 gas was decomposed with a leaving decomposing column for desorption and decomposition process dioxins and SO 2 gas from the activated carbon has adsorbed, via the exhaust gas line which is plumbed to the elimination decomposing column the return to the dioxin adsorption and removal apparatus, characterized by simultaneously processing the SO 2 gas and dioxins Te. Further, in order to remove dioxins in exhaust gas, a method of adsorbing and removing dioxins by a dioxin adsorption and removal apparatus having a granular activated carbon moving bed that simultaneously adsorbs dioxin and SO 2 gas to activated carbon, wherein a small amount of If SO 2 gas is not present if only the SO 2 gas is not present or in the exhaust gas, S
The O 2 SO 2 gas from the storage tank to control the SO 2 concentration in the stipulated injected into the exhaust gas, dioxins and SO 2 gas desorption desorbing-decomposing dioxins and SO 2 gas from the activated carbon with adsorbed The SO 2 gas decomposed in the decomposition tower is returned to the dioxin adsorption / removal device via an exhaust gas line piped to the desorption decomposition tower, and the SO 2 gas and dioxin are simultaneously treated.
【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が５０〜１００pp
m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。通常これら排ガ
ス中の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
は排ガス中のダイオキシン類にＳＯ2 をある濃度添加し
たところ、ダイオキシンの除去効率が一段と向上するこ
とを発見した。そして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。このように除去
効率が一段と向上する濃度を以下ＳＯ2 の規定の濃度と
呼称するものとする。因みに本発明においてはこのよう
な規定の濃度のＳＯ2 添加が重要であるが、実験に供与
された活性炭移動層に於ては、排ガス中に濃度が５０〜
１００ppm のＳＯ2 ガスを注入すると、ダイオキシンの
除去効率が一段と向上することを確認した。DETAILED DESCRIPTION OF THE INVENTION As shown in FIG.
It has been discovered that the injection of m 2 SO 2 gas improves the efficiency of dioxin adsorption and removal. It is generally said that the more the trace components in the exhaust gas, the more the removal efficiency is reduced. However, as described above, the present inventors have found that when SO 2 is added to dioxins in exhaust gas at a certain concentration, the dioxin removal efficiency is further improved. When the concentration of SO 2 was lower than a certain concentration, no change was observed in the removal efficiency, and there was no effect. The concentration at which the removal efficiency is further improved is hereinafter referred to as a specified concentration of SO 2 . Incidentally While SO 2 is added at a concentration of such provision is important in the present invention, Te is at the activated carbon transfer layer which is provided to the experiment, 50 to a concentration in the exhaust gas
It was confirmed that when 100 ppm SO 2 gas was injected, the dioxin removal efficiency was further improved.
【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 が初めから存在する場合は
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, the SO 2 case decomposed with a leaving decomposing column B as shown in Figure 2 SO 2 is present from the beginning dioxin adsorption and removal apparatus A in the exhaust gas By removing the SO 2 and dioxin simultaneously, removal efficiency can be increased.
【０００８】或いは排ガス中に少量しかＳＯ2 が存在し
ない場合は上にのべた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ＳＯ
2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 only a small amount of SO 2 is present in the exhaust gas, it is necessary to provide a device for injecting SO 2 further until the concentration reaches the above-specified concentration. SO in exhaust gas
When 2 does not exist, dioxin removal efficiency can be increased by injecting SO 2 from a separately provided SO 2 storage tank C as shown in FIG.
【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
積極的に混ぜ、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 increase the efficiency of removing dioxins in exhaust gas, SO 2 gas is positively mixed in the exhaust gas and is simultaneously treated with SO 2 gas to improve the efficiency of adsorption and removal of dioxin. However, when thermal desorption and decomposition of activated carbon adsorbing SO 2 and dioxins, the pore volume of activated carbon increases,
It is considered that the active sites of activated carbon increase more than the amount of SO 2 adsorbed, and as a result, the dioxin removal efficiency is improved.
【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 が存在しない場合或いは微量
しか存在しない場合は、排ガス中に規定の濃度のＳＯ2
をさらに注入して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 using a granular activated carbon moving bed for adsorbing / removing dioxins in exhaust gas, when SO 2 does not exist in the exhaust gas or when only a trace amount exists, the specified Concentration of SO 2
And harmful dioxins can be efficiently adsorbed and removed by simultaneously injecting dioxin and SO 2 gas in the exhaust gas.
【００１１】このように従来のダイオキシン類の吸着の
通念を打破し、排ガス中に規定の濃度、たとえば５０〜
１００ppmのＳＯ2を混ぜ合せることにより、ダイオキシ
ン類を効率的に吸着除去することができる。このように
排ガス中に適度にＳＯ2 が含まれていることを積極的に
利用するようにしたので、排ガス中からＳＯ2 を分離す
る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, the conventional wisdom of adsorbing dioxins is broken, and the exhaust gas has a specified concentration, for example, 50 to 50%.
By mixing 100 ppm of SO 2 , dioxins can be efficiently adsorbed and removed. As described above, since the fact that SO 2 is appropriately contained in the exhaust gas is positively used, the step of separating SO 2 from the exhaust gas can be omitted, and the process can be performed economically. Was also very advantageous.
【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】排ガス中に含まれるＳＯ2 が少い場合のダイオ
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 view of a method for performing a dioxin adsorption and removal method when SO 2 contained in exhaust gas is small.
【図３】さらに、ＳＯ2 が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 diagram of a method for performing a dioxin adsorption and removal method when the amount of SO 2 is small.
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 and removal device B desorption / decomposition tower C SO 2 storage tank
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/70 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 7 , DB name) B01D 53/70
Claims (2)
めに、ダイオキシンとＳＯ 2 ガスを同時に活性炭に吸着
する粒状活性炭移動層を備えたダイオキシン吸着除去装
置によるダイオキシン類の吸着除去方法であって、排ガ
ス中にＳＯ2 ガスが初めから存在する場合は、ダイオキ
シンとＳＯ 2 ガスを吸着した前記活性炭からダイオキシ
ンとＳＯ 2 ガスを脱離・分解処理する脱離分解塔で分解
されたＳＯ2 ガスを、前記脱離分解塔に配管された排ガ
スラインを経由して前記ダイオキシン吸着除去装置に戻
し、ＳＯ2ガスとダイオキシンとを同時に処理すること
を特徴とするダイオキシン類の吸着除去方法。1. To remove dioxins in exhaust gas , dioxin and SO 2 gas are simultaneously adsorbed on activated carbon.
Dioxin adsorbed and removed instrumentation having a granular activated carbon transfer layer for
A suction removal method of dioxins by location, if initially present is SO 2 gas in the exhaust gas, Daioki
Dioxin from the activated carbon adsorbing SO and SO 2 gas
Down and SO the desorption and decomposition process desorption decomposing column in decomposed SO 2 gas for 2 gas, the via to the dioxin adsorbed removing apparatus waste gas <br/> Surain which is plumbed to the desorption decomposing column And treating the SO 2 gas and dioxin at the same time.
めに、ダイオキシンとＳＯ 2 ガスを同時に活性炭に吸着
する粒状活性炭移動層を備えたダイオキシン吸着除去装
置によるダイオキシン類の吸着除去方法であって、排ガ
ス中に少量のＳＯ2 ガスしか存在しない場合又は排ガス
中にＳＯ2 ガスが存在しない場合は、ＳＯ2貯溜タンクか
らＳＯ2 ガスを排ガス中に注入して規定のＳＯ2濃度に制
御すると共に、ダイオキシンとＳＯ 2 ガスを吸着した前
記活性炭からダイオキシンとＳＯ 2 ガスを脱離・分解処
理する脱離分解塔で分解されたＳＯ2 ガスを、前記脱離
分解塔に配管された排ガスラインを経由して前記ダイオ
キシン吸着除去装置に戻し、ＳＯ2ガスとダイオキシン
とを同時に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。2. Dioxin and SO 2 gas are simultaneously adsorbed on activated carbon to remove dioxins in exhaust gas.
Dioxin adsorbed and removed instrumentation having a granular activated carbon transfer layer for
A suction removal method of dioxins by location, if the SO 2 gas is not present or if the exhaust gas only present a small amount of SO 2 gas in the exhaust gas injected from the SO 2 storage tank to SO 2 gas in the exhaust gas To the specified SO 2 concentration and before adsorbing dioxin and SO 2 gas.
Desorption and decomposition of dioxin and SO 2 gas from activated carbon
The SO 2 gas is decomposed with a leaving decomposing column that sense, the elimination
The diode <br/> relaxin returned to adsorption and removal apparatus, the adsorption method for removing dioxins, which comprises simultaneously processing and SO 2 gas and dioxins via exhaust gas line which is plumbed to decomposing column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00716298A JP3232336B2 (en) | 1998-01-19 | 1998-01-19 | Adsorption removal method of dioxins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00716298A JP3232336B2 (en) | 1998-01-19 | 1998-01-19 | Adsorption removal method of dioxins |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4075805A Division JPH0696092B2 (en) | 1992-02-28 | 1992-02-28 | Method for adsorption and removal of dioxins |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10211418A JPH10211418A (en) | 1998-08-11 |
| JP3232336B2 true JP3232336B2 (en) | 2001-11-26 |
Family
ID=11658392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00716298A Expired - Fee Related JP3232336B2 (en) | 1998-01-19 | 1998-01-19 | Adsorption removal method of dioxins |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3232336B2 (en) |
-
1998
- 1998-01-19 JP JP00716298A patent/JP3232336B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10211418A (en) | 1998-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |