JP3959592B2 - Dioxin adsorption activated carbon treatment method - Google Patents
Dioxin adsorption activated carbon treatment method Download PDFInfo
- Publication number
- JP3959592B2 JP3959592B2 JP2000354117A JP2000354117A JP3959592B2 JP 3959592 B2 JP3959592 B2 JP 3959592B2 JP 2000354117 A JP2000354117 A JP 2000354117A JP 2000354117 A JP2000354117 A JP 2000354117A JP 3959592 B2 JP3959592 B2 JP 3959592B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- dxn
- exhaust gas
- adsorbed
- dust collector
- 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
Images
Landscapes
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Chimneys And Flues (AREA)
- Gasification And Melting Of Waste (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、ダイオキシン（以下、ＤＸＮと略記する）を含む廃棄物焼却排ガスまたは廃棄物溶融排ガス中に集塵装置前流にて粉末活性炭を吹き込み、排ガスからＤＸＮを吸着除去する方法に関する。
【０００２】
【従来の技術】
近年、廃棄物焼却炉に代表される排ガスについてＤＸＮ排出規制が強化され、焼却能力４ｔ／ｈ以上の新設炉では０．１ｎｇ−ＴＥＱ／Ｎｍ３ の排出基準が定められた。また施設周辺住民からは、規制値より更に低濃度の排出が望まれつつある。このようなＤＸＮの高度な低減要求に対応する方法の一つとして、活性炭による吸着除去法、すなわちバグフィルタ前流に５０〜１００ｍｇ／Ｎｍ３ 以上の粉末活性炭を吹き込み、濾布上に活性炭層を形成させてＤＸＮを吸着除去する方法が開発されている。
【０００３】
活性炭を用いるＤＸＮ除去法には、ＤＸＮを吸着した活性炭の処理問題がある。これを施設外に排出する際、廃棄物焼却炉に係わる煤塵等の処理基準（３ｎｇ
−ＴＥＱ／ｇ）以上のＤＸＮが活性炭に吸着している場合には、ＤＸＮの分解処理を施す必要がある。このためＤＸＮ吸着活性炭の処理方法として、これを焼却炉に投入し焼却する方法が考えられている。
【０００４】
この焼却方法を採用する際、活性炭を完全燃焼させる必要がある。ここで十分に燃焼が進まなければ、活性炭に吸着しているＤＸＮは分解せずに、排ガス中に再び飛散することになり、また活性炭からｄｅ ｎｏｖｏ合成によりＤＸＮが生成し、排ガス中のＤＸＮ濃度を高める原因になる。
【０００５】
【発明が解決しようとする課題】
本発明の目的は、ＤＸＮを含む廃棄物焼却排ガスまたは廃棄物溶融排ガス処理に粉末活性炭を使用し、生じたＤＸＮ吸着活性炭を焼却処理するに当たり、ＤＸＮが吸着した活性炭を完全燃焼させる効果的な方法を提供することである。
【０００６】
【課題を解決するための手段】
本発明による処理方法は、
ＤＸＮを含む廃棄物焼却排ガスまたは廃棄物溶融排ガス中に集塵装置前流にて粉末活性炭を吹き込み、排ガスからＤＸＮを吸着除去する方法において、
集塵装置に捕集されたＤＸＮ吸着活性炭を液体燃料と混合し、得られた混合物スラリから固液分離によりダイオキシン類吸着活性炭を分離し、これを焼却炉、溶融炉、再燃焼室または施設煙道の高温部に送って、焼却処理することを特徴とするＤＸＮ吸着活性炭の処理方法である。
【０００７】
本発明による処理方法において、集塵装置は好ましくは電気集塵機またはバグフィルタである。活性炭は好ましくは粒子径５００μｍ以下の粉末活性炭である。液体燃料は好ましくはガソリン、灯油、軽油または重油である。ＤＸＮ吸着活性炭と液体燃料の混合比は重量で好ましくは１：１〜１：１００００００の範囲である。焼却前に固液分離により混合物スラリからＤＸＮ吸着活性炭を分離し、これを焼却処理することもできる。ＤＸＮ吸着活性炭と液体燃料の混合物を施設煙道の排ガス温度８００℃以上の高温部に設けられたバーナで焼却処理するのが好ましい。固液分離を好ましくは１〜５０μｍメッシュのスクリーンで行う。スラリから分離した液体燃料を再び、集塵装置に捕集されるＤＸＮ吸着活性炭の混合用液体燃料として使用することもできる。
【０００８】
【発明の実施の形態】
つぎに、本発明を実施例に基づいて具体的に説明する。
【０００９】
実施例１
図１と図２に、粉末活性炭を集塵装置前流でＤＸＮ含有排ガス中に吹き込み、排ガスからＤＸＮを活性炭に吸着除去させる方法を示す。
【００１０】
排ガス中に飛灰がほとんど存在しない系では、図１に示すように、集塵装置からＤＸＮ吸着活性炭を回収する。排ガス中に飛灰が存在する系では、図２に示すように、集塵装置の後流にバグフィルタを設け、そのバグフィルタでＤＸＮ吸着活性炭を回収する。
【００１１】
図３に示すように、集塵装置に捕集されたＤＸＮ吸着活性炭を灯油と混合し、得られた混合物をスラリ状態で焼却炉に送って、焼却炉壁面に設けたバーナに燃料として供給し、完全燃焼により焼却処理する。図３中、(1) は焼却炉、(2) はそのバーナ、(3) はボイラである。
【００１２】
図４に示すように、集塵装置に捕集されたＤＸＮ吸着活性炭を灯油と混合し、得られた混合物をスラリ状態で濾過槽(4) に送って、１０μｍメッシュのスクリーン(5) で濾過する。分離したＤＸＮ吸着活性炭を焼却炉内の前段側に投入し、ＤＸＮ吸着活性炭を、完全燃焼により焼却処理する。スラリから分離した灯油を再び、集塵装置に捕集されるＤＸＮ吸着活性炭の混合用に使用する。図４中、(1) は焼却炉、(3) はボイラである。
【００１３】
【発明の効果】
本発明の処理方法によれば、以下の効果を得ることができる。
【００１４】
ＤＸＮ吸着活性炭の輸送形態がスラリであるので、ＤＸＮ吸着活性炭のみの粉体対象に比べて、操作が容易にできる上に、輸送配管内で粉塵爆発の恐れがない。
【００１５】
活性炭は原料を１０００℃近い温度で賦活して製造するため、揮発分をほとんど含まず、燃焼が始まりにくいが、活性炭に灯油を混合することでそれが燃焼促進剤となり、ＤＸＮ吸着活性炭を完全燃焼させることができる。
【００１６】
ＤＸＮ吸着活性炭に灯油を混合することでＤＸＮ吸着活性炭が重くなり、その結果、投入の際、十分に燃焼していないＤＸＮ吸着活性炭が燃焼ガス流れに乗って飛散し煙道に流れ出ることを防ぐことができる。
【図面の簡単な説明】
【図１】 図１は、排ガス中に飛灰がほとんど存在しない系で粉末活性炭を集塵装置前流でＤＸＮ含有排ガス中に吹き込み、排ガスからＤＸＮを活性炭に吸着除去させる方法を示すフローシートである。
【図２】 図２は、排ガス中に飛灰が存在する系で粉末活性炭を集塵装置前流でＤＸＮ含有排ガス中に吹き込み、排ガスからＤＸＮを活性炭に吸着除去させる方法を示すフローシートである。
【図３】 図３は、ＤＸＮ吸着活性炭を灯油と混合し、混合物をスラリ状態で焼却炉に送って焼却処理する方法を示すフローシートである。
【図４】 図４は、ＤＸＮ吸着活性炭を灯油と混合し、混合物をスラリ状態で濾過槽に送って濾過し、分離したＤＸＮ吸着活性炭を焼却炉で焼却処理する方法を示すフローシートである。
【符号の説明】
(1) ：焼却炉
(2) ：バーナ
(3) ：ボイラ
(4) ：濾過槽
(5) ：スクリーン[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of adsorbing and removing DXN from exhaust gas by blowing powdered activated carbon into waste incineration exhaust gas or waste molten exhaust gas containing dioxin (hereinafter abbreviated as DXN) in a pre-dust collector upstream.
[0002]
[Prior art]
In recent years, DXN emission regulations have been strengthened for exhaust gas typified by waste incinerators, and an emission standard of 0.1 ng-TEQ / Nm 3 has been established for new furnaces with an incineration capacity of 4 t / h or more. In addition, residents around the facility are demanding emissions that are even lower than the regulated level. As one of the methods to meet such high DXN reduction requirement, adsorption / removal method using activated carbon, that is, powder activated carbon of 50-100 mg / Nm 3 or more is blown into the bag filter upstream, and an activated carbon layer is formed on the filter cloth. A method of forming and removing DXN by adsorption has been developed.
[0003]
The DXN removal method using activated carbon has a problem of treating activated carbon adsorbed with DXN. When this is discharged outside the facility, the standard for the treatment of dust, etc. related to waste incinerators (3 ng
-When TEQ / g) or more of DXN is adsorbed on the activated carbon, it is necessary to perform a DXN decomposition treatment. For this reason, as a method for treating DXN-adsorbed activated carbon, a method is considered in which this is put into an incinerator and incinerated.
[0004]
When employing this incineration method, it is necessary to completely burn the activated carbon. If the combustion does not proceed sufficiently here, DXN adsorbed on the activated carbon will not be decomposed and will be scattered again in the exhaust gas, and DXN will be generated from the activated carbon by de novo synthesis, and the DXN concentration in the exhaust gas will be It becomes a cause to raise.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to use powdered activated carbon for waste incineration exhaust gas or waste molten exhaust gas treatment containing DXN, and to incinerate the resulting DXN adsorption activated carbon, an effective method for completely burning the activated carbon adsorbed by DXN Is to provide.
[0006]
[Means for Solving the Problems]
Processing method that by the present invention,
In a method of injecting and removing DXN from waste gas by blowing powdered activated carbon into waste incineration exhaust gas or waste molten exhaust gas containing DXN in the upstream of the dust collector,
DXN adsorbed activated carbon collected in the dust collector is mixed with liquid fuel, and dioxin adsorbed activated carbon is separated from the resulting mixture slurry by solid-liquid separation. This is incinerator, melting furnace, recombustion chamber or facility smoke. It is a processing method of DXN adsorption activated carbon which is sent to the high temperature part of the road and incinerated.
[0007]
In treatment methods that by the present invention, the dust collecting device is preferably an electrostatic precipitator or bag filter. The activated carbon is preferably powdered activated carbon having a particle size of 500 μm or less. The liquid fuel is preferably gasoline, kerosene, light oil or heavy oil. The mixing ratio of DXN adsorbed activated carbon and liquid fuel is preferably in the range of 1: 1 to 1: 1000000 by weight. Prior to incineration, DXN-adsorbed activated carbon can be separated from the mixture slurry by solid-liquid separation and incinerated. It is preferable to incinerate the mixture of the DXN adsorbed activated carbon and the liquid fuel with a burner provided in a high temperature part having an exhaust gas temperature of 800 ° C. or higher in the facility flue. Solid-liquid separation is preferably performed on a 1-50 μm mesh screen. The liquid fuel separated from the slurry can be used again as a liquid fuel for mixing DXN adsorption activated carbon collected by the dust collector.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be specifically described based on examples.
[0009]
Example 1
1 and 2 show a method in which powdered activated carbon is blown into a DXN-containing exhaust gas upstream of the dust collector, and DXN is adsorbed and removed from the exhaust gas by the activated carbon.
[0010]
In a system where almost no fly ash is present in the exhaust gas, DXN adsorbed activated carbon is recovered from the dust collector as shown in FIG. In the system in which fly ash is present in the exhaust gas, as shown in FIG. 2, a bag filter is provided downstream of the dust collector, and the DXN adsorption activated carbon is recovered by the bag filter.
[0011]
As shown in FIG. 3, DXN adsorbed activated carbon collected in a dust collector is mixed with kerosene, and the resulting mixture is sent to an incinerator in a slurry state and supplied as fuel to a burner provided on the incinerator wall surface. Incinerate by complete combustion. In Fig. 3, (1) is an incinerator, (2) is its burner, and (3) is a boiler.
[0012]
As shown in FIG. 4, DXN adsorbed activated carbon collected in a dust collector is mixed with kerosene, and the resulting mixture is sent to a filter tank (4) in a slurry state and filtered through a 10 μm mesh screen (5). To do. The separated DXN adsorption activated carbon is thrown into the front side of the incinerator, and the DXN adsorption activated carbon is incinerated by complete combustion. The kerosene separated from the slurry is again used for mixing the DXN adsorption activated carbon collected in the dust collector. In Fig. 4, (1) is an incinerator and (3) is a boiler.
[0013]
【The invention's effect】
According to the processing method of the present invention, the following effects can be obtained.
[0014]
Since the transport form of the DXN-adsorbed activated carbon is a slurry, it can be operated more easily than a powder object of only DXN-adsorbed activated carbon, and there is no risk of dust explosion in the transport pipe.
[0015]
Activated carbon is manufactured by activating the raw material at a temperature close to 1000 ° C, so it hardly contains volatile components and combustion is difficult to start. However, mixing kerosene with activated carbon makes it a combustion accelerator, and DXN adsorption activated carbon is completely burned. Can be made.
[0016]
Mixing kerosene with DXN-adsorbed activated carbon makes DXN-adsorbed activated carbon heavier and, as a result, prevents unburned DXN-adsorbed activated carbon from splashing on the combustion gas flow and flowing out into the flue. Can do.
[Brief description of the drawings]
FIG. 1 is a flow sheet showing a method in which powdered activated carbon is blown into a DXN-containing exhaust gas upstream of a dust collector and DXN is adsorbed and removed from the exhaust gas in a system in which almost no fly ash is present in the exhaust gas. is there.
FIG. 2 is a flow sheet showing a method in which powdered activated carbon is blown into a DXN-containing exhaust gas upstream of a dust collector in a system where fly ash is present in the exhaust gas, and DXN is adsorbed and removed from the exhaust gas by the activated carbon. .
FIG. 3 is a flow sheet showing a method of mixing DXN-adsorbed activated carbon with kerosene and sending the mixture to an incinerator in a slurry state for incineration.
FIG. 4 is a flow sheet showing a method of mixing DXN adsorbed activated carbon with kerosene, sending the mixture to a filtration tank in a slurry state and filtering, and incinerating the separated DXN adsorbed activated carbon in an incinerator.
[Explanation of symbols]
(1): Incinerator
(2): Burner
(3): Boiler
(4): Filtration tank
(5): Screen
Claims (1)
集塵装置に捕集されたダイオキシン類吸着活性炭を液体燃料と混合し、得られた混合物スラリから固液分離によりダイオキシン類吸着活性炭を分離し、これを焼却炉、溶融炉、再燃焼室または施設煙道の高温部に送って、焼却処理することを特徴とするダイオキシン類吸着活性炭の処理方法。In a method for blowing and adsorbing powdered activated carbon in the waste incineration exhaust gas or waste molten exhaust gas containing dioxins upstream of the dust collector and adsorbing and removing dioxins from the exhaust gas,
Dioxin adsorption activated carbon collected in the dust collector is mixed with liquid fuel, and dioxin adsorption activated carbon is separated from the resulting mixture slurry by solid-liquid separation, which is then incinerator, melting furnace, recombustion chamber or facility A method for treating dioxin-adsorbed activated carbon, which is sent to a high temperature part of a flue and incinerated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000354117A JP3959592B2 (en) | 2000-11-21 | 2000-11-21 | Dioxin adsorption activated carbon treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000354117A JP3959592B2 (en) | 2000-11-21 | 2000-11-21 | Dioxin adsorption activated carbon treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002153838A JP2002153838A (en) | 2002-05-28 |
| JP3959592B2 true JP3959592B2 (en) | 2007-08-15 |
Family
ID=18826770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000354117A Expired - Fee Related JP3959592B2 (en) | 2000-11-21 | 2000-11-21 | Dioxin adsorption activated carbon treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3959592B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5379058B2 (en) * | 2010-03-29 | 2013-12-25 | 有限会社グリーニングラボラトリ | Hazardous substance processing apparatus and hazardous substance processing method |
| CN102258997B (en) * | 2011-05-19 | 2012-12-12 | 哈尔滨工业大学 | Manganese-loaded multiphase catalyst, and water treatment method for producing high-activity quinquevalent manganese by catalyzing ozone through same |
| CN103994449B (en) * | 2014-05-30 | 2016-05-25 | 江苏百纳环保设备有限公司 | A kind of compound emission-control equipment |
-
2000
- 2000-11-21 JP JP2000354117A patent/JP3959592B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002153838A (en) | 2002-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2003004211A (en) | Equipment and method for treating waste | |
| JP2005331172A (en) | Energy and valuable metal recovery system | |
| JP3959592B2 (en) | Dioxin adsorption activated carbon treatment method | |
| JP2895469B1 (en) | Method and apparatus for reducing dioxins in a melting furnace | |
| JP3986948B2 (en) | Contaminated soil purification method and contaminated soil purification device | |
| JPH11257619A (en) | City refuse combustion device | |
| JP4420155B2 (en) | Method and apparatus for recovering heat from waste | |
| RU2133408C1 (en) | Method of incineration of town refuse and use of ash formed after incineration | |
| KR200193917Y1 (en) | Device of removing dust from an incinerator | |
| JP2005195228A (en) | Waste material melting treatment system | |
| JPH11148631A (en) | Incinerator and incinerating method for contaminated soil or the like | |
| JPS6096823A (en) | Disposal of burning unsuitable refuse | |
| JPH10300043A (en) | Waste fuel combustion system and its processing method of collected substances by bag filter | |
| JP2000240932A (en) | Refuse incineration device equipped with removing means for dioxins | |
| JP3020912B2 (en) | Method and apparatus for immobilizing and decomposing dioxins with unburned ash | |
| CN218119763U (en) | Production rock wool is with burning temperature stable burning furnace that burns | |
| JPH08507601A (en) | Steel plant waste incineration method and device | |
| JP3225214B2 (en) | Equipment for treating exhaust gas, collected ash, etc. and its treatment method | |
| JP4122570B2 (en) | Exhaust gas treatment equipment for arc furnace | |
| JP2004237216A (en) | Method and system for waste disposal | |
| JP3869043B2 (en) | Exhaust gas treatment equipment in waste treatment equipment | |
| KR100383799B1 (en) | Device of reducing dust and dioxide from an incinerator | |
| JPH0225618A (en) | Refuse incinerator | |
| JP3965564B2 (en) | Treatment method of ash melting furnace output gas | |
| JP3950448B2 (en) | Method and apparatus for producing carbide from waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20050331 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060712 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070116 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070302 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070403 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070501 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110525 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110525 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120525 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130525 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140525 Year of fee payment: 7 |
|
| LAPS | Cancellation because of no payment of annual fees |