JPH07265834A - Treatment of fly ash by irradiation with microwave - Google Patents

Treatment of fly ash by irradiation with microwave

Info

Publication number
JPH07265834A
JPH07265834A JP6062757A JP6275794A JPH07265834A JP H07265834 A JPH07265834 A JP H07265834A JP 6062757 A JP6062757 A JP 6062757A JP 6275794 A JP6275794 A JP 6275794A JP H07265834 A JPH07265834 A JP H07265834A
Authority
JP
Japan
Prior art keywords
fly ash
activated carbon
exhaust gas
microwave irradiation
dioxins
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.)
Granted
Application number
JP6062757A
Other languages
Japanese (ja)
Inventor
Keizo Hamaguchi
敬三 浜口
Yoji Ogaki
陽二 大垣
Hiroshi Yamaguchi
宏 山口
Keiichi Okuyama
契一 奥山
Sazo Nakamura
佐三 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP6062757A priority Critical patent/JPH07265834A/en
Publication of JPH07265834A publication Critical patent/JPH07265834A/en
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To make the waste combustion gases and fly ash discharged from combustible waste product incineration facilities harmless. CONSTITUTION:An unburned carbon quantity in the fly ash adsorbed with heavy metals in the exhaust gas and dioxins on active carbon is reduced to 1.0-5% and the fly ash is heated by irradiation with microwave. Thus a heating time of the fly ash is shortened and the harmful substances such as dioxins are made harmless.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、都市ごみ焼却施設およ
びその他の可燃性廃棄物焼却施設から排出される燃焼排
ガスおよび飛灰の無害化処理方法に関する発明である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detoxifying combustion exhaust gas and fly ash discharged from municipal waste incineration facilities and other combustible waste incineration facilities.

【0002】[0002]

【従来の技術】従来、ごみ焼却炉から排出される飛灰お
よび排ガスには、非常に毒性の強いダイオキシン類等
や、クロロベンゼン、クロロフェノール等のダイオキシ
ン類前駆物質などの有機塩素化合物が含まれている。前
述の飛灰または排ガス中に含まれるダイオキシン類を無
害化する方法として以下の技術が開示されている。
2. Description of the Related Art Conventionally, fly ash and exhaust gas discharged from refuse incinerators contain highly toxic dioxins and organochlorine compounds such as dioxin precursors such as chlorobenzene and chlorophenol. There is. The following techniques are disclosed as a method for detoxifying the dioxins contained in the above-mentioned fly ash or exhaust gas.

【0003】まず、短時間で加熱が得られ温度コントロ
ールが容易なマイクロ波により有害有機塩素化合物を除
去する方法として、以下の公開特許公報が開示されてい
る。特開平4−284885号公報には、焼却灰に60
秒間マイクロ波を照射し、次いでこれを30秒間攪拌
し、該マイクロ波の照射と攪拌とを順次繰り返し、焼却
灰を例えば500℃に昇温して過熱、溶融することなく
有害有機塩素化合物を分解、除去する「ごみ焼却灰の再
処理方法」が開示されている。また、活性炭によりごみ
燃焼排ガス中のダイオキシン類を除去する方法は、以下
の公開特許公報に開示されている。
First, as a method for removing harmful organochlorine compounds by microwaves which can be heated in a short time and whose temperature can be easily controlled, the following publications have been disclosed. Japanese Patent Laid-Open No. 4-284885 discloses a method for burning incinerated ash with 60
Microwave irradiation for 2 seconds, then this is stirred for 30 seconds, microwave irradiation and stirring are sequentially repeated, and the incinerated ash is heated to, for example, 500 ° C. to decompose harmful organic chlorine compounds without overheating and melting. , "Reprocessing method of refuse incineration ash" to remove is disclosed. Further, a method for removing dioxins in waste combustion exhaust gas with activated carbon is disclosed in the following patent publications.

【0004】特開平4−87624号公報には、バグフ
ィルターろ布表面に粉末活性炭の粉体層を形成させ、燃
焼排ガスをこの粉体層を通すことにより有害物を除去す
る。特開平4−277006号公報には、噴霧塔の上部
から紛状活性炭を供給し、下方から排ガスを導入して活
性炭と排ガスを接触させて有害物を除去する。
In Japanese Patent Laid-Open No. 4-87624, a powder layer of powdered activated carbon is formed on the surface of a bag filter filter cloth, and harmful substances are removed by passing combustion exhaust gas through this powder layer. In Japanese Unexamined Patent Publication No. 4-277006, powdered activated carbon is supplied from the upper part of a spray tower, and exhaust gas is introduced from the lower side to bring the activated carbon into contact with the exhaust gas to remove harmful substances.

【0005】しかしながら、前述の従来公開特許公報に
開示されている技術においては、以下の問題点があっ
た。
However, the technique disclosed in the above-mentioned Japanese Patent Laid-Open Publication has the following problems.

【0006】[0006]

【発明が解決しようとする課題】ごみ等の焼却施設から
排出される飛灰は、炉の燃焼状態が良好であれば、一般
に未燃炭素含有量は1%以下と、かなり低い値である。
従って、このような飛灰に前述の特開平4−28488
5号公報に開示される方法でマイクロ波を照射しても、
飛灰中の未燃炭素含有量が少ないために、有効なマイク
ロ波照射効果が得られない欠点がある。即ち、ダイオキ
シン類等の有機塩素化合物の分解に必要な400℃〜6
00℃の温度域に昇温することは困難である。
The fly ash discharged from the incineration facility for refuse and the like generally has a considerably low unburned carbon content of 1% or less if the combustion state of the furnace is good.
Therefore, the above-mentioned Japanese Laid-Open Patent Publication No.
Even if the microwave is irradiated by the method disclosed in Japanese Patent No. 5,
Since the content of unburned carbon in fly ash is small, there is a drawback that an effective microwave irradiation effect cannot be obtained. That is, 400 ° C to 6 required for decomposition of organic chlorine compounds such as dioxins.
It is difficult to raise the temperature to a temperature range of 00 ° C.

【0007】また、前述の特開平4−87624号公報
および特開平4−277006号公報に開示されている
方法においては、燃焼排ガス中のダイオキシン類等の有
機塩素化合物および水銀等の重金属は、吸着除去され、
燃焼排ガスは無害化される。しかしながら、ダイオキシ
ン等の有機塩素化合物および水銀等の重金属は活性炭に
吸着されるので、活性炭中のダイオキシン濃度は上昇
し、該活性炭を含有する飛灰中のダイオキシン類等の有
害物質の濃度が上昇してしまうことになり、該活性炭等
を含む飛灰は無害化されない問題点があった。
In the methods disclosed in the above-mentioned JP-A-4-87624 and JP-A-4-277006, organic chlorine compounds such as dioxins in combustion exhaust gas and heavy metals such as mercury are adsorbed. Removed,
The combustion exhaust gas is rendered harmless. However, since organic chlorine compounds such as dioxins and heavy metals such as mercury are adsorbed on activated carbon, the concentration of dioxins in activated carbon increases, and the concentration of harmful substances such as dioxins in fly ash containing the activated carbon increases. The fly ash containing the activated carbon or the like is not harmless.

【0008】[0008]

【課題を解決するための手段】本発明は、第1に、集塵
機の前か、あるいは有害排ガス処理装置の前の排煙道に
活性炭を吹込み、集塵される飛灰の未燃炭素量を1.0
%〜5%にし、前記飛灰をマイクロ波照射によって加熱
処理することを特徴とするマイクロ波照射による飛灰処
理方法であり、第2に、活性炭の吹込量は、燃焼排ガス
に対して、0.05g/m3 N以上であることを特徴と
するマイクロ波照射による飛灰処理方法であり、第3
に、マイクロ波照射による飛灰加熱温度は400℃〜6
00℃であることを特徴とするマイクロ波照射による飛
灰処理方法を提供するものである。
The present invention is, firstly, the amount of unburned carbon in fly ash collected by blowing activated carbon into a smoke exhaust passage in front of a dust collector or in front of a harmful exhaust gas treatment device. To 1.0
% To 5%, and the fly ash is heat-treated by microwave irradiation, which is a method for fly ash treatment by microwave irradiation. Secondly, the blowing amount of activated carbon is 0 with respect to combustion exhaust gas. A fly ash treatment method by microwave irradiation, characterized in that the amount is 0.05 g / m 3 N or more.
In addition, the heating temperature of fly ash by microwave irradiation is 400 ° C to 6 ° C.
The present invention provides a method for treating fly ash by microwave irradiation, which is characterized in that the temperature is 00 ° C.

【0009】[0009]

【作用】本発明は、活性炭等のカーボン粉末を0.05
g/m3N以上吹き込み、まず、排ガス中の水銀等の重
金属類、ダイオキシン類等の有機塩素化合物を活性炭に
吸着除去させて集塵機を通過した排ガスを無害化する。
この際の活性炭の吹き込み位置は、集塵機の前であれ
ば、有害ガス除去装置の前の排煙道でも構わない。
The present invention uses carbon powder such as activated carbon in an amount of 0.05
After blowing in g / m 3 N or more, first, the heavy metals such as mercury in the exhaust gas and the organic chlorine compounds such as dioxins are adsorbed and removed by the activated carbon to render the exhaust gas passing through the dust collector harmless.
The blowing position of the activated carbon at this time may be the smoke exhaust passage in front of the harmful gas removing device as long as it is in front of the dust collector.

【0010】次に、活性炭の吹き込みによって、当該施
設から排出される飛灰は、未燃炭素量が上昇し、マイク
ロ波照射で飛灰を加熱する。本発明における未燃炭素と
は単体のカーボンおよび有機炭素を言い、CO2 、Ca
C03 等の無機炭素を含まないものである。
Next, the amount of unburned carbon in the fly ash discharged from the facility is increased by blowing the activated carbon, and the fly ash is heated by microwave irradiation. Unburned carbon in the present invention means simple carbon and organic carbon, such as CO 2 , Ca
Those that do not contain inorganic carbon of C0 3, and the like.

【0011】活性炭の吹き込み量は、飛灰に対して未燃
炭素量が重量比で1.0%以上でよい。望ましくは、
1.0〜5.0%が適当であり、1.0%以下では、マ
イクロ波による加熱効果が顕著に現れず不適当であり、
5.0%以上ではマイクロ波による加熱効果の上昇が期
待できないことと、活性炭の吹き込み量が多くなりコス
ト的にも不利となり不適当である。飛灰の性状によって
は、活性炭を吹き込まなくても、未燃炭素量が1%以上
の飛灰もあり、このような飛灰に対しては、活性炭の吹
き込み量は、極微量でもマイクロ波照射による有効な加
熱処理を可能にする。
The amount of activated carbon blown in may be 1.0% or more by weight of unburned carbon with respect to fly ash. Desirably,
1.0 to 5.0% is suitable, and if it is 1.0% or less, the heating effect by microwaves is not significant and is unsuitable.
If it is 5.0% or more, the heating effect due to microwaves cannot be expected to increase, and the amount of activated carbon blown in is large, which is disadvantageous in terms of cost and is not suitable. Depending on the properties of fly ash, there is fly ash with an unburned carbon content of 1% or more without blowing activated carbon. For such fly ash, even if the amount of activated carbon blown is extremely small, microwave irradiation is performed. Enables effective heat treatment by.

【0012】但し、この場合、あまりに微量すぎると、
活性炭による排ガス中のダイオキシン類等の吸着が効果
的に行われないため、集塵機を通過した後の排ガスの無
害化が損なわれる恐れがある。この場合も活性炭の吹き
込み量は、燃焼排ガスに対して0.05g/m3N以上
となるように吹き込むことが望ましい。
However, in this case, if the amount is too small,
Since the activated carbon does not effectively adsorb dioxins and the like in the exhaust gas, detoxification of the exhaust gas after passing through the dust collector may be impaired. Also in this case, it is desirable that the amount of activated carbon blown into the combustion exhaust gas be 0.05 g / m 3 N or more.

【0013】マイクロ波照射による飛灰加熱は、飛灰が
400〜600℃になるように照射する。400℃以下
であるとダイオキシン類の熱分解に不適当であるし、6
00℃以上にすると飛灰の部分溶融が始まり好ましくな
いことと、余分な熱量を使うためエネルギー効率的に好
ましくないため不適当である。
The fly ash is heated by microwave irradiation so that the fly ash is heated to 400 to 600 ° C. If it is 400 ° C or lower, it is unsuitable for the thermal decomposition of dioxins.
If the temperature is higher than 00 ° C., partial melting of fly ash begins to be unfavorable, and an excessive amount of heat is used, which is not preferable in terms of energy efficiency.

【0014】[0014]

【実施例】図1は、本発明における都市ごみ焼却施設等
の可燃性廃棄物焼却施設の排煙道に活性炭を吹き込む位
置の一例を示した概略図である。図2は、本発明におけ
るマイクロ波照射により飛灰を加熱した場合の該マイク
ロ波照射時間、および飛灰中の未燃炭素含有量と飛灰温
度との関係を示した図である。図1において、1は都市
ごみ焼却施設等の可燃性廃棄物焼却炉に連結される廃熱
ボイラー、2は塩素ガス、亜硫酸ガス、窒素酸化ガス等
の有害排ガス処理装置、3は集塵機、4は浄化された排
ガスを大気に拡散させる煙突である。
EXAMPLE FIG. 1 is a schematic diagram showing an example of a position where activated carbon is blown into a smoke exhaust passage of a combustible waste incineration facility such as a municipal solid waste incinerator according to the present invention. FIG. 2 is a diagram showing the microwave irradiation time when the fly ash is heated by microwave irradiation in the present invention, and the relationship between the unburned carbon content in the fly ash and the fly ash temperature. In FIG. 1, 1 is a waste heat boiler connected to a combustible waste incinerator such as a municipal waste incinerator, 2 is a toxic exhaust gas treatment device for chlorine gas, sulfurous acid gas, nitrogen oxide gas, etc., 3 is a dust collector, and 4 is It is a chimney that diffuses the purified exhaust gas into the atmosphere.

【0015】本発明における活性炭の吹き込み位置は、
集塵機3の上流側、即ち、活性炭が燃焼しない位置であ
れば良く、一例として、有害排ガス処理装置2の上流位
置Aか、または、集塵機3の上流位置Bが望ましい。有
害排ガス処理装置2の設備を有しない可燃性廃棄物焼却
施設においては、集塵機3の上流位置B側が望ましい。
当該吹き込み位置からの活性炭の吹き込みにより、排
ガスは排ガス中の重金属およびダイオキシン類等の有害
物質を活性炭が吸着し、無害化状態となる。一方、活性
炭の一部で紛状のものは飛灰となり、また、未燃炭素と
して飛灰中に残存する。
The activated carbon blowing position in the present invention is
It suffices if it is located upstream of the dust collector 3, that is, at a position where activated carbon does not burn, and as an example, the upstream position A of the harmful exhaust gas treatment device 2 or the upstream position B of the dust collector 3 is desirable. In a combustible waste incineration facility that does not have the facility of the harmful exhaust gas treatment device 2, the upstream position B side of the dust collector 3 is desirable.
By blowing the activated carbon from the blowing position, the activated carbon adsorbs harmful substances such as heavy metals and dioxins in the exhaust gas, so that the exhaust gas is rendered harmless. On the other hand, a part of the activated carbon in powder form becomes fly ash, and remains as unburned carbon in the fly ash.

【0016】本発明は、飛灰中の未燃炭素がマイクロ波
を効果的に吸収し、この結果、誘電加熱が起こり、伝熱
効果により飛灰全体を加熱するものである。飛灰中の未
燃炭素量が少なすぎると、マイクロ波が未燃炭素に効果
的照射されず、誘電加熱が効果的に行われない。
In the present invention, unburned carbon in fly ash effectively absorbs microwaves, and as a result, dielectric heating occurs and the entire fly ash is heated by the heat transfer effect. If the amount of unburned carbon in fly ash is too small, the unburned carbon is not effectively irradiated with microwaves, and dielectric heating is not performed effectively.

【0017】本発明の図2における実験では、活性炭を
添加した飛灰は100gであり、マイクロ波は5W/g
の照射エネルギーで行った。マイクロ波を照射する際、
飛灰が部分的に高温とならないように攪拌しながら加熱
を行った。
In the experiment of FIG. 2 of the present invention, the amount of fly ash added with activated carbon was 100 g, and the microwave was 5 W / g.
With the irradiation energy of. When irradiating with microwave
Heating was performed while stirring so that the fly ash did not reach a high temperature in part.

【0018】活性炭を添加する前の飛灰中の未燃炭素量
は、0.5%であり、活性炭を添加することで飛灰中の
未燃炭素含有量を調整した。未燃炭素が1.0%以上に
なるように活性炭を添加すると、活性炭が添加された飛
灰はマイクロ波照射によって500℃程度になることか
ら、ダイオキシン類等の有機塩素化合物を分解するため
には、添加する活性炭の量は、飛灰中の未燃炭素量が
1.0%以上になる量が必要である。未燃炭素量を5%
以上とすると、飛灰の温度上昇の割合が増大しないこと
と、余分な活性炭を使用するため、コスト高となる。
The unburned carbon content in the fly ash before the addition of activated carbon was 0.5%, and the unburned carbon content in the fly ash was adjusted by adding the activated carbon. When activated carbon is added so that unburned carbon becomes 1.0% or more, fly ash containing activated carbon becomes about 500 ° C. by microwave irradiation. Therefore, in order to decompose organic chlorine compounds such as dioxins. As for the amount of activated carbon to be added, it is necessary that the amount of unburned carbon in fly ash be 1.0% or more. 5% unburned carbon
In the above case, the rate of increase in the temperature of fly ash does not increase, and since extra activated carbon is used, the cost increases.

【0019】活性炭を添加した飛灰が400℃〜600
℃になるためには、マイクロ波照射エネルギー5W/g
のエネルギーで10分のマイクロ波照射時間が必要であ
った。それ以上の長時間照射しても温度上昇は小であっ
た。
Fly ash to which activated carbon is added is 400 ° C to 600 ° C.
Microwave irradiation energy of 5 W / g
Energy required a microwave irradiation time of 10 minutes. Even after irradiation for a longer time, the temperature rise was small.

【0020】図3は、活性炭吹込による集塵機後の排ガ
ス中のダイオキシン類の濃度および水銀濃度を示した図
である。活性炭吹込量0.05g/m3 N以上において
集塵機を通過した燃焼排ガス中のダイオキシン類の濃度
および水銀濃度が急激に減少することから、吹込量0.
05g/m3 N以上で、集塵機を通過した燃焼排ガスの
無害化に大きな効果がある。活性炭吹込量0.05g/
3 Nは、およそ飛灰中の未燃炭素0.5%〜1.0%
に相当する。
FIG. 3 is a diagram showing the concentration of dioxins and the concentration of mercury in the exhaust gas after the dust collector by blowing activated carbon. When the activated carbon injection amount was 0.05 g / m 3 N or more, the concentration of dioxins and the mercury concentration in the combustion exhaust gas that passed through the dust collector drastically decreased.
When it is 05 g / m 3 N or more, it is very effective in detoxifying combustion exhaust gas that has passed through the dust collector. Activated carbon injection amount 0.05g /
m 3 N is approximately 0.5% to 1.0% of unburned carbon in fly ash
Equivalent to.

【0021】表1は、マイクロ波照射によって加熱され
た飛灰のダイオキシン類の濃度を示した表である。
Table 1 is a table showing the concentration of dioxins in fly ash heated by microwave irradiation.

【0022】[0022]

【表1】 [Table 1]

【0023】表1においては、未燃炭素量が2%となる
ように活性炭を添加したもので、マイクロ波のエネルギ
ーが5W/g、照射時間10分で、温度は520℃まで
昇温し、さらに、当該温度で10分保持させた。この結
果から、マイクロ波照射により、飛灰中のダイオキシン
類は完全に無害化された。
In Table 1, activated carbon was added so that the amount of unburned carbon was 2%, the microwave energy was 5 W / g, the irradiation time was 10 minutes, and the temperature was raised to 520 ° C. Furthermore, the temperature was maintained for 10 minutes. From this result, dioxins in fly ash were completely rendered harmless by microwave irradiation.

【0024】本発明において、マイクロ波の照射による
加熱とは、例えば、2.45GHzの周波数を用いる高周
波誘電加熱をいう。マイクロ波加熱装置は、特に限定し
ないが、望ましくは、飛灰を攪拌しながら徐々に昇温
し、飛灰が均一に400℃〜600℃域に10分以上保
持できるような装置が望ましい。但し、飛灰に対して、
マイクロ波照射エネルギーは、飛灰の部分的高温化を避
けるため、5W/g以下が望ましく、飛灰加熱部は、ダ
イオキシン分解に有利な窒素雰囲気であることが望まし
いが、特に限定しない。飛灰加熱の際に、マイクロ波照
射加熱装置内で重金属等を含んだ微量の有害ガスが発生
する場合には、装置にパージファン等を設けて、別途、
無害化処理すればよい。
In the present invention, the heating by irradiation with microwaves means high frequency dielectric heating using a frequency of 2.45 GHz, for example. The microwave heating device is not particularly limited, but it is desirable to use a device capable of gradually raising the temperature of the fly ash while stirring it and keeping the fly ash uniformly in the 400 to 600 ° C. range for 10 minutes or more. However, for fly ash,
The microwave irradiation energy is preferably 5 W / g or less in order to avoid a partial increase in temperature of fly ash, and the fly ash heating section is preferably a nitrogen atmosphere advantageous for dioxin decomposition, but is not particularly limited. When a small amount of harmful gas containing heavy metals is generated in the microwave irradiation heating device during fly ash heating, install a purge fan etc. in the device and separately
It may be detoxified.

【0025】[0025]

【発明の効果】本発明によれば、集塵機に至る前の排煙
道に活性炭を吹込むことにより、排ガス中の有害なダイ
オキシン類および重金属等を吸着除去し、排ガスが無害
化される。同時に、集塵機等から排出される飛灰は、活
性炭の吹込により飛灰中の未燃炭素濃度が上昇し、マイ
クロ波照射による飛灰加熱処理を容易にする。
According to the present invention, the activated carbon is blown into the smoke exhaust passage before reaching the dust collector, so that harmful dioxins and heavy metals contained in the exhaust gas are adsorbed and removed, and the exhaust gas is rendered harmless. At the same time, in the fly ash discharged from the dust collector or the like, the concentration of unburned carbon in the fly ash increases due to the blowing of activated carbon, which facilitates the fly ash heat treatment by microwave irradiation.

【0026】さらに、未燃炭素を含有する飛灰をマイク
ロ波で照射することによって、400℃〜600℃に1
0分以上加熱保持することで、飛灰中のダイオキシン類
等の有機塩素化合物が分解され無害化される。
Further, the fly ash containing unburned carbon is irradiated with microwaves to 400 ° C. to 600 ° C.
By heating and holding for 0 minutes or more, organic chlorine compounds such as dioxins in fly ash are decomposed and rendered harmless.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明における都市ごみ焼却施設等の可燃性廃
棄物焼却施設の排ガス道に活性炭を吹き込む位置を示し
た概略図である。
FIG. 1 is a schematic view showing a position where activated carbon is blown into an exhaust gas passage of a combustible waste incineration facility such as a municipal solid waste incinerator according to the present invention.

【図2】本発明に係る飛灰中の未燃炭素含有量と飛灰温
度との関係を示す図面である。
FIG. 2 is a drawing showing the relationship between the unburned carbon content in fly ash and the fly ash temperature according to the present invention.

【図3】活性炭の吹込量とダイオキシン類、水銀等の濃
度を示す図面である。
FIG. 3 is a drawing showing the amount of activated carbon injected and the concentrations of dioxins, mercury, and the like.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 B01D 53/70 // A62D 3/00 ZAB B01D 53/34 134 E B09B 3/00 ZAB 303 L (72)発明者 奥山 契一 東京都千代田区丸の内一丁目1番2号 日 本鋼管株式会社内 (72)発明者 中村 佐三 東京都千代田区丸の内一丁目1番2号 日 本鋼管株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical display location B01D 53/70 // A62D 3/00 ZAB B01D 53/34 134 E B09B 3/00 ZAB 303 L ( 72) Inventor Keiichi Okuyama 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan KK (72) Inventor Sazo Nakamura 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan KK

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】可燃性廃棄物焼却施設における集塵機の上
流側の燃焼排ガスに活性炭を吹込み、集塵される飛灰の
未燃炭素量を1.0%〜5%にし、前記飛灰をマイクロ
波照射によって加熱処理することを特徴とするマイクロ
波照射による飛灰処理方法。
1. An activated carbon is blown into the combustion exhaust gas upstream of a dust collector in a combustible waste incinerator facility so that the amount of unburned carbon in the fly ash collected is 1.0% to 5%. A method of fly ash treatment by microwave irradiation, which comprises heat treatment by microwave irradiation.
【請求項2】活性炭の吹込量は、燃焼排ガスに対して、
0.05g/m3 N以上であることを特徴とする請求項
1記載のマイクロ波照射による飛灰処理方法。
2. The amount of activated carbon blown into the combustion exhaust gas is
The method of fly ash treatment by microwave irradiation according to claim 1, wherein the method is 0.05 g / m 3 N or more.
【請求項3】マイクロ波照射による飛灰加熱温度は40
0℃〜600℃であることを特徴とする請求項1または
請求項2記載のマイクロ波照射による飛灰処理方法。
3. The fly ash heating temperature by microwave irradiation is 40.
It is 0 degreeC-600 degreeC, The fly ash processing method by microwave irradiation of Claim 1 or Claim 2 characterized by the above-mentioned.
JP6062757A 1994-03-31 1994-03-31 Treatment of fly ash by irradiation with microwave Granted JPH07265834A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6062757A JPH07265834A (en) 1994-03-31 1994-03-31 Treatment of fly ash by irradiation with microwave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6062757A JPH07265834A (en) 1994-03-31 1994-03-31 Treatment of fly ash by irradiation with microwave

Publications (1)

Publication Number Publication Date
JPH07265834A true JPH07265834A (en) 1995-10-17

Family

ID=13209598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6062757A Granted JPH07265834A (en) 1994-03-31 1994-03-31 Treatment of fly ash by irradiation with microwave

Country Status (1)

Country Link
JP (1) JPH07265834A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002097330A1 (en) * 2001-06-01 2002-12-05 Emr Microwave Technology Corporation A method of reducing carbon levels in fly ash
JP2003226512A (en) * 2001-11-28 2003-08-12 Ueda Shikimono Kojo:Kk Photocatalytic activated carbon, colored photocatalytic activated carbon, coloring activated carbon, deodorant and/adsorption product using them, and soil cleaning method
DE102010022400A1 (en) * 2010-06-01 2011-12-01 Outotec Oyj Process and plant for lowering the residual carbon content of ash
JP2022103014A (en) * 2020-12-25 2022-07-07 世苑 柯 Waste treatment furnace and treatment equipment with it

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002097330A1 (en) * 2001-06-01 2002-12-05 Emr Microwave Technology Corporation A method of reducing carbon levels in fly ash
JP2003226512A (en) * 2001-11-28 2003-08-12 Ueda Shikimono Kojo:Kk Photocatalytic activated carbon, colored photocatalytic activated carbon, coloring activated carbon, deodorant and/adsorption product using them, and soil cleaning method
DE102010022400A1 (en) * 2010-06-01 2011-12-01 Outotec Oyj Process and plant for lowering the residual carbon content of ash
DE102010022400B4 (en) * 2010-06-01 2013-04-25 Outotec Oyj Process and plant for lowering the residual carbon content of ash
US8876969B2 (en) 2010-06-01 2014-11-04 Outotec Oyj Process and plant for lowering the residual carbon content of ash
JP2022103014A (en) * 2020-12-25 2022-07-07 世苑 柯 Waste treatment furnace and treatment equipment with it

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