JPH01212811A - Drying and incinerating of highly humid waste - Google Patents
Drying and incinerating of highly humid wasteInfo
- Publication number
- JPH01212811A JPH01212811A JP3737188A JP3737188A JPH01212811A JP H01212811 A JPH01212811 A JP H01212811A JP 3737188 A JP3737188 A JP 3737188A JP 3737188 A JP3737188 A JP 3737188A JP H01212811 A JPH01212811 A JP H01212811A
- Authority
- JP
- Japan
- Prior art keywords
- drying
- combustion
- furnace
- slurry
- incinerating
- 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
- 238000001035 drying Methods 0.000 title claims abstract description 65
- 239000002699 waste material Substances 0.000 title claims description 13
- 238000002485 combustion reaction Methods 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000010802 sludge Substances 0.000 claims description 24
- 238000000926 separation method Methods 0.000 claims description 8
- 239000000567 combustion gas Substances 0.000 claims description 7
- 230000005587 bubbling Effects 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract 8
- 238000007599 discharging Methods 0.000 abstract 1
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 26
- 239000002956 ash Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、公共下水道又は流域下水道の終末処理場の処
理過程において生じる汚泥等の高湿分廃棄物の乾燥・焼
却方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for drying and incinerating high-humidity waste such as sludge generated during the treatment process of a final treatment plant for public sewers or regional sewers.
［従来の技術］
従来のこの種の高湿分廃棄物の乾燥・焼却方法は、多段
炉やバブリング型流動床が使用されていた。[Prior Art] Conventional methods for drying and incinerating this type of high-humidity waste have used multistage furnaces and bubbling fluidized beds.
多段炉によるものは、炉内に配設した多段の棚の最上部
に装入された汚泥が、下から吹上げられる熱風により燃
焼し、徐々に上段の棚から下段の棚に移動する間にフラ
イアッシュ化する乾燥・焼却方法である。In the case of a multi-stage furnace, sludge is charged to the top of the multi-stage shelves installed in the furnace, is burned by hot air blown up from below, and gradually moves from the upper shelf to the lower shelf. This is a drying and incineration method that turns it into fly ash.
他方、バブリング型流動床によるものは、炉上部より汚
泥を供給し、層内で流動化乾燥及び燃焼によりフライア
ッシュ化する乾燥・焼却方法である。On the other hand, the method using a bubbling fluidized bed is a drying/incineration method in which sludge is supplied from the upper part of the furnace and is turned into fly ash by fluidization drying and combustion within the bed.
［発明が解決しようとする課題］
しかし、上記従来技術による高湿分廃棄物の乾燥・焼却
方法においては、熱回収について十分な配慮がないため
、熱効率が低く、処理工程のレイアウトが充分に考慮さ
れていないため、処理能力が低く、また飛散量が多いな
どの問題があった。[Problems to be solved by the invention] However, in the drying and incineration method of high-humidity waste according to the above-mentioned conventional technology, there is no sufficient consideration for heat recovery, resulting in low thermal efficiency, and the layout of the treatment process has not been sufficiently considered. As a result, there were problems such as low processing capacity and a large amount of scattering.
本発明は、これら従来技術の問題点に鑑みてこれを解決
するために創案されたもので、汚泥の乾燥・焼却性状を
考慮した最適の循環流動層をそのまま利用する高湿分廃
棄物の乾燥・焼却方法を提供することを第１の目的とし
、効率のよい乾燥・焼却方法を提供することを第２の目
的とする。The present invention was devised in order to solve these problems in the conventional technology, and it is a method for drying high-humidity waste using an optimal circulating fluidized bed that takes into consideration the drying and incineration properties of sludge. - The first purpose is to provide an incineration method, and the second purpose is to provide an efficient drying and incineration method.
［課題を解決するための手段］
上記目的を達成するために、第１の発明は、脱水汚泥を
減率乾燥域まで乾燥させる乾燥工程と、上記乾燥工程で
乾燥された汚泥°を流動化させながら燃焼させる燃焼工
程と、上記燃焼工程で生成される未燃物と燃焼ガスとを
分離させる分離工程と、上記分離工程で分離された未燃
物を上記燃焼工程に戻し、この燃焼工程で生成される燃
焼灰を外部に取出すよう構成したものである。[Means for Solving the Problems] In order to achieve the above object, the first invention includes a drying step of drying dehydrated sludge to a lapse rate drying region, and a fluidizing of the sludge dried in the drying step. a combustion process in which the unburned substances generated in the combustion process are separated from the combustion gas; and a separation process in which the unburnt substances separated in the separation process are returned to the combustion process, and the unburnt substances generated in the combustion process are The structure is designed to take out the combustion ash to the outside.
第２の発明は、第１の発明に加えて分離工程で分離され
た燃焼ガスを熱交換して乾燥工程に導入すると共に熱交
換した空気を燃焼工程に導入して熱利用するよう構成し
たものである。A second invention is one in which, in addition to the first invention, the combustion gas separated in the separation process is heat-exchanged and introduced into the drying process, and the heat-exchanged air is introduced into the combustion process for heat utilization. It is.
［作 用コ
上記第１の発明の構成において、脱水汚泥が乾燥工程で
減率乾燥域まで乾燥されると、その汚泥が流動し易い状
態になって、気圧の低くなっている燃焼工程の行われる
側への移動が促進され、そこで、燃焼した汚泥は灰とな
って下方へ取り出され、未燃物は燃焼ガスと共に分離工
程側へ送給され、そこで分離された未燃物は燃焼工程側
へ送給され乾燥工程側から送給されてくる汚泥に混って
燃焼される動作が繰返される。[Function] In the structure of the first invention described above, when the dehydrated sludge is dried to the lapse rate drying region in the drying process, the sludge becomes easily fluid and the combustion process where the atmospheric pressure is low is performed. There, the combusted sludge becomes ash and is taken out downward, and the unburned materials are sent to the separation process side along with the combustion gas, and the unburned materials separated there are transferred to the combustion process side. The operation in which the sludge is mixed with the sludge fed from the drying process side and burned is repeated.
また、上記第２の発明の構成において、分離工程で未燃
物又はフライアッシュと分離された燃焼排ガスは熱交換
されて乾燥工程と燃焼工程との夫々の側に導入される。Furthermore, in the configuration of the second aspect of the invention, the combustion exhaust gas separated from unburned matter or fly ash in the separation step undergoes heat exchange and is introduced into the drying step and the combustion step, respectively.
乾燥工程の側では熱交換後の燃焼排ガスで脱水汚泥を流
動化し易い状Ｂｔで乾燥させ、他方、燃焼工程の側では
燃焼排ガスと熱交換した予熱空気で流動化しながら送給
されてきた乾燥汚泥および流動化ガスを保温する。In the drying process, the dehydrated sludge is dried with Bt, which is easy to fluidize with the combustion exhaust gas after heat exchange, and on the other hand, in the combustion process, the dried sludge is fluidized with the preheated air that has exchanged heat with the combustion exhaust gas. and keep the fluidizing gas warm.
［実施例］
以下、本発明の好適一実施例を図面を参照しながら説明
する。[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
添付図面は、本発明の高湿分廃棄物の乾燥・焼却方法を
示す循環系統図である。The attached drawing is a circulation system diagram showing the method of drying and incinerating high-humidity waste of the present invention.
図示するように、この実施例の高湿分廃棄物の乾燥・焼
却方法には下記の対象処理物を循環させる系と燃焼ガス
を循環させる系とからなる一連の乾燥・焼却装置１が使
用されている。As shown in the figure, the method for drying and incinerating high-humidity waste in this embodiment uses a series of drying and incinerators 1, which are comprised of a system for circulating target materials and a system for circulating combustion gas as described below. ing.
そのうち、対象処理物を循環させる系の乾燥・焼却装置
２部分は、対象処理物を乾燥炉へ供給するホッパー３が
乾燥炉４の入口側に設けられ、その乾燥炉４の出口側は
燃焼炉５の入口側に仕切壁６間の通路７を通じて連絡し
、この燃焼炉５の出口側上方はライザ８の入口側に接続
され、このライザ８の出口側はサイクロン９の上部に接
続され、このサイクロン９の下部は戻し配管１０を介し
て上記燃焼炉５に接続され、この燃焼炉５の出口側下方
には焼却灰排出口１１が設けられて構成される。In the drying/incineration device 2 part of the system for circulating the target processed material, a hopper 3 for supplying the target processed material to the drying furnace is installed on the inlet side of the drying furnace 4, and a combustion furnace is installed on the outlet side of the drying furnace 4. The upper part of the outlet side of this combustion furnace 5 is connected to the inlet side of a riser 8, and the outlet side of this riser 8 is connected to the upper part of a cyclone 9. The lower part of the cyclone 9 is connected to the combustion furnace 5 through a return pipe 10, and an incinerated ash discharge port 11 is provided below the exit side of the combustion furnace 5.
この乾燥・焼却装ｒ１１２によれば、乾燥炉４と燃焼炉
５とが一体化して仕切壁６で区切られているに過ぎない
から、設備費が紙皿となり、乾燥炉４の上方に排ガスの
排出路１２を設けているから、高湿分の処理ガス量も少
くて済み、この高湿分処理関係の設備も安価となる。According to this drying/incineration equipment R112, the drying furnace 4 and the combustion furnace 5 are simply integrated and separated by a partition wall 6, so the equipment cost is reduced to a paper plate, and the exhaust gas is placed above the drying furnace 4. Since the discharge passage 12 is provided, the amount of high-humidity gas to be treated can be reduced, and equipment related to high-humidity treatment can also be inexpensive.
他方、燃焼ガスを循環させる系の乾燥・焼却装置２３部
分は、上記サイクロン９の上端部を配管１３を介して熱
交換器１４に連通させ、この熱交換器１４からは配管１
５を介して乾燥炉４の下部とを連通させ、また他の配管
１６を介して燃焼炉５の下部とを連通させ、さらに、上
記熱交換器１４には空気導入管１７を接続させて構成さ
れている。On the other hand, in the drying/incineration device 23 part of the system for circulating combustion gas, the upper end of the cyclone 9 is connected to a heat exchanger 14 via a pipe 13, and from this heat exchanger 14, a pipe 1 is connected.
The heat exchanger 14 is connected to the lower part of the drying furnace 4 through a pipe 5, and the lower part of the combustion furnace 5 is connected to the heat exchanger 14 through another pipe 16. has been done.
なお、１燥炉４の上方の排出路１２は直接外方に開放す
ることができ、る他に、この排出路１２を熱交換器１４
に連通させることもできる。Note that the discharge passage 12 above the first drying furnace 4 can be opened directly to the outside, or alternatively, the discharge passage 12 can be opened directly to the outside.
It can also be communicated with.
次に上述した一連の乾燥・焼却装置１に基づいて本発明
の高湿分廃棄物の乾燥・焼却方法を説明する。Next, a method for drying and incinerating high-humidity waste according to the present invention will be explained based on the above-described series of drying and incinerators 1.
先ず、ベルトプレス真空処理で約８０％の含水分にまで
脱水された脱水汚泥１８が汚泥ホッパー３から乾燥炉４
に投入される。First, dehydrated sludge 18, which has been dehydrated to a water content of approximately 80% by belt press vacuum treatment, is transferred from the sludge hopper 3 to the drying furnace 4.
will be put into the
この乾燥炉４は炉底より配管１５に付設するノズル１９
を介して燃焼排ガス１５１を吹込み、バブリングタイプ
の流動層を形成しているので、投入された脱水汚泥１８
はその乾燥炉４内で流動化乾燥する。This drying oven 4 has a nozzle 19 attached to a pipe 15 from the bottom of the oven.
Since the combustion exhaust gas 151 is blown into a bubbling type fluidized bed through the
is fluidized and dried in the drying oven 4.
その乾燥に際しては、上記ガス１５１により乾燥温度を
２００〜４００℃とし滞留時間を調節することにより、
水分的４０％の減率乾燥域まで乾燥し流動化を促進する
。このガス１５１は、後述する燃焼排ガス１３１を熱交
換器１４で熱回収した後のガスである。During the drying, the drying temperature is set at 200 to 400°C using the gas 151 and the residence time is adjusted.
Dry to a drying range with a moisture loss rate of 40% to promote fluidization. This gas 151 is a gas obtained by recovering heat from combustion exhaust gas 131, which will be described later, in the heat exchanger 14.
このようにして乾燥された脱水汚泥１８は微粉汚泥２０
となって仕切！１１６を通過して燃焼炉５内に移動し、
そこで燃焼する。そして、燃焼した汚泥は焼却灰２１と
して排出口１１から外部に排出される。The dehydrated sludge 18 dried in this way is a fine powder sludge 20.
It becomes a partition! 116 and moves into the combustion furnace 5,
It burns there. The burned sludge is then discharged to the outside from the discharge port 11 as incinerated ash 21.
一方、燃焼しない汚泥は未燃物２２として燃焼炉５下部
から吸込まれた流動化ガスと共にライザ９内を上昇し、
続いてサイクロン９で捕集され、燃焼室５に戻るといっ
た具合に、いわゆる循環流動をする。On the other hand, the unburned sludge rises in the riser 9 as unburned matter 22 together with the fluidizing gas sucked from the lower part of the combustion furnace 5,
Subsequently, it is collected by the cyclone 9 and returned to the combustion chamber 5, resulting in a so-called circulating flow.
上記流動化ガスは約５００〜７００℃に予熱された空気
１７１を使用する。この予熱空気は後述するように熱交
換器１４に導入される空気１７１が燃焼排ガス１３１か
ら奪熱することにより調整されるものである。The fluidizing gas used is air 171 preheated to about 500-700°C. This preheated air is adjusted by the air 171 introduced into the heat exchanger 14 removing heat from the combustion exhaust gas 131, as will be described later.
乾燥炉４から燃焼炉５内へ順次送給された微粉汚泥２０
は、上述の循環流動が行われている循環流動層内で燃焼
焼却に必要な時間だけ循環流動（滞留）する、そのため
、焼却灰中に未燃分は全く残らず、完全燃焼・焼却が可
能となる。Fine powder sludge 20 sequentially fed from the drying furnace 4 into the combustion furnace 5
The ash circulates (remains) for the time required for combustion and incineration in the circulating fluidized bed where the above-mentioned circulating flow is carried out.Therefore, no unburned matter remains in the incinerated ash, allowing for complete combustion and incineration. becomes.
この循環流動層の排ガスは燃焼排ガス５０１で顕熱が大
きくこの顕熱回収を目的に上記熱交換器１４が設けられ
、この回収熱はその熱交換器１４に導入される空気１７
１に奪熱される方法で、この循環流動層の流動化ガスの
予熱用空気１６１に利用される。The exhaust gas of this circulating fluidized bed is combustion exhaust gas 501 and has a large sensible heat.The heat exchanger 14 is provided for the purpose of recovering this sensible heat, and this recovered heat is transferred to the air 17 introduced into the heat exchanger 14.
The air 161 is used for preheating the fluidizing gas of this circulating fluidized bed by the method of removing heat from the air 161.
一方、この熱交換器１４を経由した循環流動層の排ガス
は、配管１５に案内されて上述のように乾燥炉４の流動
化ガス、即ち、乾燥ガスとして利用される。On the other hand, the exhaust gas from the circulating fluidized bed that has passed through the heat exchanger 14 is guided to the pipe 15 and is used as fluidizing gas, ie, drying gas, in the drying furnace 4 as described above.
乾燥炉４内で生ずる排ガス４０１は水分が高く、所定の
ガス処理後、大気放散または燃焼炉５内へ吹込まれる。The exhaust gas 401 generated in the drying furnace 4 has a high moisture content, and is discharged into the atmosphere or blown into the combustion furnace 5 after a predetermined gas treatment.
［発明の効果］
以上述べたように、請求項１の発明によれば、下記の効
果を発揮する。[Effects of the Invention] As described above, according to the invention of claim 1, the following effects are achieved.
（１） 各工程毎にコントロールが可能となるから、
高湿分廃棄物の乾燥・焼却方法して、Ｉ＆適の性状を考
慮した循環流動層に調整できる。(1) Since each process can be controlled,
The method of drying and incinerating high-humidity waste can be adjusted to a circulating fluidized bed that takes into account the properties of I&O.
（２） そのため、処理能力が高められる。(2) Therefore, processing capacity is increased.
また、請求項２の発明によれば、下記の効果を発揮する
。Moreover, according to the invention of claim 2, the following effects are exhibited.
（１） 燃焼排ガスの熱を乾燥炉の流動化乾燥と、燃
焼炉の流動化ガスの予熱に利用できるから熱効率がよい
。(1) Thermal efficiency is good because the heat of the combustion exhaust gas can be used for fluidized drying in the drying furnace and for preheating the fluidized gas in the combustion furnace.
（２） 乾燥炉の水分の高い排ガスを燃焼炉に直接導
入しなくてよいから、燃焼効率を高めることができる。(2) Since it is not necessary to directly introduce the high-moisture exhaust gas from the drying furnace into the combustion furnace, combustion efficiency can be improved.
（３） 高湿分排ガスの量が少なく、設備的に安価で
ある。(3) The amount of high-humidity exhaust gas is small and the equipment is inexpensive.
（４） 更に乾燥炉、燃焼炉が一体化しており、設備
費が安い。(4) Furthermore, the drying furnace and combustion furnace are integrated, so equipment costs are low.
添付図面は本発明の高湿分廃棄物の乾燥・焼却方法を示
す循環系統概要図である。
図中、４は乾燥炉、５は燃焼炉、１８は脱水汚泥、２０
は微粉汚泥、２１は燃焼灰、２２は未燃物、１７１は空
気である。The attached drawing is a schematic diagram of a circulation system showing the method of drying and incinerating high-humidity waste according to the present invention. In the figure, 4 is a drying furnace, 5 is a combustion furnace, 18 is dehydrated sludge, 20
is fine sludge, 21 is combustion ash, 22 is unburned material, and 171 is air.
Claims (1)
上記乾燥工程で乾燥された汚泥を流動化させながら燃焼
させる燃焼工程と、上記燃焼工程で生成される未燃物と
燃焼ガスとを分離させる分離工程と、上記分離工程で分
離された未燃物を上記燃焼工程に戻し、この燃焼工程で
生成される燃焼灰を外部に取り出すよう構成したことを
特徴とする高湿分廃棄物の乾燥・焼却方法。 ２、分離工程で分離された燃焼ガスを熱交換して乾燥工
程に導入すると共に熱交換して加熱した空気を燃焼工程
に導入して熱利用するよう構成したことを特徴とする請
求項１記載の高湿分廃棄物の乾燥・焼却方法。[Claims] 1. A drying step of drying dehydrated sludge to a lapse rate drying region;
A combustion process in which the sludge dried in the drying process is fluidized and combusted, a separation process in which unburned substances and combustion gas generated in the combustion process are separated, and unburned substances separated in the separation process. A method for drying and incinerating high-humidity waste, characterized in that the waste is returned to the above-mentioned combustion step, and the combustion ash produced in this combustion step is taken out to the outside. 2. The combustion gas separated in the separation step is heat-exchanged and introduced into the drying step, and the air heated by heat exchange is introduced into the combustion step for heat utilization. method for drying and incinerating high-humidity waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3737188A JPH01212811A (en) | 1988-02-22 | 1988-02-22 | Drying and incinerating of highly humid waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3737188A JPH01212811A (en) | 1988-02-22 | 1988-02-22 | Drying and incinerating of highly humid waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01212811A true JPH01212811A (en) | 1989-08-25 |
Family
ID=12495661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3737188A Pending JPH01212811A (en) | 1988-02-22 | 1988-02-22 | Drying and incinerating of highly humid waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01212811A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5162572A (en) * | 1974-11-26 | 1976-05-31 | Kubota Ltd | Kanenseiodeino shokyakuhohoto sochi |
| JPS5454465A (en) * | 1977-10-05 | 1979-04-28 | Tsukishima Kikai Co | Method of incinerating solid waste containing water and its device |
| JPS54164356A (en) * | 1978-04-12 | 1979-12-27 | Envirotech Corp | Sludge dryer by sand circulation |
-
1988
- 1988-02-22 JP JP3737188A patent/JPH01212811A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5162572A (en) * | 1974-11-26 | 1976-05-31 | Kubota Ltd | Kanenseiodeino shokyakuhohoto sochi |
| JPS5454465A (en) * | 1977-10-05 | 1979-04-28 | Tsukishima Kikai Co | Method of incinerating solid waste containing water and its device |
| JPS54164356A (en) * | 1978-04-12 | 1979-12-27 | Envirotech Corp | Sludge dryer by sand circulation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4159682A (en) | Fluid bed combustion with predrying of moist feed using bed sand | |
| JP2657896B2 (en) | Fluid bed reactor and combustion method | |
| US5339774A (en) | Fluidized bed steam generation system and method of using recycled flue gases to assist in passing loopseal solids | |
| WO2006136105A1 (en) | A combined dryer and a method and an equipment for incinerating the wet sludge with the combined dryer | |
| JPH0713521B2 (en) | Steam generator with stationary fluidized bed firebox | |
| JPH0626611A (en) | Device and method for two-stage combustion in fluidized bed reactor | |
| US3877397A (en) | Incinerators | |
| JPH06505087A (en) | Method for producing high temperature drying gas and its use | |
| WO2007006218A1 (en) | A dryer and a method and an equipment for drying and incinerating wet sludge using circulating fluidized bed with the dryer | |
| US4949655A (en) | Process for the utilization of powdered solid waste | |
| JPH1054525A (en) | Circulation fluidized bed incinerator integral with fluidized bed drier | |
| CN101526220A (en) | Double working substance bicirculating sludge incinerator | |
| JPH01212811A (en) | Drying and incinerating of highly humid waste | |
| JP2002317180A (en) | Method for controlling apparatus for producing soil improver | |
| JPS5756096A (en) | Incineration method for sludge | |
| IE39744L (en) | Incinerating waste | |
| US4335663A (en) | Thermal processing system | |
| JPH01208610A (en) | Method for burning combustibles with high water content and apparatus therefor | |
| JP2001295257A (en) | Method and device for manufacturing soil improving material | |
| US5191844A (en) | Process and apparatus for the treatment of dust or like material which is capable of trickle flow | |
| JP2002155278A (en) | Method and plant for producing ground conditioner | |
| US2147152A (en) | Incineration method and apparatus | |
| JPH0130050B2 (en) | ||
| JPH0578727B2 (en) | ||
| JP2553718B2 (en) | Method for producing activated ash |